Toronto Math Circles

Other guest lecturers have included Joy Wang, David McLaughlin, Victor Fan, Daniel Spivak, Taras Kolomatski, Sacha Mangerel, and David Pechersky.

Andrey Khesin

​Math Circles Lecturer


Andrey Khesin graduated from the TOPS program in 2015. He is currently pursuing a Math and Physics Specialist undergraduate degree at the University of Toronto. He has been involved with Toronto Math Circles since 2009. Previous experience includes working as a counselor at SigmaCamp.

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Rad de Peiza

​Math Circles Lecturer - Original Math Circles Founder

Rad de Peiza is a retired secondary mathematics instructor who has taught in public and private schools in Toronto.  He has served as a past president of the Ontario Math Coordinators Association. 

He has been involved in enrichment activities and challenges for bright, talented, and gifted students since the 1970's.  He is a founding member of the former Scarborough Enrichment Math Program and together with Dr. Larry Rice and Peter Crippin, the Scarborough Math League and the Ontario ARML team.  In 2002, Rad, Dr Rice, and Prof Edward Barbeau founded the Toronto Math Circles. 

Byung Chun

​Math Circles Lecturer


Byung Chun was a Canadian Medalist at the International Mathematical Olympiad and currently teaches at Upper Canada College.  A favorite lecturer at the Toronto Math Circles, Byung has experience with organizing math retreats, trips, and camps in the past. Sarah and Byung first started working together 8 years ago at the Canadian Mathematical Society National Math Camp. 

Eddy Liu

​Math Circles Lecturer, ARML Coach


Eddy spent most of his high school years focusing on mathematics competitions and continued this dedication throughout university. He has an undergraduate degree from University of Waterloo in pure mathematics and a Master's degree from University of Waterloo in Quantitative Finance. Currently, he works as a Model Risk Specialist at a financial institution. He has been involved with Toronto Math Circles since 2013. He is currently the head coach for the Ontario ARML team and the problem composer for the team selection test.

Sarah Sun

​Math Circles Organizer

Sarah.Sun@torontomathcircles.ca


The main organizer for Toronto Math Circles, Sarah Sun has been writing national and international math competitions since the age of 11.  A graduate of the University of Waterloo, she double majored in Mathematical Finance and Statistics.  Currently, she works as a Senior Manager for a financial institution.  She has been involved with the Toronto Math Circles since 2011.  Previous experience includes Waterloo Math Circles and lecturing for the Canadian Mathematical Society National Camps.