Wikipedia:Reference desk/Archives/Mathematics/February 2011

= February 1 = Reference_desk/Archives/Mathematics/2011 February 1


 * 1) Can somone help with the following proof
 * 2) Matching Socks in the Dark
 * 3) Area of a quadrilateral

= February 2 = Reference_desk/Archives/Mathematics/2011 February 2


 * 1) Twelvefold way
 * 2) Quick request for proof
 * 3) Line segment
 * 4) Stats and probability
 * 5) Sectitive and Quantative Numbers

= February 3 = Reference_desk/Archives/Mathematics/2011 February 3


 * 1) IPv4 vs IPv6 for dumdums?
 * 2) supremum and infimum of a quotient of two series
 * 3) Affine Grassmanian
 * 4) Journal article author affiliation
 * 5) Contour integral

= February 4 = Reference_desk/Archives/Mathematics/2011 February 4


 * 1) matrix/vector algebra problem
 * 2) Love heart
 * 3) Finding range of  7+5cos5x  divided by  8-6cos6x
 * 4) Coin nominal values

= February 5 = Reference_desk/Archives/Mathematics/2011 February 5


 * 1) maximization
 * 2) gradient of scalar product
 * 3) Multiplicative inverse function?
 * 4) A calculus problem
 * 5) Primitive Roots
 * 6) proper class in ZFC
 * 7) Algorithmic complexity
 * 8) Seemingly simple problem

= February 6 = Reference_desk/Archives/Mathematics/2011 February 6


 * 1) Un-deducting percentages
 * 2) Integers
 * 3) mathematics
 * 4) Calculus
 * 5) Input-to-state stability
 * 6) Compact manifold without boundary not contractible

= February 7 = Reference_desk/Archives/Mathematics/2011 February 7


 * 1) Human Population - Two Questions

= February 8 = Reference_desk/Archives/Mathematics/2011 February 8


 * 1) Difficulty in finding Indefinite integral
 * 2) Can game theory help with reverse auctions?

= February 9 = Reference_desk/Archives/Mathematics/2011 February 9


 * 1) how long to cross the 0 on a random walk
 * 2) mathematicians: useful or useless?
 * 3) 3,5,7 = triple adjacent primes, are there any others?
 * 4) Percent of negligible error
 * 5) Fisher's Least Significant Difference test vs. Tukey's Least Significant Difference test (statistics)
 * 6) Does such a value exist?
 * 7) Good ol algebra word problems
 * 8) discrete fourier transform in mathematica

= February 10 = Reference_desk/Archives/Mathematics/2011 February 10


 * 1) Need help with puzzle. No solution please
 * 2) Please calculate the total taxi fare and other fees from Itoman, Okinawa all the way to Cape Soya, Hokkaido.
 * 3) H2: equidistant curve tangent to a given line
 * 4) differentiation by first principles
 * 5) Basic Probability
 * 6) Compactly generated space
 * 7) Probability question
 * 8) Arc length integral

= February 11 = Reference_desk/Archives/Mathematics/2011 February 11


 * 1) "One to one" and "onto"
 * 2) Solving limits
 * 3) Ballistics
 * 4) Algorithm for Time Complexity?

= February 12 = Reference_desk/Archives/Mathematics/2011 February 12


 * 1) Every possible combination of the numbers 1-8 assuming. ..

= February 13 = Reference_desk/Archives/Mathematics/2011 February 13


 * 1) First d Decimal Places
 * 2) Efficient linear algebra in a world of partial knowledge
 * 3) Finitely presented groups isomorphic
 * 4) Great circle direction

= February 14 = Reference_desk/Archives/Mathematics/2011 February 14


 * 1) Heuristic justification for Goldbach's conjecture
 * 2) Separation of variables problem

= February 15 = Reference_desk/Archives/Mathematics/2011 February 15


 * 1) Unusual description of the Klein bottle
 * 2) A derivatives question

= February 16 = Reference_desk/Archives/Mathematics/2011 February 16


 * 1) Modeling High Dimensional Dynamical System
 * 2) Generalisations of the Monty Hall problem
 * 3) Non linear second order ODEs
 * 4) Simultaneous functions
 * 5) Dividing a Fraction by a whole number
 * 6) Infinite groups

= February 17 = Reference_desk/Archives/Mathematics/2011 February 17


 * 1) Need info on Octagonal Pyramid

= February 18 = Reference_desk/Archives/Mathematics/2011 February 18


 * 1) arithmetic vs higher cardinality
 * 2) Calculation of Pi
 * 3) FDR and q-value

= February 19 = Reference_desk/Archives/Mathematics/2011 February 19


 * 1) is the BFGS formula right?
 * 2) Weierstrass substitution

= February 20 = Reference_desk/Archives/Mathematics/2011 February 20


 * 1) "Reducible" differential equation
 * 2) Geometric representation of square numbers
 * 3) complex vs chaotic
 * 4) Is it optimal for the evaluation method used to change with frequency?
 * 5) Loxodromic transformation: product of 4 inversions

= February 21 = Reference_desk/Archives/Mathematics/2011 February 21


 * 1) Adjusting for leap years

= February 22 = Reference_desk/Archives/Mathematics/2011 February 22


 * 1) integrating
 * 2) Functional square roots
 * 3) Generators of functions

= February 23 = Reference_desk/Archives/Mathematics/2011 February 23


 * 1) Math puzzle

= February 24 = Reference_desk/Archives/Mathematics/2011 February 24


 * 1) Partial differentiation quiz

= February 25 = Reference_desk/Archives/Mathematics/2011 February 25


 * 1) Limit monstrosity
 * 2) Vertices of a hyperbolic tiling
 * 3) Pumpkin weight problem
 * 4) Asymptotes
 * 5) problem with the algorithm for programing b-spline
 * 6) Spiral staircase

= February 26 = Reference_desk/Archives/Mathematics/2011 February 26


 * 1) Lagrangian Multipliers

= February 27 = Reference_desk/Archives/Mathematics/2011 February 27


 * 1) Combinatorics/probability question
 * 2) Bridge card hand: binary encoding problem
 * 3) Interesting Integrals

= February 28 = Reference_desk/Archives/Mathematics/2011 February 28


 * 1) Formal proof of equivalences
 * 2) Integration by Parts
 * 3) Series question
 * 4) Number of solutions in a system of linear equations
 * 5) Taylor series question