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

367 posts RSS
Activity Age Score Random
Filters (None)
44%
+2 −3
Intuitively, what does the 1 mean in $\dfrac{a}{b} = \dfrac{1}{\frac{b}{a}}$?

2 answers  ·  posted 4y ago by Chgg Clou‭  ·  last activity 4y ago by nalply‭

intuition
66%
+2 −0
Disentangling Machine Learning Theory with Cross-Validation

0 answers  ·  posted 4y ago by seth.wagenman‭

model
89%
+15 −0
Why does the decimal expansion of $1/(10n - 1)$ have this neat pattern?

3 answers  ·  posted 4y ago by The Amplitwist‭  ·  last activity 4y ago by celtschk‭

number-theory high-school-mathematics
75%
+4 −0
Proving the Equation of the Pencil of Two Intersecting Circles

1 answer  ·  posted 4y ago by TripleFault‭  ·  last activity 4y ago by msh210‭

high-school-mathematics pencil conics proof circle
80%
+6 −0
The probability distribution of rolling $n$ dice and keeping $k$ highest

1 answer  ·  posted 4y ago by tommi‭  ·  last activity 4y ago by Peter Cooper Jr.‭

probability dice
57%
+2 −1
Equation of a line given some parametrized points on it and an area

1 answer  ·  posted 4y ago by msh210‭  ·  last activity 4y ago by msh210‭

high-school-mathematics coordinate-geometry
71%
+3 −0
Method to calculate the area of a cyclic n-gon

0 answers  ·  posted 4y ago by Razetime‭  ·  edited 4y ago by Razetime‭

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

1 answer  ·  posted 4y ago by Guilherme Costa‭  ·  last activity 4y ago by Stephan Kolassa‭

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

0 answers  ·  posted 4y ago by Mithrandir24601‭  ·  last activity 4y ago by r~~‭

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

2 answers  ·  posted 4y ago by Nezar ‭  ·  last activity 4y ago by 1muflon1‭

skewness statistics discrete-data
40%
+0 −1
Existence of a set of all sets

2 answers  ·  posted 4y ago by MathPhysics‭  ·  last activity 4y ago by Derek Elkins‭

set-theory
77%
+5 −0
Can we adapt Furstenberg's proof of the infinitude of primes to other interesting subsets of the integers?

0 answers  ·  posted 4y ago by HDE 226868‭  ·  edited 4y ago by msh210‭

number-theory topology
77%
+5 −0
Similar triangles with the same area

2 answers  ·  posted 4y ago by msh210‭  ·  last activity 4y ago by DonielF‭

euclidean-geometry high-school-mathematics
71%
+3 −0
Including Association Analysis results into existing Classification Model

0 answers  ·  posted 4y ago by Guilherme Costa‭

classification association-rules
71%
+3 −0
Asymptotics of counting integers by prime signature

1 answer  ·  posted 4y ago by Peter Taylor‭  ·  last activity 4y ago by Derek Elkins‭

number-theory
75%
+4 −0
Can we constructively find a third element of a set $X$ satisfying $X \cong X \times X$ given two distinct elements?

0 answers  ·  posted 4y ago by Derek Elkins‭

constructive-logic type-theory
80%
+6 −0
Computational hardness of the uniform halting problem

1 answer  ·  posted 4y ago by user53100‭  ·  last activity 4y ago by Derek Elkins‭

computability oracle-turing-machine arithmetical-hierarchy
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