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Pronunciation varies by accent · adjective
(of a matrix) Having nonzero entries along the main diagonal, the three diagonals on either side of the main diagonal, and the three diagonals near each corner, only..
Use heptadiagonal when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Heptadiagonal means (of a matrix) Having nonzero entries along the main diagonal, the three diagonals on either side of the main diagonal, and the three diagonals near each corner, only..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use heptadiagonal where its definition matches the intended context.
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