Wikipedia:Reference desk/Archives/Mathematics/February 2008

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February 1

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 3

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

February 4

Wikipedia: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

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 6

1. Trig Proof
2. Two unrelated calculus questions

February 7

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 8

1. Ever any lotteries with an expected value greater than the ticket price?
2. [[Wikipedia:Reference_desk/Archives/Mathematics/2008 February 8#$lambda<.2Fmath>calculus|<math>lambda$ calculus]]
3. Why does mathematics use the idea of 'truth'?
4. Power reduction writ large

February 9

Wikipedia: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

Wikipedia: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. [[Wikipedia:Reference_desk/Archives/Mathematics/2008 February 10#is {2,2} a set?|is {2,2} a set?]]

February 11

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 16

1. Coordinate system

February 17

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 17

1. Functions with different arguments
2. Empty set
3. [[Wikipedia:Reference_desk/Archives/Mathematics/2008 February 17#$pm<.2Fmath>and<math>mp<.2Fmath>|<math>pm$ and $mp$]]
4. Indefinite integral of the Gamma function
5. Factorials

February 18

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 19

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

February 20

Wikipedia: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

Wikipedia: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

Wikipedia:Reference_desk/Archives/Mathematics/2008 February 22

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

February 23

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia: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

Wikipedia: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