Profile Activity

Unknown

Reputation

2,409

2.4k
2.1k
1.8k

2016
2017
2018
2019

Top tag

reference-request

Next privilege

2,500 Rep.

Create tag synonyms

Badges

Newest

Famous Question

Next badge

0/1

Impact

4 posts edited

0 helpful flags

2,549 votes cast

Summary Answers Questions Tags Badges Favorites Bounties Reputation All actions

27 Questions

Views Newest Activity Votes

votes

answers

48k

views

Open problems with monetary rewards

open-problems

Oct 30 at 19:08 Peđa Terzić 601

votes

answers

10k

views

Proofs of the uncountability of the reals.

Apr 6 at 20:04 Sandra 41

votes

answers

11k

views

Is there any geometry where the triangle inequality fails?

mg.metric-geometry big-list

Oct 10 at 19:20 kodlu 6,171

votes

answers

views

Is this 1974 claim still valid?

differential-equations existence-theorems

Feb 5 '11 at 9:23 Unknown 2,409

votes

answers

views

Prime/undecomposable matrices

linear-algebra nt.number-theory reference-request

Aug 14 at 6:13 Wlod AA 1,671

votes

answer

890

views

Transcendental numbers: yet another classification

transcendental-number-theory set-theory

Mar 30 '11 at 12:02 Emil Jeřábek supports Monica 31.6k

votes

answers

views

Can we have A={A} ?

set-theory lo.logic examples

Dec 26 '13 at 4:26 Flash Sheridan 565

votes

answer

479

views

A partial converse to Bertrand's Postulate

nt.number-theory prime-numbers

Mar 13 '11 at 11:12 GH from MO 66.4k

votes

answers

views

The unprecedented success of the “intersection” operator

set-theory big-picture intuition

Aug 6 '10 at 16:40 Unknown 2,409

votes

answer

808

views

Reconstruction Conjecture: Group theoretic formulation

reference-request gr.group-theory graph-theory open-problems graph-reconstruction

Dec 20 '15 at 17:55 Dag Oskar Madsen 2,867

votes

answers

views

Non-isomorphic graphs of given order.

graph-theory enumerative-combinatorics co.combinatorics algorithms

Sep 26 '10 at 15:37 Community♦ 1

votes

answer

views

Unsolved problems concerning Artinian Rings and Artinian Modules

ac.commutative-algebra open-problems reference-request

Apr 9 '11 at 5:24 Community♦ 1

votes

answer

520

views

The minimal Goldbach basis

nt.number-theory prime-numbers goldbach-type-problems

Feb 8 '11 at 20:19 Aaron Meyerowitz 26.4k

votes

answers

views

Less-known conjectures of significant influence and the contrary

soft-question ho.history-overview mathematics-education

Jun 22 '10 at 20:30 Charles Matthews 11.9k

votes

answers

views

Fundamental theorems [closed]

big-list

May 20 '10 at 17:37 HJRW 19.3k

votes

answers

views

'Sign matrices'-(-1,+1) square matrices

matrices reference-request

Apr 11 '16 at 3:44 Community♦ 1

votes

answer

views

Isomorphism and number of subgroups

gr.group-theory graph-theory

Sep 4 '10 at 17:34 Community♦ 1

votes

answers

774

views

From power series to differential equations

power-series differential-equations

Dec 27 '10 at 11:39 Unknown 2,409

votes

answer

751

views

Ethio Integers?

nt.number-theory terminology

Jun 13 '10 at 14:14 Gjergji Zaimi 69.5k

votes

answer

views

Websites hosting free math ebooks. [duplicate]

mathematics-education big-list books

Jun 12 '10 at 19:52 Community♦ 1

votes

answers

271

views

The X-series (for groups)

gr.group-theory finite-groups

Jul 21 '18 at 9:21 Martin Sleziak 3,910

-1

votes

answers

views

Transcription of a panel discussion about G.Perelman

translation ho.history-overview

Sep 4 '10 at 18:33 Community♦ 1

-1

votes

answer

714

views

Taming this Conway-type sequence

nt.number-theory sequences-and-series reference-request

Aug 10 '10 at 6:24 Community♦ 1

-1

votes

answer

671

views

List of sites related to the Riemann Hypothesis and recent developments?

big-list

May 15 '10 at 14:55 Willie Wong 22.1k

-2

votes

answer

views

Unpopular “elementary” theorems/identities to impress an audience of mathematicians. [closed]

big-list gm.general-mathematics

Jan 3 '11 at 20:05 Otis Chodosh 4,252

-3

votes

answer

views

Are there infinitely many equivalence classes of similar matrices? [closed]

linear-algebra

Jun 10 '10 at 20:08 Unknown 2,409

-3

votes

answers

views

Factorizing polynomials of several variables (in a different perespective)

polynomials nt.number-theory ag.algebraic-geometry linear-algebra reference-request

Jun 10 '10 at 15:05 Unknown 2,409

Stack Exchange Network

current community

your communities

more stack exchange communities

Next privilege

Next badge

27 Questions

Open problems with monetary rewards

Proofs of the uncountability of the reals.

Is there any geometry where the triangle inequality fails?

Is this 1974 claim still valid?

Prime/undecomposable matrices

Transcendental numbers: yet another classification

Can we have A={A} ?

A partial converse to Bertrand's Postulate

The unprecedented success of the “intersection” operator

Reconstruction Conjecture: Group theoretic formulation

Non-isomorphic graphs of given order.

Unsolved problems concerning Artinian Rings and Artinian Modules

The minimal Goldbach basis

Less-known conjectures of significant influence and the contrary

Fundamental theorems [closed]

'Sign matrices'-(-1,+1) square matrices

Isomorphism and number of subgroups

From power series to differential equations

Ethio Integers?

Websites hosting free math ebooks. [duplicate]

The X-series (for groups)

Transcription of a panel discussion about G.Perelman

Taming this Conway-type sequence

List of sites related to the Riemann Hypothesis and recent developments?

Unpopular “elementary” theorems/identities to impress an audience of mathematicians. [closed]

Are there infinitely many equivalence classes of similar matrices? [closed]

Factorizing polynomials of several variables (in a different perespective)