The brackets around a matrix:
"none"
matrix
"round"
pmatrix
"square"
bmatrix
"curly"
Bmatrix
"angled"
"verticalBars"
vmatrix
"doubleVerticalBars"
Vmatrix
The brackets around a matrix:
"none": none, as LaTeX'smatrix;"round": ( ), aspmatrix;"square": [ ], asbmatrix;"curly": { }, asBmatrix;"angled": ⟨ ⟩;"verticalBars": | |, asvmatrix, for determinants;"doubleVerticalBars": ‖ ‖, asVmatrix, for norms.