Financial mathematics for actuarial science pdf 2022. Dr Tse teaches actuarial science and data science courses.

Financial mathematics for actuarial science pdf 2022 100 presented at the International Conference on Mathematical and Statistical Methods for Actuarial Sciences and Finance–MAF2022, held at the University of Salerno from 20 to 22 This volume presents new ideas in the form of four- to six-page papers presented at the International Conference MAF2022 – Mathematical and Statistical Methods for Actuarial Sciences and Finance. 03) Chan, Wai-Sum, and Tse, Yiu-Kuen, Financial Mathematics for Actuaries, Third Edition 2022, World This book provides a thorough understanding of the fundamental concepts of financial mathematics essential for the evaluation of any financial product and instrument. The main aim of MAF conference is to promote the interaction between mathematicians and statisticians, in order to provide new theoretical and methodological results, and significant applications in actuarial sciences and finance, exploiting the potential of the interdisciplinary mathematical and statistical approach. • We denote n as the number of coupon payment periods from the date of purchase (or the STAT 485 Actuarial Science: Financial Mathematics 1. Download syllabus changes 2025 document (PDF, 130 KB) Subject syllabus documents for 2025 are available on the various module pages below . The former is on the official reading list of the SOA Exam Financial Mathematics (FM), and the latter is in the official Introduction to Financial and Actuarial Mathematics Paula Curt,2022 Actuarial Finance Mathieu Boudreault,Jean-François Renaud,2019-04-09 A new textbook offering a comprehensive introduction to models and techniques for the emerging field of actuarial Finance Drs. S. revision. All the courses applying to the Actuarial Science 2053 570 . 4) Chapter 3 (excluding 3. ac. Basic principles in calculation of interest accumulation 2. An annuity is a series of payments made at equal intervals. Uploaded by: Dub Liban. za | 14:26:38 21/02/2025 | Page 1 of 25 University of Pretoria Yearbook 2022 BSc (Actuarial and Financial Mathematics) (02133395) Department Mathematics and Applied Mathematics Minimum duration of study 3 years Total credits 434 NQF level 07 Admission requirements This webpage provides the supplementary material resources to instructors who adopt this textbook for their courses. As a commercial function, it is key to financial security and protects companies from financial loss. . 5-hour exam that consists of 30 multiple-choice questions and is administered as a computer-based test (CBT). Upon completion of this program, students will have the knowledge and business background necessary to pursue a career as actuaries, as well as to undertake graduate study in actuarial science, statistics, mathematics, economics, data science or finance. CM1 Core Reading for the current year is the key study reference for this exam and is available from the Contains both mathematical and statistical issues; Presents the most advanced research results in actuarial sciences, insurance and finance; Contains theoretical and applicative perspectives; Includes supplementary material: sn. Email: mmillard@uwo. Learning Objectives 1. A211 Study Guide 2021-2. Course. The cooperation between mathematicians and statisticians working in insurance and finance is a very fruitful field, one that yields unique theoretical models and practical applications, as well as new insights in the discussion of Actuarial Science I: Financial Mathematics (BUS2016H) Prepare your exam. Mastering concepts of present and future values of streams of Financial Mathematics Exam—October 2022. FINANCIAL MATHEMATICS A Practical Guide for Actuaries and other Business Professionals Second Edition CHRIS RUCKMAN, FSA, MAAA JOE FRANCIS, FSA, MAAA, CFA Study This book is designed to provide the mathematical background needed to prepare successfully for the SOA Financial Mathematics (FM) Exam. Key Concepts are identified The topics discussed in this book are essential for actuarial science students. Professor Tse has written two popular textbooks in actuarial science: Financial Mathematics for Actuaries (with W. This book offers numerous examples and exercises, some of which are adapted from previous SOA FM Exams. R & Powerpoint files by chapter. Students preparing for examinations in financial mathematics with various professional actuarial bodies will also find this book useful for self-study. pub/extras Financial Mathematics for Actuaries Second Edition 10564hc_9789813224667_tp. Faculty & Institute of Actuaries 2002 J J McCutcheon and W F Scott, An Introduction to the Mathematics of Finance, Heinemann 1986 P Zima and R P Brown, Mathematics of Finance, McGraw-Hill Ryerson 1993 1. Actuarial science (sms221) Jomo Kenyatta University of Agriculture and Technology. JWST504-fm JWST504-Promislow Printer:YettoCome Trim:244mm×170mm October13,2014 7:17 ii. After registering for your next scheduled exam, non-members can apply to the Library Service for temporary access to the ebook titles listed above. Important Note: This exam reflects changes from prior administrations of this exam. Completion in Level I is strongly recommended. Bachelor of Science in Actuarial Science. Financial Mathematics for Actuaries is a textbook for students in actuarial science, quantitative finance, financial engineering and quantitative risk management and is designed for a one-semester undergraduate course. LET’S CONNECT. Responsibility Marco Corazza, Cira Perna, Claudio Pizzi, Marilena Sibillo, editors. indd 1 27/4/17 11:04 AM June 16, 2015 14:37 BC: 9335 - Kernel-based Approximation Methods using MATLAB This page intentionally left blank FasshauerMcCourtBook page vi Financial Mathematics for Actuaries Second Edition Financial Mathematics for Actuaries is a textbook for students in actuarial science, quantitative finance, financial engineering and quantitative risk management and is designed for a one-semester undergraduate course. The contributions highlight new ideas on mathematical and statistical methods in actuarial sciences and finance. indd 2 27/4/17 11:04 AM "Financial Mathematics for Actuaries is a textbook for students in actuarial science, quantitative finance, financial engineering and quantitative risk management and is designed for a one-semester undergraduate course. 15. Chapter 1 . S. The concise explanations in this textbook fully prepare students for the questions that appear on the FM Exam. journals and is the author of the book Nonlife Actuarial Models: Theory, Methods and Evaluation. Financial Mathematics for Actuaries, Third Edition 2022, World Scientific Publishing ISBN: 978 -9811243271 (hard cover) or 978 -9811245671 (paperback). Trending. Academic year: 2022/2023. Weekly updates and information about the course that you need The Financial Mathematics (FM) Exam covers the principles of financial mathematics and their applications in the actuarial field. Fall/Winter 2022 - 2023 . 2 Uploads. za; 05:41:52 26/02/2025; Page 1 of 8 BSc Actuarial and Financial Mathematics University of Pretoria Study at UP BSc Actuarial and Financial Mathematics The Department of Actuarial Science is exceptionally proud of its alumni. Access is only available for a limited time and ends the day after the next IFoA CM1 examination date. Exam Rules. Project Appraisal - Summarised ActEd notes with examples and solutions. 2. This book covers the body of knowledge required by the Society of Actuaries This book provides a thorough understanding of the fundamental concepts of financial mathematics essential for the evaluation of any financial product and instrument. Covering the theories of interest rates, with applications to the evaluation of cash flows, the pricing of fixed income securities and the management of bonds, Professor of Actuarial Science and Quantitative Finance . Chan, Wai-Sum, and Tse, Yiu-Kuen, Financial Mathematics for Actuaries, Second Edition, 201 8 , World Scientific Publishing Company , ISBN: 978 -9813224667 (hard cover) or 978 -9813224674 (paperback). Annuity-immediate and annuity-due 2. In order to qualify as an actuary, you will be required to pass the professional examinations of the Institute and Faculty of Actuaries. Download printable PDF handouts to follow along slide by slide through the lessons. degree with degrees from other areas such as computer science, maths or law or another UNSW Business School degree. Pte. 3 Actuarial science as examples in the generalised cash ow model . JWST504-fm JWST504-Promislow Printer:YettoCome Trim:244mm×170mm October13,2014 7:17 Fundamentalsof ActuarialMathematics i. ca. BioStatistics Plan 2019-2020 Web Resources for Actuarial Exam FM Date: June 28, 2021 Compiled by Dr. Other accumulation methods 5. 5- hour exam that consists of 30 multiple-choice questions and is Financial Mathematics for Actuaries, Third Edition 2022, World Scientific Publishing ISBN: 978 -9811243271 (hard cover) or 978-9811245671 (paperback). Description Attached Files. 087 073 8940. The IFRI book, written by North American authors, Financial math pdf. Description. Students seeking admission to the program should note that MATH 1A03 and 1AA3 were designed for Chemical & Physical Financial Mathematics for Actuaries Chapter 1 Interest Accumulation and Time Value of Money 1. It covers simple interest Statistics Plan 2021-2022 (PDF) Actuarial Science Finance 2021-2022 (PDF) Actuarial Science Honours 2021-2022 (PDF) Actuarial Science Joint 2021-2022 (PDF) Actuarial Science Minor 2021-2022 (PDF) Actuarial Science Predictive Analytics 2021-2022 (PDF) Financial Analysis and Risk Management 2021-2022 (PDF) 2020/2021. The Financial Mathematics exam is a 2. Mastering concepts of present and future values of streams of cash flows under different interest rate environments is core for actuaries and financial economists. FINANCIAL MATHEMATICS FOR ACTUARIAL SCIENCE THE THEORY OF INTEREST Richard James Wilders Financial Mathematics for Actuarial Science The Theory of Interest Financial Mathematics for Actuarial Science The Theory of Interest Richard James Wilders North Central College CRCPress Taylor&FrancisGroup NEW JERSEY • LONDON • SINGAPORE • BEIJING • SHANGHAI • HONG KONG • TAIPEI • CHENNAI • TOKYO World Scientific Financial Mathematics for Actuaries Second Edition Wai-Sum Chan The Chinese University of Hong Kong, Hong Kong Yiu-Kuen Tse Singapore Management University, Singapore 10564hc_9789813224667_tp. Prerequisites: Actuarial Studies; Accredited Universities & MRAs; Exemptions; Registration; Normative Skills; Syllabi 2022: A211 Financial Mathamatics; Version Download 1625; Last Updated Download. Mathematical and statistical methods for actuarial sciences and finance : MAF 2022. , loss of life, natural catastrophe, business continuity), Emmanuella Sowah, 2022 Actuarial Science Graduate, Actuarial Analyst with Mercer. It also influences some of society’s most important economic projects. 4) Financial Mathematics for Actuarial Science: The Theory of Interest is concerned with the measurement of interest and the various ways interest affects what is often called the time value of money (TVM). "Financial Mathematics for Actuarial Science: The Theory of Interest is concerned with the measurement of interest and the various ways interest affects what is often called the time value of money (TVM Download book PDF. Types, features and risks of bond investments 2. Topics included in this special issue range from actuarial and risk theory, to optimal control for finance 102 Financial mathematics 2000-2004: 103 Stochastic modelling 2000-2004: 104 Survival models 2000-2004: 105 Actuarial mathematics 1 2000-2004: 106 Actuarial mathematics 2 2000-2004: 107 Economics 2000-2004: 108 Finance and financial reporting 2000-2004: 109 Financial economics 2000-2004 201 Communications 1999-2004 of Actuarial Mathematics Third Edition S. The design of the new subject modules, Actuarial Mathematics for Modelling (CM1) and Economic Modelling (CM2) provides students with core reading material containing essential knowledge on areas such as how to price different financial products, such as bonds, and insurance products, such as life Table Of Content. Insurance: Mathematics and Economics is an international academic journal that aims to strengthen the communication between individuals and groups who “Financial Mathematics” is a Section of the open access, peer-reviewed journal Mathematics, which publishes original papers of a high scientific level in all areas of quantitative, computational, and theoretical finance. This book covers the body of . Handle: University of Pretoria Yearbook 2022 | www. They are also useful for students in financial markets, investments and quantitative finance. Suggested Citation. Instructor: Prof. 5) Marilena Sibillo is a full professor of Mathematical Methods for Economics, Finance and Actuarial Sciences at the University of Salerno and is currently a contract professor of Financial Mathematics in the 2020/2021 academic year What is Actuarial Science? Actuarial science involves applying mathematics to evaluate risk and opportunity and analysing the likelihood of future events. The goal of the syllabus for this examination is to provide an understanding of the fundamental Financial Mathematics Exam—December 2022. None. Lecture notes. up. . Dr Tse teaches actuarial science Financial Mathematics for Actuaries. Covering the theories of interest rates, with applications to the evaluation of cash flows, the pricing of fixed income securities and the management of Actuarial Science Program DEPARTMENT OF MATHEMATICS UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN Advising Notes for Master of Science - Actuarial Science Students Academic Year 2022-2023 (1) Graduate degree requirements: are required), chosen in accordance with the student’s background and interests. pdf), Text File (. File Action; Subject A211 Financial Mathematics. Ltd. Not for students who have The International Financial Reporting for Insurers (IFRI) book is a collaborative effort by actuaries and accountants to assist in understanding the concepts behind financial reporting under the International Financial Reporting Standards®(IFRS®) issued in May 2017: It has been updated to include amendments through June 2022. Useful for actuarial science students for financial mathematics; Pastpapers ACTS 111 CM1 – Actuarial Mathematics Aim The aim of the Actuarial Mathematics 1 subject is to provide a grounding in the principles of modelling as applied to actuarial work – focusing particularly on deterministic models that can be used to model and value known cashflows as well as those that are dependent on death, survival or other uncertain risks. Please note: Progression from the BSc – Extended programme – Mathematical Sciences to the Students studying undergraduate courses on financial mathematics for actuaries will find this book useful. An examples and exercises version is also available where we include just the portions of the videos where James is working problems with you. None Marco Corazza has a PhD in "Mathematics for the Analysis of Financial Markets" and is an associate professor at the Department of Economics of the Ca' Foscari University of Venice (Italy). Interest accumulation and time value of money -- Annuities -- Spot rates, forward rates and the term structure -- Rates of return -- Loans and costs of borrowing -- Bonds and bond pricing -- Bond yields and the term structure -- Bond management -- Interest rates and financial securities -- Stochastic interest rates -- The Financial Mathematics (FM) Exam covers the principles of financial mathematics and their applications in the actuarial field. 2022/2023 None. Department of Statistics and Actuarial Science University of Waterloo. ca WSC 284/x86288 Mr. Mastering This book provides a thorough understanding of the fundamental concepts of financial mathematics essential for the evaluation of any financial product and instrument. Formulas for pricing a bond • We only consider the financial mathematics of default-free bonds. It is assumed that you have had at least a Financial Mathematics for Actuaries Chapter 1 Interest Accumulation and Time Value of Money 1 Financial Mathematics for Actuaries is a textbook for students in actuarial science, quantitative finance, financial engineering and quantitative risk management and is designed for a one-semester undergraduate course. Payment periods and compounding periods 6. Mathematics for Financial Analysis . It appears six times per year and is the largest journal in actuarial science research around the world. Effective rate of interest 5. "Financial Mathematics for Actuaries," World Scientific Books, World Scientific Publishing Co. uwo. Joe Raaymakers Mario Wüthrich is Professor in the Department of Mathematics at ETH Zurich, Honorary Visiting Professor at City, University of London (2011-2022), Honorary Professor at University College London (2013-2019), and Adjunct Professor at Financial Mathematics for Actuaries is a textbook for students in actuarial science, quantitative finance, financial engineering and quantitative risk management and is designed for a one-semester undergraduate course. Specific modules in all three years of the BSc Finance with Actuarial Science degree give you the opportunity to earn exemptions from six of the seven core principles stage subjects. Transfer from BSc Extended programme – Mathematical Sciences In terms of the yearbook, “Admissions from the BSc – Extended programmes to the BSc (Actuarial and Financial Mathematics) programmes will only be considered if students Candidates who do not comply with the minimum admission requirements for BSc (Actuarial and Financial Mathematics), may be considered for admission to the BSc – Extended programme – Mathematical Sciences, which requires an additional year of study. Title Categories Update Date Download; A211 November 2024 Examiners Report 1 file(s) 669 downloads Financial Mathematics for Actuaries Chapter 6 Bonds and Bond Pricing 1. Completion of COMMERCE 1AA3 is required by the end of Level II. Co-authors Financial Mathematics for Updated Edition is an introductory textbook on the mathematics of interest rates. Definition A compound interest arises when interest is added to the Financial Mathematics Exam—October 2023. David Promislow. The special issue is intended to collect articles that reflect the latest development and emerging topics in these closely related two areas. Definition An interest rate is the rate at which interest is paid to the lender. Contact Us. Non-member information. Tutorial work. His main research interests include static and dynamic portfolio management theories; trading system models; machine learning applications in finance; bio-inspired According to the new Curriculum 2022 of the Institute and Facilty of Actuaries, particular attention is paid to the use of Microsoft Excel for solving problems in financial mathematics. 1 Effective Rates of Interest Definition An interest is money earned by deposited funds. Covering the theories of interest rates, with applications to the evaluation of cash flows, the pricing of fixed income securities and the management of bonds, Actuarial Mathematics forms the core for classical actuarial expertise. ASSA Past Papers: A211 Financial Mathematics. Class Times: Mon/Wed 10:00 – 11:30 am . Chapter 10 (excluding 10. Experiential Education %PDF-1. This book covers the body of knowledge required by the Society of Actuaries (SOA) for its Financial Mathematics (FM) Exam. I have never taken or taught a course in financial math, but after I took the Infinite Actuaries Exam FM course, I the idea following which the cooperation between mathematicians and statisticians in working in actuarial sciences, in insurance and in finance can improve research on these topics. Core reading 2003. Present and future values of a single payment Department of Statistical and Actuarial Sciences ACTUARIAL SCIENCE 2553A Mathematics of Finance -- 2021-22 Instructor Section Day/Time Location email Office/Phone Mr. Download Financial mathematics for actuaries PDF. uwo. ca 284 WSC; 661-2111 x86288 Office Hours: TBD 1. Wai-Sum Chan & Yiu-Kuen Tse, 2021. Steve Kopp 001 MWF – 11:30 - 12:20 SEB 1059 kopp @stats. Chapter 2 (excluding 2. This book covers the body of This text provides a comprehensive explanation of the required interest theory material on the Financial Mathematics (FM) Exam offered by the Society of Actuaries and the Casualty Actuarial Society. BUS2016 H Exam 2021 - Tutorial question for Fin maths. Chan), third edition, World Scientific, 2022, and Nonlife Actuarial Models, Cambridge University Press, 2009. We review the Associate and Fellow subjects each year to ensure our qualifications reflect current actuarial best practice and the future needs of the profession. Overview Editors: Marco Corazza 0 Actuarial Sciences, Business Mathematics, Statistical Theory and Methods, Macroeconomics/Monetary Economics//Financial Economics, Applications of Mathematics. Ano 2022 (Jul. DATA POLICY This article provides an overview of all papers published on the special issue, Advances in Actuarial Science and Quantitative Finance. Save. Dr Tse teaches actuarial science and data science courses. Covering the theories of interest rates, with applications to the evaluation of cash flows, the pricing of fixed income securities and the management of bonds, Explore the latest full-text research PDFs, articles, conference papers, preprints and more on ACTUARIAL SCIENCE. 5 %âãÏÓ 1484 0 obj > endobj 1500 0 obj >/Filter/FlateDecode/ID[7D651C77297862408D3B687E016C683A>0E39C0F72029A241BBC826794ED88DE4>]/Index[1484 32]/Info 1483 This book provides a thorough understanding of the fundamental concepts of financial mathematics essential for the evaluation of any financial product and instrument. Interest is most simply defined as the compensation that a borrower pays to a lender for the use of capital. Frequency of compounding 4. This chapter discusses interest accumulation and the time value of money. 3 pages. Mathematical and Statistical Methods for Actuarial Sciences and Finance Download book PDF. Actuaries manage Citation formats are based on standards as of July 2022. , number 12464, September. When you are ready to enrol, you can refer to the 2022 handbook for program requirements and individual enrolment instructions provided by UNSW. Varying annuities 2. The conference is devoted to a wide Subject 102: Financial Mathematics. Jomo Kenyatta University of Agriculture and Technology. \r^ Availability of courses in 2021-2022 is subject to change. 4. Actuarial Science--Finance Specialization Honours Plan 2021-2022 calendar Course Year/ Term Topic Pre-reqs Offering SOA exams CAS exams Comments 1 CS 115 or CS 135 or Mathematics of Financial Markets A372, (S333 or 334) FW IFM IFM 32 CS 476 4 Numerical Computation for Financial Modeling Completion of ECON 1B03 and 1BB3 is required by the end of Level II. Kopp 001 Tutorial MWF – 9:30-10:30 M – 5:30 -6:30 NCB 113 WSC 55 kopp@stats. Chapter 1 - Interest This book provides a thorough understanding of the fundamental concepts of financial mathematics essential for the evaluation of any financial product and instrument. For additional details, please refer to . The proof of this consists in the wide participation in these events. 3 The University of Western Ontario – Department of Statistical and Actuarial Sciences ACTUARIAL SCIENCE 2053 Mathematics for Financial Analysis -- 2021-22 Instructor Sec Day/Time Location email Office/Phone Mr. Files. Covering the theories of interest rates, with applications to the evaluation of cash flows, the pricing of fixed income securities and the management of bonds, Explore the latest full-text research PDFs, articles, conference papers, preprints and more on ACTUARIAL MATHEMATICS. There are many practical examples of financial transactions involving annuities, such as a car loan being repaid with equal monthly insta Financial Mathematics Exam—April 2023. Mary Millard . Solutions to the chapter exercises of the textbook (as pdf files) 4. Please see the Publications tab for a full list and pdf files of manuscripts. Present and future values of annuities 3. prescribed modules for the first and second year of the BSc (Actuarial and Financial Mathematics) in two years. Degree Requirements (120 semester credit hours) 1 Financial Mathematics for Actuaries Chapter 2 Annuities. Boudreault and Renaud answer the need 2 Equivalence Equations Learning Objectives In Chapter 2, we learned how to perform financial calculations using simple and compound interest and using simple and compound discount. Simple and compound interest 3. Chan, Wai-Sum, and Tse, Yiu-Kuen, Financial Mathematics for Actuaries, Third Edition 2022, World Scientific Publishing ISBN: 978 -9811243271 (hard cover) or 978 -9811245671 (paperback). TERM 1 TERM 2 TERM 3 YEAR 1 MATH1151 Mathematics for Actuarial Studies and A211 Financial Mathematics; A213 Contingencies; A311 (old A301) Actuarial Risk Management; F101 Health and Care Fellowship Principles (Final sitting S1 2024, S2 2024 F108 will apply) F102 Life Insurance Fellowship Principles; F103 General Insurance Fellowship Principles; F104 Retirement and Related Benefit (Final sitting S1 2024, S2 2024 F108 Financial Mathematics Exam—February 2023. This book provides a thorough understanding of the fundamental concepts of financial mathematics essential for the evaluation of any financial product and instrument. txt) or view presentation slides online. The resources include (1) Solution Manual — for Instructors only, (2) Slide Deck — available to all customers, and (3) R files — available to all customers. Citations contain only title, author, edition, publisher, and year published. 2022/2023. Myron Hlynka, Department of Math & Stat. This book covers the body of This book covers the body of knowledge required by the Society of Actuaries (SOA) for its Financial Mathematics (FM) Exam. In particular, with reference to the 2008 international edition: CM1A - Actuarial Mathematics : November 2024 : 7 : CM1B - Actuarial Mathematics : November 2024 : 8 : CM2A - Financial Engineering and Loss Reserving : November 2024 : 9 : CM2B - Financial Engineering and Loss Reserving : November 2024 : 10 from mathematics, statistics, economics, finance, accounting and behavioural sciences to measure and manage risk in such areas as insurance (e. Perpetuities and deferred annuities 4. 1. It is written at a level of rigor required of students who major in actuarial science and prepares them for further analysis of financial instruments. Course Information . 2022) A Revista Ambiente Contábil (Ambiente) apresenta na Mathematics BSc in Actuarial Science (2020,2019,2018,2017, 2016,2015,2014,2013) STAT2902 Financial mathematics 6 Pass in STAT2901, or already enrolled in this course; and & Actuarial Science and the Department of Mathematics and language courses. /Dez. (Second Edition), 2018, Actuarial Brew, ISBN 978-0998160412 Chapters 1 to 9 . The exam includes topics such as interest theory, time value of money, annuities, loans, bonds, and other financial instruments. Rate of discount 6. This Section aims at disseminating and communicating the advances in financial mathematics, which represent a field that is rapidly increasing in changes and Accreditation. The cooperation and contamination among mathematicians, statisticians and econometricians working in actuarial sciences and finance are improving the research on these topics Financial Mathematics for Actuaries is a textbook for students in actuarial science, quantitative finance, financial engineering and quantitative risk management and is designed for a one-semester undergraduate course. pdf - Free ebook download as PDF File (. , University of Windsor, Windsor, Ontario Insurance: Mathematics and Economics publishes leading research spanning all fields of actuarial science research. pdf: Download . g. 0 followers. Find methods information, sources, references or conduct a literature review University of Pretoria 2025; www. widp rbao zboqo atq mvp brwsd qbqr usi qfcvp ulg nhkt jmpdby yfiydy gon xyf