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porton

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825 reputation
211
bio website mathematics21.org
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visits member for 2 years, 5 months
seen 11 hours ago
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An amateur general topology researcher.
825 reputation
 bio website mathematics21.org visits member for 2 years, 5 months
211 badges
 location seen 11 hours ago
summary answers questions tags badges favorites bounties reputation activity

17 Answers

newest activity votes
3
Which one result in maths has surprised you the most?
2
Currying for dependent functions
1
Alternative definition for topological spaces?
0
Applications of ultrafilters
0
Closure induced by a proximity corresponds to a topology
0
Equivalence of neighborhood systems and preclosures (proof needed)
0
Does an isomorphism induce an order isomorphism?
0
From an equality to a comparison
0
A sufficient condition for order isomorphism of posets?
0
Construct a new relation from several relations
-1
How is it called a minimal morphism of category Rel?
-1
Find an elegant proof of a set-theoretic equiality about relations
-2
Order of products and order of multipliers
-2
How to formulate a theorem about bijections between several sets
-4
Concatenating an infinite number of arguments
-4
Infinite associativity condition
-5
A counter-example for a set-theoretic problem?
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