Wikipedia:Reference desk/Archives/Mathematics/February 2019

= February 1 = Reference_desk/Archives/Mathematics/2019 February 1


 * 1) Limits

= February 2 = Reference_desk/Archives/Mathematics/2019 February 2


 * 1) Iterated totients and primitive roots

= February 4 = Reference_desk/Archives/Mathematics/2019 February 4


 * 1) sum of cubes
 * 2) Are there any models of the Euclidean plane that use non-Euclidean geometry?

= February 5 = Reference_desk/Archives/Mathematics/2019 February 5


 * 1) Coloured bricks - historical

= February 11 = Reference_desk/Archives/Mathematics/2019 February 11


 * 1) Turning an iterative equation into a differential equation

= February 12 = Reference_desk/Archives/Mathematics/2019 February 12


 * 1) The Turing test
 * 2) Dedekind psi function
 * 3) Partitions of the 24-cell vertices into Hexagons?

= February 13 = Reference_desk/Archives/Mathematics/2019 February 13


 * 1) Number of dictionary-compatible phrases of length n

= February 14 = Reference_desk/Archives/Mathematics/2019 February 14


 * 1) Fantastic Beasts and Where to Find Them

= February 15 = Reference_desk/Archives/Mathematics/2019 February 15


 * 1) Solve for x

= February 16 = Reference_desk/Archives/Mathematics/2019 February 16


 * 1) Mathematical induction article, the section "Example: forming dollar amounts by coins"
 * 2) Polynomials sending primes to primes

= February 18 = Reference_desk/Archives/Mathematics/2019 February 18


 * 1) Standard deviation question
 * 2) 1 with a googolplex zeroes

= February 20 = Reference_desk/Archives/Mathematics/2019 February 20


 * 1) Inverse of function

= February 21 = Reference_desk/Archives/Mathematics/2019 February 21


 * 1) Transformation Constant

= February 22 = Reference_desk/Archives/Mathematics/2019 February 22


 * 1) Dihedral angle of antiprisms

= February 23 = Reference_desk/Archives/Mathematics/2019 February 23


 * 1) Chords instead of sines
 * 2) General formula for $int_{-infty}^{infty}frac{f(x)dx}{1+x^2}$ in terms of series expansion coefficients of $f(x)$

= February 26 = Reference_desk/Archives/Mathematics/2019 February 26


 * 1) Limit of quotient

= February 27 = Reference_desk/Archives/Mathematics/2019 February 27


 * 1) Fully faithful endofunctors of Set
 * 2) Series

= February 28 = Reference_desk/Archives/Mathematics/2019 February 28


 * 1) Rates of return