Wikipedia:Reference desk/Archives/Mathematics/May 2018

= May 3 = Reference_desk/Archives/Mathematics/2018 May 3


 * 1) Casino bet: how long could your chips last?

= May 4 = Reference_desk/Archives/Mathematics/2018 May 4


 * 1) Calculating the centroid
 * 2) Should this be corrected?
 * 3) Balls into bins

= May 5 = Reference_desk/Archives/Mathematics/2018 May 5


 * 1) Monty Hall and Deal/No Deal

= May 6 = Reference_desk/Archives/Mathematics/2018 May 6


 * 1) Set of trigonometric ratios for a triangle
 * 2) Points on sides of a triangle being the vertices of an equilateral triangle

= May 10 = Reference_desk/Archives/Mathematics/2018 May 10


 * 1) Radius extrema for the circumcircle of a scalene triangle

= May 12 = Reference_desk/Archives/Mathematics/2018 May 12


 * 1) Conway's Game of Life: What are the known barriers to glider synthesis?
 * 2) Idempotent in a ring becoming zero

= May 14 = Reference_desk/Archives/Mathematics/2018 May 14


 * 1) e^pi has been proven irrational, but e^e hasn't

= May 15 = Reference_desk/Archives/Mathematics/2018 May 15


 * 1) Natural examples of propositions high up in the arithmetic hierarchy
 * 2) Given that the set of all proofs is infinite, how come we can do math at all?

= May 17 = Reference_desk/Archives/Mathematics/2018 May 17


 * 1) Interpolating the roots of a polynomial from the roots of another

= May 21 = Reference_desk/Archives/Mathematics/2018 May 21


 * 1) Collatz conjecture is almost done!

= May 24 = Reference_desk/Archives/Mathematics/2018 May 24


 * 1) Looking for a statistical test

= May 26 = Reference_desk/Archives/Mathematics/2018 May 26


 * 1) e is a rational number
 * 2) Two identical jigsaws

= May 28 = Reference_desk/Archives/Mathematics/2018 May 28


 * 1) subgroup of the free group
 * 2) Mean squared prediction error

= May 29 = Reference_desk/Archives/Mathematics/2018 May 29


 * 1) Is the proposition $exists x, ((emptyset in x) and (x in x))$ decidable in ZF ?

= May 30 = Reference_desk/Archives/Mathematics/2018 May 30


 * 1) Apéry's constant
 * 2) If the top 20% of a population has an average IQ of 130, how exactly do you calculate the average IQ of the entire population?