it's a hire car baby

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collatz-conjecture

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33

What's the closest approximation to $\pi$ using the digits $0-9$ only once?

Jan 3, 2018

12

Must a sequence be well-founded?

Sep 19, 2018

11

Write Occam's razor rigorously

Jul 28, 2017

9

What's $-\frac{1}{27}$ in the p-adic ring $\Bbb Z_2$?

Oct 11, 2019

7

Show $f(x)=1-\frac{1}{x\left(\lvert x\rvert_2\right)}$ converges on $0$ in finite steps

Mar 10, 2017

Answers

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40

Simple theorems that are instances of deep mathematics

Apr 6, 2017

20

Does multiplying all a number's roots together give a product of infinity?

Jul 13, 2016

15

Is "you know everything" the (using sentential logic) logical negation of "you know nothing"?

Aug 5, 2016

10

Verify my understanding of a math joke.

Aug 12, 2016

10

In how many ways can we roll a red die, a yellow die, and a black die, and get a sum of $9$?

Feb 8, 2017

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+20

What pair of rectangle shapes is exchanged by cutting off a square?

+10

Is $(2x-1)/3$ a homeomorphism on $\Bbb Z_2$? And does it expand or contract?

+10

Find the other fixed point of this 2-adic isometry

+10

In what topological space does the sum of the natural numbers equal minus one twelfth?

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