I will post useful materials for studying mathematical olympiads in this page.

**My books:**

- M. Billal and A. H. Parvardi.
*Topics in Number Theory, An Olympiad Oriented**Approach*. Independently published. September 2018.- Website: https://TopicsInNumberTheory.com
- Sample chapters (password: Riemann)

- A. H. Parvardi.
*Functional Equations in Mathematical Olympiads (2017 – 2018): Problems and Solutions (Vol. I). Independently published.*May 2018

**My problem sets:**

- A. H. Parvardi.
*Number Theory Problems in Mathematical Competitions (2015 – 2016)*. May 2018. [Download for Free][AoPS]

- A. H. Parvardi.
*LTE Challenge Problems*. December 2017 [AoPS] - A. H. Parvardi, B. Engwall.
*1220 Number Theory Problems (The J29 Project)*. August 2012. [AoPS] - A. H. Parvardi.
*100 Number Theory Problems (With Solutions)*. June 2011 [AoPS] - A. H. Parvardi.
*100 Combinatorics Problems (With Solutions)*. June 2011 [AoPS] - A. H. Parvardi.
*100 Functional Equations Problems (With Solutions)*. June 2011 [AoPS] - A. H. Parvardi.
*100 Inequalities Problems (With Solutions)*. June 2011 [AoPS] - A. H. Parvardi.
*150 Geometry Problems (With Solutions)*. June 2011 [AoPS] - A. H. Parvardi.
*50 Trigonometry Problems*. February 2011 [AoPS]

**Number theory books:**

Number Theory Structures, Examples, and Problems – Titu Andreescu and Dorin Andrica

An Introduction to Diophantine Equations – Titu Andreescu, Dorin Andrica, Ion Cucurezeanu

104 Number Theory Problems – Titu Andreescu, Dorin Andrica, Zuming Feng

Here is a list of useful number theory books/notes which can be downloaded from this website:

Elementary Number Theory – W. Edwin Clark

Numbers and Curves (book draft, Springer, 2001) – Franz Lemmermeyer

Algorithmic Number Theory (web draft, 2002) – S. Arun-Kumar

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