Wikipedia:Reference desk/Archives/Mathematics/February 2015

= February 1 = Reference_desk/Archives/Mathematics/2015 February 1


 * 1) "For all vertices... but at most $gamma n$ of them"
 * 2) Fitting cylinders inside a tube

= February 2 = Reference_desk/Archives/Mathematics/2015 February 2


 * 1) Quiz Question
 * 2) Probability of cashing in
 * 3) Pólya Problem to Prove (Part I Chap 19)
 * 4) percentage

= February 3 = Reference_desk/Archives/Mathematics/2015 February 3


 * 1) MATHEMATICS

= February 4 = Reference_desk/Archives/Mathematics/2015 February 4


 * 1) Cubes of the form 3 x2 ± x y + 5 y2 with x, y coprime
 * 2) Characteristic polynomial without determinant

= February 5 = Reference_desk/Archives/Mathematics/2015 February 5


 * 1) Identifying a vertex that is in every maximum matching of a bipartite graph
 * 2) Name of the shape in between three circles?

= February 6 = Reference_desk/Archives/Mathematics/2015 February 6


 * 1) Game/puzzle with smallest game-tree complexity
 * 2) Rearranging equation with integer division

= February 7 = Reference_desk/Archives/Mathematics/2015 February 7


 * 1) Animation of anchored rotating cube
 * 2) zeros of zeta function

= February 8 = Reference_desk/Archives/Mathematics/2015 February 8


 * 1) Euclidean distance
 * 2) Is there a 1:1 equivalence between algebra and geometry?

= February 9 = Reference_desk/Archives/Mathematics/2015 February 9


 * 1) Approximation of hidden markov model by probability distribution

= February 10 = Reference_desk/Archives/Mathematics/2015 February 10


 * 1) Is it an anomaly that the month of February 2015 contains four occurrences of each day of the week?
 * 2) Queuing theory: number of servers needed to meet QoS target
 * 3) Exponent of monster group F1?
 * 4) A "meta-Pólya" conjecture?
 * 5) A 'random' sequence where the previous value influences the next

= February 11 = Reference_desk/Archives/Mathematics/2015 February 11


 * 1) Name of a group
 * 2) Operators in Finite Groups

= February 12 = Reference_desk/Archives/Mathematics/2015 February 12


 * 1) Diffusion of innovations: logit or probit?
 * 2) peculiar integer factorization

= February 13 = Reference_desk/Archives/Mathematics/2015 February 13


 * 1) Massey-Omura cryptosystem

= February 14 = Reference_desk/Archives/Mathematics/2015 February 14


 * 1) Polygon with 1,000,000 sides
 * 2) zeros of zeta function

= February 16 = Reference_desk/Archives/Mathematics/2015 February 16


 * 1) zeta function

= February 17 = Reference_desk/Archives/Mathematics/2015 February 17


 * 1) Slicing a cube
 * 2) Set Theory
 * 3) Is it an anomaly that the month of February 2015 contains four occurrences of each day of the week?   (February 10)

= February 19 = Reference_desk/Archives/Mathematics/2015 February 19


 * 1) Logarithms

= February 20 = Reference_desk/Archives/Mathematics/2015 February 20


 * 1) Topic on consecutiveness

= February 21 = Reference_desk/Archives/Mathematics/2015 February 21


 * 1) Does quantum mechanics influence the model of ZFC we must use?
 * 2) arithametic sequence
 * 3) Bailey–Borwein–Plouffe formula not working for me

= February 23 = Reference_desk/Archives/Mathematics/2015 February 23


 * 1) Liquid flow
 * 2) Random walk

= February 24 = Reference_desk/Archives/Mathematics/2015 February 24


 * 1) Reference Formula Policy for Exoplanets
 * 2) Moving sofa problem
 * 3) Statistics percentile question
 * 4) Rubik's Cube Cycle for FRT?

= February 25 = Reference_desk/Archives/Mathematics/2015 February 25


 * 1) Help me to understand some mathematical picture?

= February 26 = Reference_desk/Archives/Mathematics/2015 February 26


 * 1) Sample size and confidence levels
 * 2) Calculation method help

= February 27 = Reference_desk/Archives/Mathematics/2015 February 27


 * 1) Box Plot

= February 28 = Reference_desk/Archives/Mathematics/2015 February 28


 * 1) Median
 * 2) Identify partial differential equation
 * 3) Regression with a graph (machine learning)
 * 4) Statistical tests for normality