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Wikipedia:Reference_desk/Archives/Mathematics/2009 August 1

1. computing modulo
2. Working together word problem
3. Two cubes that share three corners

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 2

1. Image of a set of measure 0
2. Normal distribution and chi-square test project - Please help
3. 0 expected value of a bet = impossible to make money (guaranteed)? why?

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 3

1. how many ways are there of arranging 8 pairs of socks on a clothesline so that no two socks from a pair are next to each other?
2. what is a quarternion?
3. Another lovely complex integral

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 4

1. Pseudoscalar
2. Showing a function is right continuous
3. Solving a system of matrix equations
4. What angle do you need to get a certain length of an arc?
5. 4D analog of a 3D cross-product.

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 5

1. A question about geographical coordinates and significant digits
2. Mandelbrot set
3. twice as wide
4. Gravity and Mass

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 6

1. Rational function?
2. Matrix function
3. Easy contour integral
4. Another integral
5. The math behind general relativity

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 7

1. Inferior goods and recessions
2. Line -> Triangle -> Pyramid -> ?

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 8

1. Alternative proof that a square matrix is similar to its transpose
2. Absolute Values with Factorials
3. Set of points with density 1

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 9

1. Constructing Triangles
2. the 24 cells of the 24-cell and their intersections
3. Functional square root
4. Finding a Permutation Matrix

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 10

1. TeX help
2. Time Simulation in Matlab
3. Complex integration

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 11

1. Integral
2. Lottery odds
3. Parametrisation

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 12

1. Using the δ/ε method to show that lim(x→0) of 1/x does not exist
2. Random Walk
3. Using the identity theorem

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 13

1. Absolute continuity
2. Radius and Volume
3. ordered sets and order types
4. Vogel's approximate method
5. Sudoku Puzzles

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 14

1. Infinity--Question/comment/request for comments
2. Regifting Robin
3. Showcase Showdown strategy
4. What's the difference?
5. Lipschitz, absolute continuity
6. Measurable functions/Derivatives

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 15

1. L^p(R^n) limit
2. N disjoint solutions to N-queens puzzle
3. What is summation of r! from r=1 to r=n?
4. Differential definition
5. Ricci Tensor
6. P(n+1) more likely to be prime if P(n) is?

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 16

1. Bounded linear operator on sigma-finite measure space
2. Entropy
3. Please fill the gaps in a table
4. Learning about multiple regression online
5. Uniformly convergent sequence of polynomials

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 17

1. Tuk-tuks
2. QQ vs. YoY
3. quick maths question
4. How many eighth degree monic polynomials are such that...
5. question about probability
6. round robin tournament

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 18

1. Combinatorics question
2. Limit of integral

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 19

1. Is this polynomial most extreme?
2. Vector perpendicular to plane

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 21

1. Quadratic turd
2. Significant digits

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 23

1. Pi
2. Lagrangian is invariant
3. Proof?
4. Average
5. A game with positions expressable as vectors
6. BN-pairs: conjugate generators weyl group give double cosets of same size

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 24

1. Probability
2. General formula for power sum
3. Greater, lesser or non-comparable

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 25

1. Topology
2. The real numbers and subsets of the natural numbers
3. Is this correct?
4. fibonacci spiral

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 26

1. Computer-aided proofs since Appel-Haken
2. Definition of Kähler manifolds
3. can u solve this
4. Commutivity of addition
5. Associativity of composition

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 27

1. A weird thing
2. Uncountability of R
3. Is .99999999999 repeating=1?
4. Line bundles and cohomology
5. What is an axiom?
6. Diophantine variances

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 28

1. Automorphisms
2. Nonconvex polyhedra
3. nested gaussian integrals.

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 29

1. Why use Poisson distribution as an approximation to binomial?
2. The Tychonoff theorem
3. Question about sets
4. Average Value of a Function
5. Fun little problem
6. Fun little macro with a (math) issue...

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 30

1. Principle of mathematical induction
2. Big O of sin x
3. What mathematics things are vs. what mathematical things do
4. PUZZLING PUZZLE
5. Sudoku boards and groups with 9 elements
6. Random trig question

Wikipedia:Reference_desk/Archives/Mathematics/2009 August 31

1. Empty set and phi
2. Method of Characteristics to solve PDEs
3. Sequence limit
4. Millimeters
5. Octahemioctahedron
6. Thank you, math reference desk
7. Weighted sum of distance from a curvy line