Semiring
A semiring is a set together with two Binary Operators 
satisfying the following conditions:
- 1. Additive associativity: For all
, 
, - 2. Additive commutativity: For all
, 
, - 3. Multiplicative associativity: For all ,
, - 4. Left and right distributivity: For all ,
and 
.
References
Rosenfeld, A. An Introduction to Algebraic Structures. New York: Holden-Day, 1968.
- Hebesphenomegacorona
- Hecke Algebra
- Hecke L-Function
- Hecke Operator
- Hecke Ring
- Hectogon
- Hedgehog
- Heegaard Diagram
- Heegaard Splitting
- Heegner Number
- Heesch Number
- Heesch's Problem
- Height
- Heilbronn Triangle Problem
- Heine-Borel Theorem
- Heine Hypergeometric Series
- Heisenberg Group
- Heisenberg Space
- Held Group
- Helen of Geometers
- Helicoid
- Helix
- Helly Number
- Helly's Theorem
- Helmholtz Differential Equation