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下三角行列 (shitasankakugyouretsu) Japanese meaning | Kotomora

下した三さん角かく行ぎょう列れつ

し

た

さ

ん

か

く

ぎょ

う

れ

つ

Meanings

1

lower triangular matrix

A square matrix where all entries above the main diagonal are zero. Used in linear algebra.

下した三さん角かく行ぎょう列れつの行ぎょう列れつ式しきは対たい角

かく

成せい

分ぶん

の

積せき

に

等ひと

しい

。

The determinant of a lower triangular matrix equals the product of its diagonal entries.

Kanji

下below, down, descend
三three
角angle, corner, square
行going, journey, carry out
列file, row, rank

Related words

上うえ三さん角かく行ぎょう列れつ
上三角行列 is an upper triangular matrix, where entries below the main diagonal are zero, while 下三角行列 has zeros above the diagonal.
三さん角かく行ぎょう列れつ
三角行列 is a general triangular matrix; 下三角行列 specifically refers to the lower triangular case.

Built from

下した+三さん

Etymology

Compound of 下 (lower) + 三角 (triangle) + 行列 (matrix). A straightforward technical term from linear algebra.

角かく

行ぎょう

列れつ