## SetStandardMatrixElements

`SetStandardMatrixElements[{sm1 -> abb1}, {sm2 -> abb2}, ...]`  sets abbreviations `abb1, abb2, ...` for matrix elements `sm1, sm2, ...`.

SetStandardMatrixElements[{sm1 -> abb1}, {sm2 -> abb2}, ..., cons]. Set abbreviations `abb1, abb2, ...` for matrix elements `sm1, sm2, ...` using energy-momentum conservation `cons`, e.g. `k2 -> p1 + p2 - k1`

### See also

[Overview](Extra/FeynCalc.md), [OneLoop](OneLoop.md).

### Examples