Wikipedia:Reference desk/Archives/Mathematics/February 2008

= February 1 = Reference_desk/Archives/Mathematics/2008 February 1


 * 1) The units of an interest rate
 * 2) Quadratic inequalities
 * 3) sin^2 x
 * 4) e to the power of

= February 3 = Reference_desk/Archives/Mathematics/2008 February 3


 * 1) Isn't there an interesting question out there about February 2?
 * 2) Distance

= February 4 = Reference_desk/Archives/Mathematics/2008 February 4


 * 1) HEY IT`S ME THE PHYSICS MAGAZINE GUY THIS TIME WITH AN ALGEBRA QUESTION
 * 2) Complex Base
 * 3) solution of Euclide
 * 4) how to pose and solve problems involvo=ing squares and square roots
 * 5) How to find generator of a group
 * 6) Top Ten List

= February 5 = Reference_desk/Archives/Mathematics/2008 February 5


 * 1) Top x% contribute y%
 * 2) Σ notation
 * 3) HELP!!! I dont understand prime numbers.
 * 4) Predicate logic, bis

= February 6 = Reference_desk/Archives/Mathematics/2008 February 6


 * 1) Trig Proof
 * 2) Two unrelated calculus questions

= February 7 = Reference_desk/Archives/Mathematics/2008 February 7


 * 1) Singular Value Decomposition
 * 2) Real Analysis
 * 3) Points on a plane
 * 4) Fitting regular polygons inside each other

= February 8 = Reference_desk/Archives/Mathematics/2008 February 8


 * 1) Ever any lotteries with an expected value greater than the ticket price?
 * 2) $lambda$ calculus
 * 3) Why does mathematics use the idea of 'truth'?
 * 4) Power reduction writ large

= February 9 = Reference_desk/Archives/Mathematics/2008 February 9


 * 1) Centre of gravity of a country and capital cities
 * 2) Algebra
 * 3) Do some countries have different order of operations
 * 4) My pocket is a set.

= February 10 = Reference_desk/Archives/Mathematics/2008 February 10


 * 1) LOGICAL SYSTEMS+NEW PRINCIPLES+ATTEMPT TO SOLVE COLLATZ CONJECTURE.
 * 2) multiplicative inverse
 * 3) Parallelogram
 * 4) Why does logic work?
 * 5) Evaluating a definite integral
 * 6) Are mathematicians racist against non-Jews?
 * 7) Inverse of sum of two matrices
 * 8) is {2,2} a set?

= February 11 = Reference_desk/Archives/Mathematics/2008 February 11


 * 1) Indefinite integral of erf^3
 * 2) Is this equation dimensionally balanced?
 * 3) Mandelbrot and Julia sets
 * 4) Disconnected set

= February 12 = Reference_desk/Archives/Mathematics/2008 February 12


 * 1) Is there are transition point between the spirals in the image when applying a Möbius transformation to spirals?
 * 2) Oblique Asymptote

= February 13 = Reference_desk/Archives/Mathematics/2008 February 13


 * 1) THE PHYSICS MAGAZINE GUY,WITH AN ALGEBRA QUESTION FROM AN ALGEBRA MAGAZINE
 * 2) Predicate logic

= February 14 = Reference_desk/Archives/Mathematics/2008 February 14


 * 1) Three calculus problems (studying for a test)
 * 2) Surd Troubles
 * 3) relation between arithmatic mean, median and mode
 * 4) On Average

= February 15 = Reference_desk/Archives/Mathematics/2008 February 15


 * 1) Simple question on exponents
 * 2) Proof by contradiction
 * 3) Urgent integration question!
 * 4) Number of solutions for a system of linear equations over finite fields.
 * 5) Sobolev Spaces
 * 6) relation between A.M, Median and Mode
 * 7) Percentage Calculator
 * 8) which number is higher?
 * 9) which number is higher? 2

= February 16 = Reference_desk/Archives/Mathematics/2008 February 16


 * 1) Coordinate system

= February 17 = Reference_desk/Archives/Mathematics/2008 February 17


 * 1) Functions with different arguments
 * 2) Empty set
 * 3) $pm$ and $mp$
 * 4) Indefinite integral of the Gamma function
 * 5) Factorials

= February 18 = Reference_desk/Archives/Mathematics/2008 February 18


 * 1) Cubic function
 * 2) Logic
 * 3) help with aproof
 * 4) Collecting Terms
 * 5) geometry - spheres and unit cubes
 * 6) Math Riddle
 * 7) Set of convergence of a sequence of measurable functions
 * 8) Googol

= February 19 = Reference_desk/Archives/Mathematics/2008 February 19


 * 1) Singular Value Decomposition & Hermitian Matrices
 * 2) fitting a conic
 * 3) Rationalising Surds

= February 20 = Reference_desk/Archives/Mathematics/2008 February 20


 * 1) zeros of a periodic function
 * 2) Donald in Mathmagic Land
 * 3) Predicate logic
 * 4) There are no countably infinite σ-algebras
 * 5) Summing 1^1 + 2^2 +3^3  ..... + 1000^1000
 * 6) Resistance
 * 7) Random calculus question
 * 8) Sum
 * 9) Integral Question

= February 21 = Reference_desk/Archives/Mathematics/2008 February 21


 * 1) Quick question about log convexity
 * 2) Natural Logs
 * 3) is math the same as logic?
 * 4) Moment
 * 5) σ-algebra redux
 * 6) Differential equation gives weird result!
 * 7) Is there anything that HAS TO be true but isn't?
 * 8) Vandermonde determinant and polynomials
 * 9) Fastest algorithm to find very smooth numbers close to some number

= February 22 = Reference_desk/Archives/Mathematics/2008 February 22


 * 1) Transfinite number
 * 2) A non-diagram solution?
 * 3) Changing coins
 * 4) More ODE madness

= February 23 = Reference_desk/Archives/Mathematics/2008 February 23


 * 1) Finding basic limits
 * 2) question about functions
 * 3) alittle bit of help
 * 4) Help needed in understanding 1925 Biometrika paper
 * 5) Mathematics(Algebra)

= February 24 = Reference_desk/Archives/Mathematics/2008 February 24


 * 1) derivatives and second derivatives of rotation functions
 * 2) Integral Powers of Trinomials
 * 3) Vibrational modes of a drum

= February 25 = Reference_desk/Archives/Mathematics/2008 February 25


 * 1) 1-1
 * 2) Approximation by Smooth Functions
 * 3) GMAT data sufficiency problem
 * 4) aquestion about closed surface
 * 5) Geometry Help: Mysterious Equation

= February 26 = Reference_desk/Archives/Mathematics/2008 February 26


 * 1) Measure Theory
 * 2) Grammars
 * 3) Completing the Square
 * 4) Geometry Help
 * 5) egytian method
 * 6) maths trick i just found out
 * 7) Trig equation
 * 8) Triangle

= February 27 = Reference_desk/Archives/Mathematics/2008 February 27


 * 1) The washer method (disk integration)
 * 2) Friend challenged me
 * 3) Chain Rule and Higher Derivative
 * 4) Recursively defined sets
 * 5) modular algorithm
 * 6) shapes and projections
 * 7) Linear equations
 * 8) Sorting a list of points for "in order of closest points"
 * 9) Rounding conundrum?

= February 28 = Reference_desk/Archives/Mathematics/2008 February 28


 * 1) Lebesgue measure of a complement?
 * 2) Finding the length of a vector
 * 3) point to point reflection formula
 * 4) Linear equations Part II
 * 5) Recursively defined sets, Part II
 * 6) Second order, linear ODE with non-constant coefficients
 * 7) Sinusoidal tourism model
 * 8) Why do they teach complicated mathematics to middle and highschool students?
 * 9) Mandelbrot set of Matrices
 * 10) COMPUTE

= February 29 = Reference_desk/Archives/Mathematics/2008 February 29


 * 1) Pretty
 * 2) Learning maths from scratch
 * 3) Regression Question
 * 4) Teaching the adjoint method of calculating the gradient
 * 5) The logistic map