Pivot

Noun, (verb - see below)

Pronunciation
/'pɪvət/ listen

Synonym
Pivot element

Meaning
A pivot is an element on the left-hand side of a matrix for solving a system of linear equations using the Gaussian elimination that you want the elements above and below to be zero.

Example
The green 3 is a pivot. The aim is to make yellow numbers into zero.



Similar words
To pivot      /'pɪvət/           verb        to make an element above or below a leading one into a zero
Pivoting      /'pɪvətɪŋ/       noun       a process of  making an element above or below a leading one into zero

Etymology
Middle French, French pivot, hinge (1338; 1174–78 in figurative use in the name of a dance), vertical main root of a fruit tree (1651), officer around whom troops wheel (1752)

Source:
OED

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