User ar.grig - MathOverflow

ar.grig

Member for 7 years
Last seen more than a month ago

Armenia

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1,133

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8

answers

20

questions

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5

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Yearling

× 5

Dec 9, 2022

10

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Tumbleweed

Mar 27, 2019
Curious

Mar 3, 2019
Commentator

May 13, 2018

Top tags

set-theory

8

Score

21

Posts

75

Posts %

ultrafilters

6

Score

18

Posts

64

Posts %

filters

5

Score

10

Posts

36

Posts %

infinite-combinatorics

3

Score

9

Posts

32

Posts %

real-analysis

0

Score

5

Posts

18

Posts %

real-analytic-structures

0

Score

3

Posts

11

Posts %

Top posts

View all questions and answers

12

Selective ultrafilter and bijective mapping

Feb 27, 2019

11

Existence of subset of reals such that any real number is unique sum of exactly two elements of the subset

May 12, 2018

7

Ultrafilter on the ordinal $\omega^\omega$

Jan 27, 2020

6

Permutation on $\omega$ and Ramsey ultrafilter

Dec 9, 2017

6

On infinite combinatorics of ultrafilters

Mar 2, 2019

5

Club filter basis in $\omega_1$

Nov 15, 2019

4

The example of the idempotent filter or subsets family with finite intersections property

Mar 7, 2019

4

The property of the dense subfilter of a selective ultrafilter

Mar 21, 2019

4

Function on the set of limit countable ordinals

Apr 24, 2019

4

On a completeness property of hyperreals

Aug 21, 2021