Some PDF's which are in a mature shape

Summer Multivariable [117 pages PDF]	Vector Analysis and Lin alg I [201 pages PDF]	Vector Analysis and Lin alg II [201 pages PDF]	Linear Algebra and Probability [158 pages PDF]	Single Variable [239 pages PDF]	Dynamical systems [179 pages PDF]	Probability and Stochastic processes [382 pages PDF]	Teaching Math from historical Point of view [81 pages PDF]

Highschool to undergraduate level

• Math Circle: 2014 Chinese remainder theorem [PDF],
• MAA 2012, Differential geometry of Graphs, [PDF],
• 2012, Geometry of Networks, [PDF],
• Math Circle: 2009 Polyhedra and Polytopes [PDF],
• Math Table: Treasure Hunting Perfect Euler Cuboids [PDF]
• Math Circle: 2007 Perfect numbers [PDF]
• Math Circle: 2007 AI [PDF]
• Math Circle: Playing with Diophantine equations, 2006 [PDF]
• Math Circle: Fashion in Mathematics 2004 [PDF]
• Warmup Series: An hour on Complex numbers, 2004, [PDF]
• Math Circle: 2003 Billiards [PDF]
• Math Table (interview talk for Harvard): Classical and Open problems about Billiard Dynamics 1999 [PDF]

Undergraduate level

• Math 22, (Fall 2018) [PDF]
• College Multivariable, (Fall 2017)
• Single Variable, (Spring 2014)
• Math with historical perspective (2014)
• Linear algebra with applications, (Fall 2010)
• Summer Multivariable, (2018)
• Math 19, Linear Algebra and Probability (Spring 2011)
• Math21a: 2002 Probability in calculus [PDF]
• Math121, two hours on determinants 2005 [PDF]
• Residue calculus (1996) PDF
• Several complex variables 1996 [PDF]
• Geometry and geometric analysis 1995 [PDF]
• Probability on Calculus Level 1995 [PDF]
• Probability in multivariable calculus, Fall [2002]

Undergraduate to graduate level

• Math118r, Dynamical systems, spring 2004, [PDF], quizes [PDF], homework [PDF].
• Geometry and geometric analysis (1995) PDF
• Introduction to Probability 1994 [PDF].
• Calculus of variations: Moser script at ETH
• Probability, 2009 (from 1994 lecture notes at Caltech), (updated April 2011)
• Notes on mathematical statistics, 2002 [PDF].