= Abstract algebra
<Abstract algebra> studies <algebraic structures> through their operations and axioms, including <groups>, <rings>, <fields>, and <modules>. Instead of proving a calculation separately for every example, it identifies which structural properties make the argument work.
For instance, a <group> can consist of permutations, spatial symmetries, or invertible <matrices>. A result using only <associativity>, an <identity element>, and <inverse elements> applies to all three. <Homomorphisms> compare structures by preserving their operations, while <quotient structures> encode relations and identify elements in a controlled way.
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