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What concept of order is introduced in the twentyfold way?

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#combinatorics #discrete-mathematics #relations #order-theory #equivalence-relations
38
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Question on equivalence classes in a relation

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#abstract-algebra #relations #equivalence-relations
86
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Multiple-select question on chinese remainder theorem

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#abstract-algebra #elementary-number-theory #relations #chinese-remainder-theorem
65
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Does every infinite graph contain a maximal clique?

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#graph-theory #relations #infinite-graphs
337
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Combinatorics With Relations

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#combinatorics #number-theory #functions #discrete-mathematics #relations
184
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Questions about relation composition and equivalence relation

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#relations #equivalence-relations #function-and-relation-composition
33
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'Product' relation construction

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#elementary-set-theory #relations #product-space
225
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Writing out a (set) relation in terms of predicate logic

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#elementary-set-theory #logic #solution-verification #relations #predicate-logic
248
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Find all minimal and maximal elements of $B$

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#elementary-set-theory #solution-verification #relations
94
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Is there a way to make Zorn's lemma applicable when the upper bound property *just* fails, due to a "constant" chain?

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#relations #order-theory #equivalence-relations #quotient-spaces
52
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If $f: \mathbb{Z} × \mathbb{N} \to \mathbb{Z}, f(x,y)=x^2+y$. Prove if is an injection and prove if is an surjection.

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#functions #discrete-mathematics #relations
866
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Is a relation that is purely reflexive also symmetric?

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#relations
53
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Is a relation defined by an emptyset symmetric and transitive?

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#relations
211
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Number of Relations that satisfy a condition

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#relations
1k
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Is it possible to reverse engineer a function?

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#functions #relations

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