Modular arithmetic: Difference between revisions

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Reverted 1 edit by Farkle Griffen (talk): This article is not about equivalence or congruence, it is about arithmetic, that is, operations in some number system. Moreover, a notation that is not always used is not convenient in a hatnote (many people use simply = after having stated they work in a quotient ring)
rv D.Lazard's good faith edit. That description is not helpful for the average reader (see talk page).
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{{short description|Computation modulo a fixed integer}}
{{About|computation modulothe "''{{mvar|a}} (mod fixed{{mvar|m}})''" integernotation|the binary operation ''mod({{mvar|a,m}})'' |modulo}}
[[File:Clock group.svg|thumb|upright=1.1|right|Time-keeping on this clock uses arithmetic modulo 12. Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12.]]