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Q&A

General Q&A about all branches of theoretical and applied mathematics, including closely-adjacent sciences where the central question is about the math.

75%
+4 −0
Missing a solution: Are A and B always equal if A-B=0

3 answers  ·  posted 10mo ago by re89j‭  ·  last activity 10mo ago by tommi‭

40%
+0 −1
60%
+1 −0
How's it possible to arrange 0 objects? How can 0! = 1?

3 answers  ·  posted 11mo ago by DNB‭  ·  edited 11mo ago by Quintec‭

50%
+0 −0
71%
+3 −0
Are we in a "history-valley" for Topology?

2 answers  ·  posted 11mo ago by whybecause‭  ·  last activity 11mo ago by Derek Elkins‭

50%
+1 −1
In general, does $\color{forestgreen}{P(A|M)} + \color{red}{P(B|M)} = 1$?

1 answer  ·  posted 12mo ago by DNB‭  ·  last activity 11mo ago by whybecause‭

50%
+1 −1
Acceptable, usual to write $\ge 2$ pipes simultaneously?

1 answer  ·  posted 12mo ago by DNB‭  ·  last activity 11mo ago by Derek Elkins‭

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33%
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33%
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How do mathematicians measure area for points?

1 answer  ·  posted 1y ago by deleted user  ·  last activity 12mo ago by zavier‭

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60%
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What does upper indices represent?

2 answers  ·  posted 1y ago by deleted user  ·  last activity 12mo ago by r~~‭

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What is the parallel for edges?

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by r~~‭

33%
+2 −6
Can we add without using addition?

3 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by DavidCary‭

28%
+0 −3
57%
+2 −1
Third kind of infinite

1 answer  ·  posted 1y ago by Estela‭  ·  last activity 1y ago by r~~‭

28%
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50%
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66%
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60%
+1 −0
What it ≡ called?

1 answer  ·  posted 1y ago by Anonymous‭  ·  last activity 1y ago by Quintec‭

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71%
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