Wikipedia:Reference desk/Archives/Mathematics/September 2019

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September 1

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 1

1. Central binomial coefficient difficult proof

September 3

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 3

1. Kummer transformation

September 9

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 9

1. identify mathematicians

September 12

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 12

1. Problem from splitting pills
2. Continuous function sending every real number to itself or its opposite but neither even nor odd

September 13

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 13

1. Symmetrical set Venn diagram
2. Sphericity

September 14

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 14

1. Fibonacci numbers and Friday the 13th

September 15

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 15

1. Continuous function that is "even" at some points but "odd" at others

September 19

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 19

1. Subtended angle
2. Fundamental Theorem of Line Integrals
3. Composite numbers whose divisors are all perfect squares plus one

September 22

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 22

1. percentage

September 24

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 24

1. significant figures

September 25

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 25

1. Fast verification that elliptic-curve point multiplication gives (0,0)
2. Smallest grid with four orientation and every possible 2x2 combination in it.

September 26

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 26

1. Is there a standard textual method of describing a planar graph?

September 28

Wikipedia:Reference_desk/Archives/Mathematics/2019 September 28

1. Can formula such as this be represented mathematically by geometric shapes?
2. random partitions of an interval