Algebraic structures | Matrices | Field (mathematics)

Matrix field

In abstract algebra, a matrix field is a field with matrices as elements. In field theory there are two types of fields: finite fields and infinite fields. There are several examples of matrix fields of different characteristic and cardinality. There is a finite matrix field of cardinality p for each prime p. One can find several finite matrix fields of characteristic p for any given prime number p. In general, corresponding to each finite field there is a matrix field. Since any two finite fields of equal cardinality are isomorphic, the elements of a finite field can be represented by matrices. Contrary to the general case for matrix multiplication, multiplication is commutative in a matrix field (if the usual operations are used). Since addition and multiplication of matrices have all needed properties for field operations except for commutativity of multiplication and existence of multiplicative inverses, one way to verify if a set of matrices is a field with the usual operations of matrix sum and multiplication is to check whether 1. * the set is closed under addition, subtraction and multiplication; 2. * the neutral element for matrix addition (that is, the zero matrix) is included; 3. * multiplication is commutative; 4. * the set contains a multiplicative identity (note that this does not have to be the identity matrix); and 5. * each matrix that is not the zero matrix has a multiplicative inverse. (Wikipedia).

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From playlist Linear Algebra for Computer Scientists

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From playlist Intro to Matrices

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From playlist Introducing linear algebra

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From playlist Advanced Calculus / Multivariable Calculus

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From playlist Calculus 3

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From playlist Field Theory

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From playlist Integration and Vector Fields

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From playlist Mathematics

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From playlist UT El Paso: CEM Lectures | CosmoLearning.org Electrical Engineering

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From playlist RubyConf 2015

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From playlist MIT 8.421 Atomic and Optical Physics I, Spring 2014

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From playlist Calculus 3 (Full Length Videos)

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Galois theory | Algebraic structure | Finite field | Closure (mathematics) | Matrix exponential | Infinite set | Isomorphism | Identity element | Identity matrix | Matrix ring | Zero matrix | Euler's identity | Characteristic (algebra) | Set (mathematics) | Commutative property | Field (mathematics) | Real number | Prime number | Abstract algebra | Complex number | Matrix multiplication | Cardinality | Matrix (mathematics) | Multiplicative inverse