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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.

Filters (None)
71%
+3 −0
Is there a $(n_3)$ configuration which is not self-dual?

1 answer  ·  posted 2mo ago by WheatWizard‭  ·  last activity 2mo ago by Peter Taylor‭

28%
+0 −3
What are the Peano axioms?

0 answers  ·  posted 7d ago by Julius H.‭

66%
+2 −0
42%
+1 −2
Picture proof for expansion of $x^n−y^n$

2 answers  ·  posted 6mo ago by Este‭  ·  last activity 6mo ago by Peter Taylor‭

37%
+1 −3
37%
+1 −3
60%
+1 −0
66%
+2 −0
60%
+1 −0
Using convexity in the proof of Hölder’s inequality

1 answer  ·  posted 1mo ago by Snoopy‭  ·  last activity 1mo ago by Snoopy‭

57%
+2 −1
66%
+2 −0
The purpose of logical frameworks in specifying type theories

1 answer  ·  posted 11mo ago by user205‭  ·  last activity 11mo ago by Derek Elkins‭

50%
+0 −0
66%
+2 −0
On Tarski-style universes in type theory

1 answer  ·  posted 11mo ago by user205‭  ·  last activity 11mo ago by Derek Elkins‭

60%
+1 −0
60%
+1 −0
The derivatives of a function at a boundary point

1 answer  ·  posted 1mo ago by tommi‭  ·  last activity 1mo ago by Snoopy‭

60%
+1 −0
The meaning of $\pm$

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

44%
+2 −3
Cyclical or “loop” fractals?

1 answer  ·  posted 12d ago by Julius H.‭  ·  last activity 11d ago by r~~‭

50%
+0 −0
Universal property of quotient spaces

2 answers  ·  posted 1y ago by Snoopy‭  ·  last activity 10mo ago by ronno‭

70%
+5 −1
60%
+1 −0
matrix inverse of $I + A$ where $A$ is skew-symmetric

1 answer  ·  posted 3d ago by Trevor‭  ·  last activity 27m ago by Trevor‭

60%
+1 −0
Dividing a cuboid in four

1 answer  ·  posted 1y ago by Yair Rand‭  ·  last activity 1y ago by Peter Taylor‭

77%
+5 −0
28%
+0 −3
What is a dual object? [closed]

0 answers  ·  posted 4d ago by Julius H.‭  ·  closed 3d ago by Peter Taylor‭