Ray D. Sameshima

Research

Book

• Lectures on Graph Theory: Insights into Feynman Diagrams
  Springer Nature, 2025. Graph-theoretic methods and their applications to the structure of Feynman integrals.

Research Interests

Feynman integrals and scattering amplitudes; graph-theoretic, algebraic, and analytic methods in quantum field theory; mathematical foundations of thermodynamics and relativity.

Teaching & Educational Materials

• A Practical Guide to Writing in Physics Courses
  A student guide to scientific communication, physics solutions, mathematical arguments, and laboratory reports.
• Thermodynamics: À la manière de Tasaki
  Lecture notes on an operational and axiomatic approach to thermodynamics.
• Geometric Algebra and Electromagnetism
  Expository notes on electromagnetic theory using geometric algebra.
• Jordan Curve Theorem
  A self-contained study note on the Jordan curve theorem and its analytic and topological foundations.
• Group Theory 101
  Introductory notes on groups and basic algebraic structures.
• An Object Sitting in Two Categories
  A short categorical note on an object viewed through two mathematical structures.

Teaching

I teach undergraduate physics in lecture and laboratory formats. My teaching emphasizes the connection among physical principles, mathematical reasoning, experiment, computation, and scientific communication.