Wikipedia:Reference desk/Archives/Mathematics/April 2017

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April 1

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 2

1. Non-Hausdorff totally disconnected space
2. Intuition Behind the Riemann ζ Functional Equation

April 3

Wikipedia: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

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 8

1. Lagrange Multipliers with Inequality Constraints

April 9

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 9

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

April 10

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 11

1. Probability of having a subset

April 13

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 13

1. Euler line forms a Fixed Angle with a Given Side

April 16

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 18

1. Bayes' Theorem

April 20

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 20

1. Rubik's Revenge all checkerboard

April 21

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 21

1. Projections in Hilbert spaces

April 23

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 23

1. Coiled Phone Cord
2. Classifying n-gons

April 24

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 25

1. Cochleoid
2. Broadcasting on a dynamic grid

April 28

Wikipedia: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

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2017 April 30

1. Bivariate polynomial curves
2. Curves of constant width