"main diagonal"^^ . . "107768891"@en-us . "0"^^ . . . "08268636-n"^^ . . . . "the diagonal of a square matrix running from the upper left entry to the lower right entry"@en-us . "108268636"^^ . . . . "0"^^ . . "main diagonal"@en-us . "principal diagonal"@en-us .