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Minors (modified)ListConvolve

Tr

FilledSmallSquareTr[list] finds the trace of the matrix or tensor list.

FilledSmallSquareTr[list, f] finds a generalized trace, combining terms with f instead of Plus.

FilledSmallSquareTr[list, f, n] goes down to level n in list.

FilledSmallSquareTr[list] sums the diagonal elements list[[i, i, ... ]].

FilledSmallSquareTr works for rectangular as well as square matrices and tensors.

FilledSmallSquare See The Mathematica Book: Section 3.7.7.

FilledSmallSquare See also: Transpose, Det, DiagonalMatrix, Eigenvalues.

Further Examples

Minors (modified)ListConvolve