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# Formulas & Propositions on ALGEBRA(Michael Artin 2nd edition)

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1. Matrices
2. Groups
1. Laws of Composition
2. Groups and Subgroups
• The order of a group G, denote as |G| is the number of elements that it contains.
• Some infinite abelian group
• Proposition: groups hold for Cancellation Law
• n by n general linear group is the group of all invertible n by n matrices, denoted by :

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