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Mathematics
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Vercingetorix's user avatar
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Vercingetorix
  • Member for 3 years, 10 months
  • Last seen more than 1 year ago
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question
7
Probability that of $5$ cards drawn from a shuffled deck the 1st, 3rd and 5th will be the same suit.
Jan 8, 2023
answer
5
Prove that $d(A,B)=d(x,y).$
Nov 14, 2020
answer
5
Show $a^2+b^2+c^2 \equiv 0 \pmod {3}$ if $a, b, c$ are *not* multiples of $3$.
Nov 14, 2022
answer
4
Let E, F be disjoint and closed sets, with at least one of them compact. Show that d (E, F)> 0
Jul 15, 2021
answer
4
Showing a set is Borel and a function is Borel measurable.
Feb 14, 2021
answer
4
How to check if two finite lines touches?
Jun 28, 2022
answer
4
Please help with this basic combinatorics problem
Nov 21, 2022
answer
4
If an orthogonal matrix represents a reflection, show that it is symmetric.
Nov 15, 2022
answer
4
Suppose that $g: A \rightarrow B$, $h: B \rightarrow C$. Prove that if $g$ is onto and $h$ is not one-to-one, then $h \circ g$ is not one to one.
Nov 26, 2020
answer
4
Suppose $R$ is a commutative ring and $RR= R$(ideal multiplication). Then, $R$ has an identity.
Oct 27, 2022