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Mathematics
Mikhail Katz's user avatar
Mikhail Katz's user avatar
Mikhail Katz's user avatar
Mikhail Katz
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139
If it took 10 minutes to saw a board into 2 pieces, how long will it take to saw another into 3 pieces?
May 20, 2013
135
Is $\frac{\textrm{d}y}{\textrm{d}x}$ not a ratio?
Aug 12, 2013
89
What seemingly innocuous results in mathematics require advanced proofs?
Aug 15, 2017
38
If a compact set is covered by a finite union of open balls of same radii, can we always get a lesser radius?
Jan 22, 2018
35
Is mathematical history written by the victors?
Jul 16, 2013
33
Is there a matrix $A$ such that for every other matrix $B$, we have $\mbox{tr}(AB) = 0$?
May 17, 2018
31
What does it mean for a set to have Lebesgue measure zero?
Oct 25, 2017
29
Are infinitesimals dangerous?
Feb 3, 2014
25
What is the use of hyperreal numbers?
Jun 23, 2016
22
Difference between completeness and compactness
Dec 30, 2015
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45
Situation with Artemov's paper?
41
Did Euler prove theorems by example?
38
What are the advantages of the more abstract approaches to nonstandard analysis?
35
What is... a grossone?
32
Breakthroughs in mathematics in 2023