- hexyl circle
- hexyl triangle
- Hey, K.
- Heytesbury, W.
- Heyting, A.
- Heyting algebra
- Heyting arithmetic
- Heyting formal system
- Hey zeta-function
- H-fractal
- H-function
- H-graph
- Hh function
- Hida calculus
- Hida distributions
- Hida Takeyuki
- hidden
- hidden component
- hidden periodicity
- hidden replication
- hidden symmetry
- hidden variable
- hidden variables theory
- hidden zero
- hierarchical