invertible matrix

Noun

 * 1)  Any n×n square matrix for which there exists a corresponding inverse matrix (i.e., a second (or possibly the same) matrix such that when the two are multiplied by each other, in either order, the result is the n×n identity matrix).
 * 2) * 1975 [Prentice-Hall], Kenneth Hoffman, Analysis in Euclidean Space, Dover, 2007, page 65,
 * It says that, if A is a singular matrix, then every neighborhood of A contains an invertible matrix. In other words, if A is singular, we can perturb A just a little and obtain an invertible matrix.

Translations

 * Finnish: kääntyvä matriisi
 * German: invertierbare Matrix, reguläre Matrix
 * Hungarian:
 * Italian: matrice invertibile
 * Japanese:
 * Polish: macierz odwrotna
 * Romanian: matrice inversabilă
 * Swedish: inverterbar matris