Definition of principal diagonal in English:

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principal diagonal

noun

Mathematics
The set of elements of a matrix that lie on the line joining the top left corner to the bottom right corner.
Example sentences
  • The resulting number square is a magic square, as the sum of the numbers in any row or column, (or along the principal diagonal) is equal to 260.

For editors and proofreaders

Line breaks: prin¦ci|pal di¦ag|onal

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