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Comparability theorem for well ordered sets using transfinite recursion

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#elementary-set-theory #solution-verification #order-theory #well-orders #transfinite-recursion
95
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Show the existence of a sorting function

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#elementary-set-theory #permutations #order-theory #monotone-functions #sorting
61
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Measurability of minimum with respect to lexicographic order

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#real-analysis #measure-theory #order-theory #measurable-functions
131
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Order-preserving surjective maps between finite linear orders

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#combinatorics #order-theory #simplicial-stuff
68
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Useful bounds for mobius function of a poset

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#combinatorics #order-theory
62
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Let $G$ be a group and $g\in G$. Prove or Disprove: If $o(g^2)=2$ then $o(g)=4$.

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#group-theory #order-theory
61
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Big-O notation for a function $f(x)$ that tends $\infty$ as $x \rightarrow \infty$ at an arbitrarily small rate?

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#limits #order-theory #computational-complexity
57
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Question related to Suslin Problem

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#set-theory #order-theory
151
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Proof of Bourbaki's Fixed Point Theorem

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#elementary-set-theory #set-theory #order-theory #fixed-point-theorems
63
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Why is this sum over graphs equal to the Möbius function of the poset of partitions?

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#combinatorics #order-theory
38
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How is the dual notion of an extensive map called?

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#terminology #order-theory #lattice-orders
60
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Relation between a fixed point and being a well-order

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#elementary-set-theory #order-theory #fixed-point-theorems #fixed-points #well-orders
120
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Question on improving a Suslin line in Kunen's book

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#general-topology #set-theory #order-theory
59
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Finding the supremum and the infimum of given set as follows.

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#elementary-set-theory #solution-verification #order-theory
58
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Boolean algebra of a certain size containing filter

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#set-theory #order-theory #boolean-algebra #filters #large-cardinals

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