NonCommutativeMultiply

a ** b ** c is a general associative, but non-commutative, form of multiplication.

NonCommutativeMultiply has attribute Flat.

Instances of NonCommutativeMultiply are automatically flattened, but no other simplification is performed.

You can use NonCommutativeMultiply as a generalization of ordinary multiplication for special mathematical objects.

See The Mathematica Book: Section A.2.7.

See also: Dot, Times, Cross.

Further Examples