... >> Mathematics >> Abstract Algebra >> Trace
Highest Rated Sign
Nobody has posted a sign yet.
Definition: The trace of an n X n matrix A = [a_ij] is the sum of the entries on its main diagonal and is denoted by tr(A). That tr(A) = a_11 + a_22 + ... + a_nn.
Source: Linear Algebra: A Modern Introduction, 3rd edition by David Poole (note-custom edition titled Matrix Algebra)