I = identity

Basic properties

• ${\displaystyle \{\gamma ^{\mu },\gamma ^{\nu }\}=2g^{\mu \nu }}$

Gamma matrices

• ${\displaystyle \gamma ^{\mu }\gamma _{\mu }=4I}$

Trace relations

• ${\displaystyle {\textrm {Tr}}(\gamma ^{\mu }\gamma ^{\nu })=4g^{\mu \nu }}$
• ${\displaystyle {\textrm {Tr}}(\gamma ^{\mu }\gamma ^{\nu }\gamma ^{5})=0}$

See also

• w:Clifford algebra