OTIS (officially OTIS Math LLC) is a proof-based olympiad training program. (Students not yet ready for proofs may be interested in my list of mentors and programs.)

About OTIS#

Syllabus#

Other documents#

Read the above syllabus first if you’re new to OTIS.

• Video tour of website
• List of topics (now featuring artwork)

• Example materials from each of the three difficulty tracks:

  • B-level track handout (easiest track)
  • D-level track handout and solutions
  • Z-level track handout (hardest track)

• Example practice exam: JMO, USAMO, and solutions

The OTIS Excerpts#

Around the start of 2019, I posted publicly a collection of 202 problems and solutions based on materials for OTIS. This mini-book was named The OTIS Excerpts. It’s designed to mostly be beginner-friendly though some of the chapters are more challenging.

Application — Year XI (2025-2026)#

The application for 2025-2026 is available now and is due August 1, 2025.

• Application homework and instructions
• Submission form
• Financial aid request form

Who can apply (aka, everyone)#

OTIS is open to anyone, including international students from all countries. Students from minorities and underrepresented groups are especially encouraged to apply. (I promise I don’t bite.) Full financial aid is available for all applications (even late) and admissions is need-blind. There are no age restrictions on OTIS in either direction.

Admissions are only done to ensure students have enough mathematical background and writing ability (due to sheer number of students, there is no “grading”), understand English, and are able to learn from Evan-style writing. In particular, admissions is not a merit-based competition. See the application PDF for more details.

People#

Staff#

Staff who were themselves alum’s have their years of participation as students denoted in parentheses.

Photos#