Harold Sultan

About Me

I am a part time Instructor of Mathematics at George Washington University. I earned my PhD from Columbia, where my advisors were Jason Behrstock and Walter Neumann.

Research Interests

Geometric Group Theory, Low Dimensional Topology
Mapping Class Groups, Teichmuller Theory

I also work at Hightouch on agentic AI systems for marketing and data infrastructure.

Teaching

George Washington University

• MATH 1231: Single-Variable Calculus I (Fall 2026) Show Lecture Notes
• MATH 1231: Single-Variable Calculus I (Spring 2026) Show Lecture Notes
  • January 15, 2026 - Transformations and Trigonometry
  • January 20, 2026 - Intro to Limits
  • January 22, 2026 - Limit Laws
  • January 27, 2026 - Continuity
  • January 29, 2026 - Limits with Epsilon Delta
  • February 3, 2026 - Introduction to Derivatives
  • February 5, 2026 - Differentiation Rules
  • February 10, 2026 - Rates of Change
  • February 12, 2026 - Trigonometric Derivatives
  • February 17, 2026 - Chain Rule
  • February 19, 2026 - Implicit Differentiation
  • February 24, 2026 - Related Rates and Linear Approximations
  • February 26, 2026 - Critical Points and MVT
  • March 17, 2026 - Shapes of Graphs
  • March 19, 2026 - Infinity and Optimizations
  • March 24, 2026 - Approximating Areas
  • March 26, 2026 - Definite Integral
  • March 31, 2026 - Fundamental Theorem of Calculus
  • April 2, 2026 - Integration Formulas
  • April 7, 2026 - Integration by Substitution
  • April 14, 2026 - Area between Curves
  • April 16, 2026 - Volume by Slicing
  • April 21, 2026 - Cylindrical Shells
  • April 23, 2026 - Arc Length

Previous Teaching

• Brandeis University
• Columbia University