Identity Element
The identity element 
(also denoted 
, 
, or 
) of a Group or related mathematical structure 
is the uniqueelements such that 
for every element 
. The symbol ``'' derives from the German word for unity, ``Einheit.''
- Green's Function--Poisson's Equation
- Green's Identities
- Green Space
- Green's Theorem
- Gregory Number
- Gregory's Formula
- Grelling's Paradox
- Grenz-Formel
- Griffiths Points
- Griffiths' Theorem
- Grimm's Conjecture
- Grinberg Formula
- Groemer Packing
- Groemer Theorem
- Gronwall's Theorem
- Gross
- Grossman's Constant
- Grothendieck's Constant
- Grothendieck's Theorem
- Ground Set
- Group
- Group Convolution
- Groupoid
- Group Orthogonality Theorem
- Group Ring