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Top Questions
8
votes
How to enable 3-finger drag in Catalina?
macos
catalina
asked Oct 11, 2019 at 10:36
apple.stackexchange.com
7
votes
If for metric space $(X,d)$ we have $d(A,B)>0$ for any pair of non empty closed disjoint subsets $A$ and $B$. Show that $(X,d)$ is complete.
real-analysis
general-topology
metric-spaces
asked Oct 28, 2019 at 16:56
math.stackexchange.com
6
votes
In how many ways can we arrange the English alphabet so that exactly $10$ of the letters lie between $A$ and $Z$?
combinatorics
permutations
asked Oct 31, 2019 at 19:53
math.stackexchange.com
6
votes
Proof verification : $\mathbb{Q}$ is countable
proof-verification
elementary-set-theory
asked Sep 11, 2019 at 19:45
math.stackexchange.com
Top Answers
22
How to enable 3-finger drag in Catalina?
apple.stackexchange.com
9
Positive definite matrix must be Hermitian
math.stackexchange.com
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