Formulas
- Hermitian symmetric space
- Herschel graph
- Herzog–Schönheim conjecture
- Herz–Schur multiplier
- Heteroclinic orbit
- Heun's method
- Heun function
- Hidden subgroup problem
- Hierarchy (mathematics)
- Higgs bundle
- Higher spin alternating sign matrix
- Highest-weight category
- Highly abundant number
- Highly cototient number
- Hobby–Rice theorem