Amit Kumar Gupta

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Name	Amit Kumar Gupta
Member for	2 years
Seen	6 hours ago
Website	math.berkeley.edu/~akgupta
Location	Berkeley, CA
Age	28

Graduate student in set theory at UC Berkeley

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51

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Good ways to engage in mathematics outreach?

soft-question mathematics-education advice

jan 3 11 at 16:10 Tim Porter 3,735●6●14

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45

votes

9

answers

8k

views

Solutions to the Continuum Hypothesis

set-theory lo.logic

oct 28 at 5:45 none 1●1

15

34

votes

4

answers

3k

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Does the fact that this vector space is not isomorphic to its double-dual require choice?

axiom-of-choice linear-algebra

apr 5 12 at 9:56 Asaf Karagila 7,198●1●14●44

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25

votes

6

answers

2k

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Is the non-triviality of the algebraic dual of an infinite-dimensional vector space equivalent to the axiom of choice?

axiom-of-choice set-theory linear-algebra dual-pairs lo.logic

oct 29 11 at 0:10 Asaf Karagila 7,198●1●14●44

10

16

votes

0

answers

369

views

Density of first-order definable sets in a directed union of finite groups

gr.group-theory lo.logic combinatorial-group-theor pr.probability finite-groups

nov 4 10 at 5:56 Gene S. Kopp 1,408●6●19

4

16

votes

3

answers

1k

views

Cohen reals and strong measure zero sets

set-theory lo.logic

mar 9 at 15:30 Juris Steprans 2,338●4●13

4

15

votes

2

answers

532

views

How “much” does (Grigorieff) forcing destroy an ultrafilter?

ultrafilters forcing set-theory

may 31 11 at 15:43 Peter Krautzberger 413●3●12

7

15

votes

1

answer

890

views

Martin’s “Philosophical Issues about the Hierarchy of Sets”

set-theory foundations math-philosophy lo.logic

apr 30 11 at 16:14 Marc Alcobé García 979●2●12

5

15

votes

0

answers

483

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Can there be an embedding j:V to L, from the set-theoretic universe V to the constructible universe L, when V not= L?

lo.logic set-theory large-cardinals

jul 10 at 3:32 Joel David Hamkins 74.9k●7●187●343

9

13

votes

2

answers

806

views

Why does inner model theory needs so much descriptive set theory (and vice versa)?

set-theory descriptive-set-theory large-cardinals

jan 15 12 at 14:28 François G. Dorais♦ 22.4k●2●48●113

4

11

votes

1

answer

505

views

Impact of discrepancy between Kunen’s and Jech’s definition of iterated forcing on full support iterations

set-theory forcing

mar 11 11 at 16:46 Stefan Geschke 10.5k●1●14●37

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11

votes

6

answers

1k

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Examples of ZFC theorems proved via forcing

set-theory forcing big-list

mar 9 11 at 1:12 Justin Moore 3,051●11●22

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11

votes

2

answers

668

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Indecomposable vector spaces and the axiom of choice

set-theory axiom-of-choice linear-algebra

may 8 11 at 11:25 Clinton Conley 1,326●6●8

3

10

votes

4

answers

966

views

How to decompose an infinite set into two isomorphic ones without choice?

set-theory

may 1 11 at 19:38 Andreas Blass 32.9k●4●54●109

6

10

votes

3

answers

807

views

Games that never begin

descriptive-set-theory set-theory

nov 13 at 13:51 Joel David Hamkins 74.9k●7●187●343