Ken Stewart
Contributor
Ken Stewart is a retired educator of 31 years, with an honours degree in chemistry, physics, and mathematics. He brings extensive experience as a contributor to Encyclopædia Britannica from his many years of developing multiple resources for several major publishing companies worldwide, both in print and in online platforms.
Primary Contributions (32)
Invertible matrix, a square matrix such that the product of the matrix and its inverse generates the identity matrix. That is, a matrix M, a general n × n matrix, is invertible if, and only if, M ∙ M−1 = In, where M−1 is the inverse of M and In is the n × n identity matrix. Often, an invertible…
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