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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.

50%
+1 −1
40%
+0 −1
Notation for Euclidean Norm

1 answer  ·  posted 1y ago by Guilherme Costa‭  ·  last activity 1y ago by tommi‭

80%
+6 −0
How to show if a set is simply connected?

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

60%
+1 −0
proving relative lengths on a secant

1 answer  ·  posted 1y ago by msh210‭  ·  last activity 1y ago by Peter Taylor‭

57%
+2 −1
difference between quotient rule and product rule

3 answers  ·  posted 1y ago by deleted user  ·  last activity 1y ago by msh210‭

18%
+0 −7
75%
+4 −0
71%
+3 −0
Intuitively, why's X% of Y = Y% of X?

1 answer  ·  posted 2y ago by Chgg Clou‭  ·  last activity 2y ago by celtschk‭

66%
+2 −0
Why aren't $z_1=f(xy)$ and $z_2=f(x/y)$ functions of 2 variables?

1 answer  ·  posted 2y ago by TextKit‭  ·  last activity 2y ago by celtschk‭

44%
+2 −3
57%
+2 −1
50%
+0 −0
50%
+2 −2
83%
+8 −0
Classification of topological points

1 answer  ·  posted 2y ago by celtschk‭  ·  last activity 2y ago by Ezekiel‭

71%
+3 −0
Cutting the square

0 answers  ·  posted 2y ago by Grove‭  ·  edited 2y ago by Grove‭

75%
+4 −0
In $P(X\leq q)$, what do we call $q$?

1 answer  ·  posted 2y ago by anoldmaninthesea‭  ·  last activity 2y ago by gramps‭

75%
+4 −0
80%
+6 −0
Why always rationalize a denominator?

3 answers  ·  posted 2y ago by msh210‭  ·  last activity 2y ago by Derek Elkins‭

44%
+2 −3
80%
+6 −0
71%
+3 −0
Method to calculate the area of a cyclic n-gon

0 answers  ·  posted 2y ago by Razetime‭  ·  edited 2y ago by Razetime‭

75%
+4 −0
Using maximum of forecasted values to forecast maximum

1 answer  ·  posted 2y ago by Guilherme Costa‭  ·  last activity 2y ago by Stephan Kolassa‭

77%
+5 −0
Which of the multiple definitions of correlation to use?

0 answers  ·  posted 2y ago by Mithrandir24601‭  ·  last activity 2y ago by r~~‭

80%
+6 −0
Discrete data: Graphs and skewness

2 answers  ·  posted 2y ago by Nezar ‭  ·  last activity 2y ago by 1muflon1‭

40%
+0 −1
Existence of a set of all sets

2 answers  ·  posted 2y ago by MathPhysics‭  ·  last activity 2y ago by Derek Elkins‭

77%
+5 −0
Similar triangles with the same area

2 answers  ·  posted 2y ago by msh210‭  ·  last activity 2y ago by DonielF‭

71%
+3 −0
Asymptotics of counting integers by prime signature

1 answer  ·  posted 2y ago by Peter Taylor‭  ·  last activity 2y ago by Derek Elkins‭