Wikipedia:Reference desk/Archives/Mathematics/September 2009

= September 1 = Reference_desk/Archives/Mathematics/2009 September 1


 * 1) Integration
 * 2) Hyperbolic Functions

= September 2 = Reference_desk/Archives/Mathematics/2009 September 2


 * 1) Variables confusing me
 * 2) Continuation of the Method of Characteristics to solve PDEs
 * 3) Period
 * 4) Non-Archimedean fields

= September 3 = Reference_desk/Archives/Mathematics/2009 September 3


 * 1) Econometrics
 * 2) Binomial Expansions
 * 3) Uniform convergence of exp(-x2)sin(x/n) over R

= September 4 = Reference_desk/Archives/Mathematics/2009 September 4


 * 1) 12 people in a family, all with birthdays in different months
 * 2) Canonical Forms for PDEs

= September 5 = Reference_desk/Archives/Mathematics/2009 September 5


 * 1) The Sorgenfrey plane
 * 2) Great retrosnub icosidodecahedron
 * 3) Uniform Continuity of sin(x3)/(x+1)
 * 4) Properties of an isosceles triangle
 * 5) Dense in C
 * 6) Divisor of a Riemann surface
 * 7) Function elements

= September 6 = Reference_desk/Archives/Mathematics/2009 September 6


 * 1) Evaluating a probability estimator
 * 2) Automorphisms of Z[x]

= September 7 = Reference_desk/Archives/Mathematics/2009 September 7


 * 1) Latex align* multiple points of alignment.
 * 2) Reduction to Canonical Form
 * 3) FRACTALS
 * 4) Irreducible representations of signed permutations (double young diagrams?)
 * 5) A^n*B^n ≠ (A*B)^n for matrices (get around)
 * 6) A topological counterexample
 * 7) Base Conversion
 * 8) Presentation of dihedral group

= September 8 = Reference_desk/Archives/Mathematics/2009 September 8


 * 1) set
 * 2) The sorgenfrey plane 2
 * 3) mathematics
 * 4) Piecewise functions
 * 5) Dihedral group of a polygon
 * 6) Metric completion of a field
 * 7) Poker and math
 * 8) Hermite polynomials and Hermite Interpolation
 * 9) Derivative of a function between matrices
 * 10) Is this a hyperbola or...

= September 9 = Reference_desk/Archives/Mathematics/2009 September 9


 * 1) Effect of type I vs Type II error cost difference
 * 2) Why angle side angle?

= September 10 = Reference_desk/Archives/Mathematics/2009 September 10


 * 1) Weaker variant of Schur for sum of two = irreducibles: two eigenvalues?
 * 2) maths?
 * 3) Paper towels

= September 11 = Reference_desk/Archives/Mathematics/2009 September 11


 * 1) Matrices and equations
 * 2) Irrational perfect set
 * 3) Life expectancy of the oldest
 * 4) Using discrete crime data points to estimate relative rates by geography
 * 5) Differential equation

= September 12 = Reference_desk/Archives/Mathematics/2009 September 12


 * 1) Simplify integral
 * 2) what is the value of k that must be added to 7,16,43,79 so that they are in proportion?
 * 3) Fourier Transforms

= September 13 = Reference_desk/Archives/Mathematics/2009 September 13


 * 1) Path problem
 * 2) Table puzzle
 * 3) Sample space

= September 14 = Reference_desk/Archives/Mathematics/2009 September 14


 * 1) chess variables and states
 * 2) winning games
 * 3) Why so many 20ps
 * 4) Geometry question
 * 5) integral approximation name
 * 6) Probabilities of unobserved observations
 * 7) Parabola in projective space

= September 15 = Reference_desk/Archives/Mathematics/2009 September 15


 * 1) Box and Whisker Plot
 * 2) Brain Teaser
 * 3) Zeros of Derivatives

= September 16 = Reference_desk/Archives/Mathematics/2009 September 16


 * 1) What is the correct pronunciation of George Pólya's last name?
 * 2) How many combinations are there?
 * 3) Interpretation help
 * 4) Expectation

= September 17 = Reference_desk/Archives/Mathematics/2009 September 17


 * 1) Formula for placing things equidistant along a circle circumference
 * 2) help me ...it will safe my future..??
 * 3) Writing Roman Numerals
 * 4) Equation of oscillator - flat section

= September 18 = Reference_desk/Archives/Mathematics/2009 September 18


 * 1) Substitution in the integral
 * 2) A really brainy sum !!!!!

= September 19 = Reference_desk/Archives/Mathematics/2009 September 19


 * 1) Field extensions
 * 2) calculations over three years
 * 3) Method to generate symmetries of a point lattice

= September 20 = Reference_desk/Archives/Mathematics/2009 September 20


 * 1) Collection of six related primes
 * 2) Normal approximation to the binomial with continuity correction

= September 21 = Reference_desk/Archives/Mathematics/2009 September 21


 * 1) Set-builder notation and primes

= September 22 = Reference_desk/Archives/Mathematics/2009 September 22


 * 1) Bouncing balls

= September 23 = Reference_desk/Archives/Mathematics/2009 September 23


 * 1) Advanced geometry homewrok
 * 2) Recruiting math exam questions...
 * 3) Introduction to number theory
 * 4) Calculating integrals (for use in probability theory)

= September 24 = Reference_desk/Archives/Mathematics/2009 September 24


 * 1) My mathematical ability.
 * 2) Moment Generating Function
 * 3) Easy question
 * 4) Solving systems of equations in three variables
 * 5) Complex number

= September 25 = Reference_desk/Archives/Mathematics/2009 September 25


 * 1) Number of possible permutations in the lottery
 * 2) Null hypothesis "trueness"?
 * 3) Isomorphism between the space of infinite R-valued sequences and the space of polynomials on R
 * 4) Convergence of random variables in mean

= September 26 = Reference_desk/Archives/Mathematics/2009 September 26


 * 1) Chess outcomes

= September 27 = Reference_desk/Archives/Mathematics/2009 September 27


 * 1) Fictional Solar Eclipse Calculation
 * 2) Derivative of a complex function

= September 28 = Reference_desk/Archives/Mathematics/2009 September 28


 * 1) prove ~A /\ ~B from ~(A \/ B)
 * 2) What is this "theory"/scheme called?
 * 3) Conformal mapping question

= September 29 = Reference_desk/Archives/Mathematics/2009 September 29


 * 1) Pair and more pairs
 * 2) Ellipse theorem
 * 3) Interest on Savings Account

= September 30 = Reference_desk/Archives/Mathematics/2009 September 30


 * 1) Solving a modular diophantine equation
 * 2) Teminology request
 * 3) Odds + probability