How do we call a matrix that has inverse matrix in english?

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Answer 1 · 2018-01-10T14:08:14

A matrix with inverse is called an invertible matrix.

If a matrix #M# has an inverse, then we typically denote that matrix by #M^(-1)#.

Analogously the multiplicative inverse of a number #x# can be written #x^(-1)# or #1/x# - the result of inverting #x/1#, i.e. turning it upside down.

So we call a matrix with multiplicative inverse invertible.

Answer 2 · 2018-01-10T14:18:15

See explanation.

According to Wikipedia you can call such matrix: invertible, nonsingular or nondegenerate.