Wikipedia:Reference desk/Archives/Mathematics/April 2017

= April 1 = Reference_desk/Archives/Mathematics/2017 April 1


 * 1) Cube - Ellipsoid Bijection
 * 2) April 1st surprise, game theory
 * 3) A surprising theorem, whose formulation - has no free variables - and begins with an existential quantifier necessary for the surprise.

= April 2 = Reference_desk/Archives/Mathematics/2017 April 2


 * 1) Non-Hausdorff totally disconnected space
 * 2) Intuition Behind the Riemann &zeta; Functional Equation

= April 3 = Reference_desk/Archives/Mathematics/2017 April 3


 * 1) How do I do this
 * 2) Evaluating an integral
 * 3) Reverse Gaussian correlation inequality
 * 4) How quickly can a computer solve quintic equations?
 * 5) Matrix Algebra for ARIMA(1,0,0)

= April 6 = Reference_desk/Archives/Mathematics/2017 April 6


 * 1) coordination of movement of agents on a grid composed of circles
 * 2) Hidden information and probability
 * 3) Convexity and Concavtiy
 * 4) Constant sum

= April 8 = Reference_desk/Archives/Mathematics/2017 April 8


 * 1) Lagrange Multipliers with Inequality Constraints

= April 9 = Reference_desk/Archives/Mathematics/2017 April 9


 * 1) "Thirty days hath February ..."
 * 2) What is a polyomino??

= April 10 = Reference_desk/Archives/Mathematics/2017 April 10


 * 1) What's the present value of a million a year (inflation adjusted) till you die?
 * 2) Good software for doing math symbolically?

= April 11 = Reference_desk/Archives/Mathematics/2017 April 11


 * 1) Probability of having a subset

= April 13 = Reference_desk/Archives/Mathematics/2017 April 13


 * 1) Euler line forms a Fixed Angle with a Given Side

= April 16 = Reference_desk/Archives/Mathematics/2017 April 16


 * 1) Poncelet's closure theorem
 * 2) Ternary and n-terms ratios equivalent representations
 * 3) Hypercube/hypersphere volume question.

= April 18 = Reference_desk/Archives/Mathematics/2017 April 18


 * 1) Bayes' Theorem

= April 20 = Reference_desk/Archives/Mathematics/2017 April 20


 * 1) Rubik's Revenge all checkerboard

= April 21 = Reference_desk/Archives/Mathematics/2017 April 21


 * 1) Projections in Hilbert spaces

= April 23 = Reference_desk/Archives/Mathematics/2017 April 23


 * 1) Coiled Phone Cord
 * 2) Classifying n-gons

= April 24 = Reference_desk/Archives/Mathematics/2017 April 24


 * 1) derivative of constrained function is sum of unconstrained partials?
 * 2) Johnson's SU-distribution
 * 3) Face value numbers

= April 25 = Reference_desk/Archives/Mathematics/2017 April 25


 * 1) Cochleoid
 * 2) Broadcasting on a dynamic grid

= April 28 = Reference_desk/Archives/Mathematics/2017 April 28


 * 1) line of sight from building height
 * 2) number of independent sets in a regular graph
 * 3) Space of connected acyclic graphs on N

= April 29 = Reference_desk/Archives/Mathematics/2017 April 29


 * 1) Trouble with Wolfram Alpha, calculating height of spherical cap
 * 2) Chain Rule for Canonical Form
 * 3) Is the following Subset Sum Problem variant NP-hard?
 * 4) Remove peaks from data/rank articles by pageviews

= April 30 = Reference_desk/Archives/Mathematics/2017 April 30


 * 1) Bivariate polynomial curves
 * 2) Curves of constant width