User Joel David Hamkins - MathOverflow

Joel David Hamkins

Member for 13 years, 10 months
Last seen this week

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jdh.hamkins.org
University of Notre Dame

1,773 Answers

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374 votes

What are some reasonable-sounding statements that are independent of ZFC?

answered Nov 23, 2009 at 17:45

259 votes

What are the most misleading alternate definitions in taught mathematics?

answered Dec 6, 2009 at 3:25

233 votes

Accepted

Is the analysis as taught in universities in fact the analysis of definable numbers?

answered Oct 29, 2010 at 13:15

169 votes

Accepted

Solutions to the Continuum Hypothesis

answered May 19, 2010 at 2:55

166 votes

Most 'unintuitive' application of the Axiom of Choice?

answered Jul 15, 2011 at 13:12

145 votes

Accepted

Nontrivial theorems with trivial proofs

answered Jun 20, 2010 at 1:25

135 votes

Accepted

Reductio ad absurdum or the contrapositive?

answered Jan 20, 2010 at 9:37

135 votes

Has philosophy ever clarified mathematics?

answered Oct 1, 2014 at 6:29

135 votes

Accepted

Why do we have two theorems when one implies the other?

answered Jul 11, 2021 at 19:17

130 votes

What is a chess piece mathematically?

answered Dec 7, 2017 at 13:35

123 votes

The most outrageous (or ridiculous) conjectures in mathematics

answered Jan 17, 2017 at 20:08

112 votes

Examples of common false beliefs in mathematics

answered May 5, 2010 at 13:58

109 votes

Why worry about the axiom of choice?

answered Apr 29, 2010 at 3:37

105 votes

Theorems with unexpected conclusions

answered Mar 13, 2010 at 21:51

105 votes

Where to buy premium white chalk in the U.S., like they have at RIMS?

answered May 28, 2010 at 15:17

104 votes

Accepted

Have you solved problems in your sleep?

answered Apr 27, 2014 at 2:21

97 votes

Accepted

Adapting arguments and plagiarism

answered Apr 25, 2016 at 21:23

94 votes

Mistakes in mathematics, false illusions about conjectures

answered Jun 3, 2014 at 12:45

84 votes

Examples of eventual counterexamples

answered Jun 15, 2010 at 3:21

84 votes

Examples of common false beliefs in mathematics

answered May 4, 2010 at 21:12

84 votes

Has incorrect notation ever led to a mistaken proof?

answered Aug 9, 2018 at 18:01

82 votes

Value of "of course" in the mathematical literature

answered Feb 23, 2010 at 21:47

79 votes

Which mathematical ideas have done most to change history?

answered Feb 1, 2010 at 15:06

77 votes

What are some reasonable-sounding statements that are independent of ZFC?

answered Nov 23, 2009 at 17:56

75 votes

Accepted

Will this Turing machine find a proof of its halting?

answered Aug 4, 2022 at 0:37

72 votes

Nontrivial theorems with trivial proofs

answered Jun 20, 2010 at 1:16

70 votes

Can a problem be simultaneously polynomial time and undecidable?

answered Dec 2, 2010 at 11:00

69 votes

Accepted

What's wrong with the surreals?

answered Jun 24, 2010 at 3:40

68 votes

Jokes in the sense of Littlewood: examples?

answered Sep 16, 2010 at 12:51

67 votes

Proofs of the uncountability of the reals

answered Nov 22, 2010 at 18:27

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