autonomous differential equation
is autonomous, but 
is not.
- Heine-Borel theorem
- Heisenberg's uncertainty principle
- Heisenberg, Werner Karl
- helicoid
- helix
- hemisphere
- hemi‐
- hendecagon
- heptagon
- hepta‐
- hereditary property
- Hermite, Charles
- Hermite polynomials
- Hermitian
- Hermitian conjugate
- Hero (Heron) of Alexandria
- Hero's formula
- Hero's method
- hertz
- Hessian
- heteroscedastic
- heuristic
- hexadecimal representation
- hexagon
- hexagram