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15
182
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T shaped tetris figures on a plane

Published on
#general-topology #geometry #set-theory #problem-solving #packing-problem
145
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Interpreting V=L

Published on
#set-theory
127
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$\kappa$-distributivity and Stone's Representation Theorem

Published on
#set-theory #boolean-algebra
275
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Have I proved in ZF $\aleph (X) \lt \aleph (\mathscr P^3(X))$?

Published on
#proof-verification #set-theory #axiom-of-choice
113
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Can sets be constructed in ZFC using possibly undecidable conditions?

Published on
#set-theory #incompleteness
56
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Solution verification: Writing a sum in the Cantor normal form

Published on
#sequences-and-series #proof-verification #set-theory #ordinals
392
Views

Application of Zorn's Lemma to linearly independent subsets of a vector space

Published on
#linear-algebra #set-theory
83
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Showing $\Gamma(\alpha\times\alpha)\leq\omega^\alpha$.

Published on
#set-theory #well-orders
197
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what is the cardinality (or algebraic dimension) of a hilbert space over a cardinal $\kappa$?

Published on
#set-theory #hilbert-spaces #cardinals
77
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An ordinal equipotent to a natural number is equal to that number

Published on
#set-theory #cardinals
707
Views

"A Simple Proof of Zorn's Lemma" article. (explanation of a step)

Published on
#set-theory #proof-explanation
247
Views

A Proof of Zorn's Lemma

Published on
#set-theory #proof-explanation
59
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Set of well-orderings of a given ordinal

Published on
#set-theory #ordinals
491
Views

Finding a basis of an infinite dimensional vector space with a given vector

Published on
#linear-algebra #set-theory #axiom-of-choice
357
Views

A particular class which satisfies all ZF axioms except for the axiom of infinity

Published on
#logic #set-theory #ordinals

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