Wikipedia:Reference desk/Archives/Mathematics/October 2011

= October 1 = Reference_desk/Archives/Mathematics/2011 October 1


 * 1) Solving cos(ax) = cos(bx) generally
 * 2) moving an article from my priviate place to the public

= October 3 = Reference_desk/Archives/Mathematics/2011 October 3


 * 1) Scrabble probabilities
 * 2) Hypergeometric distribution wtf
 * 3) Why do we have odd and even numbers
 * 4) How to calculate Deming regression
 * 5) Given 2 lines that cross  in a multidimensional space, how to find the angle?
 * 6) Lebesgue integrals

= October 4 = Reference_desk/Archives/Mathematics/2011 October 4


 * 1) Sprague-Grundy theory

= October 5 = Reference_desk/Archives/Mathematics/2011 October 5


 * 1) Sine x tending towards x without L'Hôpital's rule.
 * 2) Significance testing with subgroups
 * 3) Quintic Equations Solutions

= October 6 = Reference_desk/Archives/Mathematics/2011 October 6


 * 1) Using "curve" to refer to a straight line
 * 2) .9 repeating and 1+1=3
 * 3) Number Game

= October 7 = Reference_desk/Archives/Mathematics/2011 October 7

= October 8 = Reference_desk/Archives/Mathematics/2011 October 8


 * 1) automating interpreting projections.
 * 2) Series identity

= October 10 = Reference_desk/Archives/Mathematics/2011 October 10


 * 1) Transformation of a Gamma function
 * 2) I would like to submit an article on the subject of Integer Factorization.
 * 3) Existence of near-diagonalization
 * 4) General form of a diagonalizable matrix.

= October 11 = Reference_desk/Archives/Mathematics/2011 October 11


 * 1) Jacobson density theorem: topological interpretation
 * 2) Use of Mathematical symbols for "or" in solutions to equations and inequalities, etc.
 * 3) Math refresher

= October 12 = Reference_desk/Archives/Mathematics/2011 October 12


 * 1) Incidence of light onto panel?

= October 13 = Reference_desk/Archives/Mathematics/2011 October 13


 * 1) 1959 Textbook with Chapter by Kernighan
 * 2) Teaching math: paper against computer
 * 3) Logical implications of "I propose a construction"

= October 14 = Reference_desk/Archives/Mathematics/2011 October 14


 * 1) Category theory - Ob and Mor functors
 * 2) small samples size probabilities

= October 15 = Reference_desk/Archives/Mathematics/2011 October 15


 * 1) Sum of cubes of Pythagorean triples
 * 2) Alice and Bob in the Candy Shop
 * 3) Circle probability
 * 4) error in a measurement
 * 5) 1+1=2
 * 6) Closure of C

= October 16 = Reference_desk/Archives/Mathematics/2011 October 16


 * 1) Epsilon delta
 * 2) Analyticity test
 * 3) May I use wikipedia to publish the continuum hypothesis?
 * 4) 1 2 3 4 5 6 7 8 9 0

= October 17 = Reference_desk/Archives/Mathematics/2011 October 17


 * 1) complex analysis
 * 2) Bond prices and interest rates

= October 18 = Reference_desk/Archives/Mathematics/2011 October 18


 * 1) 14th-degree polynomial functions in the real world?

= October 20 = Reference_desk/Archives/Mathematics/2011 October 20


 * 1) Associativity axiom in groups
 * 2) Multiple singular eigenvalues
 * 3) Behaviour of a function (modified)

= October 21 = Reference_desk/Archives/Mathematics/2011 October 21


 * 1) Trigonometry
 * 2) isometry T => T - T(0) linear?

= October 22 = Reference_desk/Archives/Mathematics/2011 October 22


 * 1) Interesting inner product question

= October 23 = Reference_desk/Archives/Mathematics/2011 October 23


 * 1) Zero integral theorem
 * 2) Affine transformation equivalency
 * 3) When do you raise the rate on a certificate of deposit if there are unpredictable increases in interest rates?
 * 4) Circle question
 * 5) Inflection
 * 6) p-adic integers and isomorphisms

= October 24 = Reference_desk/Archives/Mathematics/2011 October 24


 * 1) Quadratic formula
 * 2) Is the Prouhet–Thue–Morse constant all sixes and nines in hexadecimal?
 * 3) Buy expensive properties first, all else equal?
 * 4) Integration
 * 5) Determining whether 3x3 matrices are similar
 * 6) Solving polynomials in the p-adic integers

= October 25 = Reference_desk/Archives/Mathematics/2011 October 25


 * 1) Randomly ordering a set of non-duplicating integers?
 * 2) Zero times infinity = 1?  1 divided by zero = infinity?
 * 3) Idempotents in a category
 * 4) The Lorentz attractor in Lagrange notation

= October 26 = Reference_desk/Archives/Mathematics/2011 October 26


 * 1) Lotka-Volterra equations

= October 27 = Reference_desk/Archives/Mathematics/2011 October 27


 * 1) Is this an abuse of notation?
 * 2) compute incomplete beta function
 * 3) Generate values for a "logarithmic sweep"

= October 28 = Reference_desk/Archives/Mathematics/2011 October 28


 * 1) probability question
 * 2) Puzzling junior high maths question
 * 3) Difference in chances?
 * 4) General Topology

= October 29 = Reference_desk/Archives/Mathematics/2011 October 29


 * 1) Introductions to number theory, geometry
 * 2) rational and irrational numbers
 * 3) Deal or no Deal

= October 30 = Reference_desk/Archives/Mathematics/2011 October 30


 * 1) Funding students without student loans
 * 2) Trisecting an angle
 * 3) Càdlàg functions
 * 4) Trisection
 * 5) Graph of sqrt(x)=sqrt(y)
 * 6) Coloured balls in a hat probability question

= October 31 = Reference_desk/Archives/Mathematics/2011 October 31


 * 1) 1 x 10 to the power of nought
 * 2) Differentiation
 * 3) Lorenz attractor—continous or not?
 * 4) Okay, Random Weird Question