Matrices pp 31-68

# Square Matrices

Chapter
Part of the Graduate Texts in Mathematics book series (GTM, volume 216)

## Abstract

The essential ingredient for the study of square matrices is the determinant. For reasons given in Section 3.5, as well as in Chapter 9, it is useful to consider matrices with entries in a ring. This allows us to consider matrices with entries in(rational integers) as well as in K[X] (polynomials with coefficients in K).We assume that the ring of scalars A is a commutative (meaning that the multiplication is commutative) integral domain (meaning that it does not have divisors of zero: ab=0 implies either a = 0 or b = 0), with a unit denoted by 1, that is, an element satisfying 1x = x1 = x for every x ∈≤ A.

## Keywords

Characteristic Polynomial Integral Domain Triangular Matrix Minimal Polynomial Simple Eigenvalue
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