Irrotational Field
A Vector Field 
for which the Curl vanishes,
See also Beltrami Field, Conservative Field, Solenoidal Field, Vector Field
- Hessian Determinant
- Heteroclinic Point
- Heterogeneous Numbers
- Heterological Paradox
- Heteroscedastic
- Heterosquare
- Heuman Lambda Function
- Heun's Differential Equation
- Heuristic
- Hexa
- Hexabolo
- Hexacontagon
- Hexacronic Icositetrahedron
- Hexad
- Hexadecagon
- Hexadecimal
- Hexaflexagon
- Hexagon
- Hexagonal Number
- Hexagonal Pyramidal Number
- Hexagonal Scalenohedron
- Hexagonal Tiling
- Hexagon Polyiamond
- Hexagram
- Hexagrammum Mysticum Theorem