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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.

30%
+1 −5
75%
+4 −0
Optimising a 3 value problem (well 2 really)

1 answer  ·  posted 10mo ago by KalleMP‭  ·  last activity 10mo ago by Peter Taylor‭

83%
+8 −0
Complex numbers in 2D, quaternions in 4D, why nothing in 3D?

2 answers  ·  posted 12mo ago by Fred Wamsley‭  ·  last activity 10mo ago by Derek Elkins‭

60%
+1 −0
How $ijk=\sqrt{1}$?

2 answers  ·  posted 1y ago by deleted user  ·  last activity 10mo ago by Tim Pederick‭

80%
+6 −0
60%
+1 −0
71%
+3 −0
Matrices with rotational symmetry

1 answer  ·  posted 11mo ago by Peter Taylor‭  ·  last activity 11mo ago by Peter Taylor‭

50%
+0 −0
50%
+0 −0
Sample skewness consistency [closed]

0 answers  ·  posted 1y ago by Guilherme Costa‭  ·  closed 1y ago by Peter Taylor‭

71%
+3 −0
75%
+4 −0
Missing a solution: Are A and B always equal if A-B=0

3 answers  ·  posted 1y ago by re89j‭  ·  last activity 1y ago by tommi‭

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

3 answers  ·  posted 1y ago by DNB‭  ·  edited 1y ago by Quintec‭

50%
+0 −0
71%
+3 −0
50%
+1 −1
50%
+1 −1
Acceptable, usual to write $\ge 2$ pipes simultaneously?

1 answer  ·  posted 1y ago by DNB‭  ·  last activity 1y ago by Derek Elkins‭

71%
+3 −0
33%
+0 −2
33%
+0 −2
How do mathematicians measure area for points?

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

40%
+0 −1
60%
+1 −0
What does upper indices represent?

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

50%
+0 −0
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

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