Wikipedia:Reference desk/Archives/Mathematics/June 2009

}} {{#ifeq:{{NAMESPACE}}|Wikipedia|{{#switch:{{NAMESPACE}}|= |}}

width = "100%"

! width="25%" align="center"|<< May | Mathematics desk | Jul >>

align=center width=95% style="background: #FFFFFF; border: 1px solid #003EBA;" cellpadding="8" cellspacing="0"
style="background: #5D7CBA; text-align: center; font-family:Arial; color:#FFFFFF;" | Welcome to the Wikipedia Mathematics Reference Desk Archives
The page you are currently viewing is a monthly archive index. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

__TOC__

= June 1 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 1

1. Could set theory (ZFC) be wrong?
2. Euler's identity

= June 2 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 2

1. Integration
2. babyloian quadratic equations
3. Conic section ellipse
4. Looking for a textbook on solid geometry
5. Functional Analysis
6. What inequality should I use here

= June 3 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 3

1. How Many Triangles?
2. Modelling "value" for used cars
3. u dv

= June 4 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 4

1. Cirumference of a circle

= June 5 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 5

1. Topology: Density of rational functions and Euclidean Balls
2. volume of torus

= June 6 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 6

1. Separated/connected equivalence
2. Spherical wedge

= June 7 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 7

1. Hypothesis testing, backwards?
2. Connected sets
3. A particular quotient space.
4. Could it turn out that no axiomatic system is consistent?
5. Pairwise intersecting sets of bounded size

= June 8 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 8

1. statistics
2. Why doesn't 10 divided by zero equal infinity?
3. Plotting contour lines from discrete points

= June 9 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 9

1. Can a limit be infinite?
2. Wedge again
3. Look-and-say sequence
4. Harmonic function
5. Set of coordinates in R^2 with exactly 1 rational point - connected?

= June 10 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 10

1. Solution to a nonlinear ODE
2. Topology question

= June 11 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 11

1. Pooling related binomial statistics
2. Graphing complex functions online
3. Proof that the axiom of choice implies the well-ordering principle?

= June 12 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 12

1. A question of sociopathic probability...
2. crazy hard math question
3. Differentiating the Jacobian determinant, need some help!

= June 13 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 13

1. Paradox of the twots
2. Twin prime version of Copeland-Erdos constant
3. Need help with radical equation questions.

= June 14 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 14

1. alzebra quary of 9 standard

= June 15 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 15

1. Predicting Score in a T20 match
2. Olympiad question
3. Conic section-Simultaneity in relativity
4. I divide every value in a table with the smallest value in the same table. What have I done.
5. Differential equation
6. Formula for Sine based on just angle
7. Growth rate of functions

= June 16 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 16

1. rule finding
2. Area of a circle
3. How many baseball games total in a season?
4. Voting algorithm
5. Is one number a power of the other? Time efficiency
6. Is this construction possible?
7. Complex integration blues
8. Area of a sector
9. Product of contiguous sets
10. Summation

= June 17 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 17

1. A simple riddle.
2. name of math concept
3. volume of a sack
4. Enigma puzzle from New Scientist magazine

= June 18 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 18

1. Converting a floating point number to an integer using basic arithmetic
2. Interior
3. Continuous functions without known primitive ?
4. The torus double-covers the sphere

= June 19 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 19

1. Riemann Zeta Function
2. Integral and series
3. Bernoulli numbers
4. friction
5. Statisics (PCA): Can we have a PCA-based reconstruction that includes negative weighting of some sensors that express only a postive physical quantity?
6. A trig equation

= June 20 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 20

1. Approximation
2. Car dynamics
3. Necessary and sufficient conditions
4. Maximizing the volume in a certain class of sets

= June 21 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 21

1. Finding the median of a continuous random variable
2. Induction
3. N-deck hearts

= June 22 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 22

1. Linear topological space
2. The gambler's fallacy
3. question on stats
4. Door codes

= June 23 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 23

1. Limits
2. Enumerating Rationals
3. Inequality
4. Empty mean

= June 24 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 24

1. Normal distribution curves from two values.
2. Bezier curve with width
3. Find an array of numbers, max_i and max_j being given
4. poker odds

= June 25 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 25

1. two questions
2. Chain Rule for Matrices
3. Integral is 0 on any interval
4. 36 standard deviations away from the mean on a normal distribution

= June 26 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 26

1. Small World Experiment

= June 27 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 27

1. sample path
2. Algebraic equation
3. Resolving ties in Ranked Pairs
4. Measurable functions on [0,1]

= June 28 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 28

1. Divisible by 126
2. calculate pi with hot dogs

= June 29 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 29

1. dependency with a fractional exponent

= June 30 =

Wikipedia:Reference_desk/Archives/Mathematics/2009 June 30

1. Linear functionals
2. Unemployment vs. application rate
3. "Scoring" a product, correcting for incomplete scores.
4. Expected value of the reciprocal of the gcd
5. Calculating residues
6. Double integral = 0 over all rectangles