Encyclopedia

principal diagonal

[′prin·sə·pəl dī′ag·ən·əl]

(mathematics)

For a square matrix, the diagonal extending from the upper left-hand corner to the lower right-hand corner of the matrix, that is, the diagonal containing the elements a_ijfor which i = j. Also known as main diagonal.

Mentioned in

classical canonical matrix
continuant matrix
diagonal matrix
eigenmatrix
Givens's method
identity matrix
Jacobi canonical matrix
Jordan Matrix
main diagonal
Matrix
Symmetric Matrix
trace
triangular matrix
tridiagonal matrix

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