MatrixSymbol

MatrixSymbol[a] represents a matrix with name a.

• MatrixSymbol[a, {m, n}] represents an m×n matrix.
• MatrixSymbol[a, {m, n}, dom] represents a matrix with elements in the domain dom.
• MatrixSymbol[a, {m, n}, dom, sym] represents a matrix with the symmetry sym.

Examples

MatrixSymbol["A", {3, 3}]

MatrixSymbol["M", {2, 2}, Reals, "Symmetric"]

Please visit the official Wolfram Language Reference for more details.