Wikipedia:Reference desk/Archives/Mathematics/March 2011

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March 1

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 1

1. Value of delta
2. Self-homeomorphisms and fundamental groups

March 2

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 2

1. "Common" log?
2. Weird Latex behavior
3. Fourier Transform

March 3

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 3

1. Maths competition (again)
2. Mathematician "Sura man chi" (phonetic)
3. How can I find values that give the least bad values for these expressions?
4. Basic combinatorics problem

March 4

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 4

1. Half way between infinities
2. Conjugate Variables

March 5

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 5

1. What's the symbol that means "repeat this function"? And what's the process called?
2. Maths with Intensive and extensive properties
3. Numerical Integration problem

March 6

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 6

1. Trig identities
2. A simple-looking but not easy equation
3. Quick query - showing a simplicial complex has trivial 2nd Homology group

March 7

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 7

1. detecting clumps in weighted graph

March 8

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 8

1. Points within a fixed hyperbolic distance of a geodesic in the unit disc B^2 and unit ball B^3
2. Tensor Question

March 9

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 9

1. Identifying "off" values from how well data fit a reference
2. (x+1)^x
3. Compact surface & Gaussian curvature
4. Rounding off
5. Which number is larger?

March 11

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 11

1. Suffix notation

March 12

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 12

1. Random reverse Polish notation question
2. Flipping coins
3. Linear Algebra help

March 13

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 13

1. Matrices Question
2. Calculation of s in Lucas–Lehmer primality test
3. Multinomial terms
4. Form work of Plinth Beam or Shuttering of Plinth Beam
5. Quadratic Forms
6. recent old SAT I exams

March 14

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 14

1. complex analysis
2. Quick identification of outliers
3. Power Series
4. Problem with completing the square

March 15

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 15

1. Martingales & Optional Sampling Theorem
2. Singular value decomposition
3. Latex Pictures
4. Expression for partial sums of sequence
5. Calculator
6. powerball jackpot
7. Continuous compound interest
8. Bayesian probability

March 16

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 16

1. 2nd order difference equations vs 2nd order differential Equations
2. Probability

March 17

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 17

1. Derivatives
2. Monty Hall problem implications
3. Invariance of Differential Forms
4. Binary operation
5. Rigorous theory of "div, grad, curl, and all that"

March 18

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 18

1. Calculus theorems
2. Unrecognised mathematical notation
3. Tensors
4. Converting a Difference in GPS co-ordinates to a distance?
5. Permutation group with the greatest orbit
6. Is (3x^(1/3))(e^x-1) differentiable at zero?
7. Periods
8. Finance Question about Bond Prices and Compounded Interest Rates

March 19

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 19

1. Separating variables in a poly nomail in multivariables
2. Linear equation system with two solutions
3. homomorphism from S₄ to S₃
4. Calculating one variable from six others

March 20

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 20

1. Trigonometric distribution
2. Longest Straight Lines Across States?
3. Limits questions

March 21

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 21

1. Clopen, non-empty, proper subsets of R

March 22

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 22

1. Vectors
2. Min/max value of a vector equation

March 23

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 23

1. Injective function
2. Curve Length of Cubic Bezier Curves
3. Automorphism groups
4. M67 and years taken to find its factors by Cole

March 24

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 24

1. Large Powers
2. Latex-amsproc-paperwidth
3. Differential Equation
4. Mathematical morphology notation in research paper
5. Simultaneous equation

March 25

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 25

1. Figuring out percentages
2. Erdős–Graham problem
3. Variance of matrix-valued random variables
4. Power series
5. Monoid ring

March 27

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 27

1. 2 Questions related to 'Grids' (from a math perspective)
2. Laplace Transforms
3. Solution curves
4. Fourier Transform

March 28

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 28

1. Even and odd permutations
2. Delay Differential Equations of the Retarded Type
3. Physics of insect wings
4. confusion regarding the definition of sample space.

March 29

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 29

1. Solving a game with randomness/imperfect information
2. 56% of an area is allocated. It is increased to 78% of the original area. This is n% more than the original allocation?
3. Fundmental Theorem of Algebra
4. Broken circle

March 30

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 30

1. Wing (insect)
2. Definition of a polynomial
3. Row echelon form
4. Geometry term ?

March 31

Wikipedia:Reference_desk/Archives/Mathematics/2011 March 31

1. Jacobian matrix and determinant
2. stock growth
3. Multiplicative Maps Matrices to Reals
4. inequalities for simplices?
5. Published proof that there are only 5 regular polyhedra
6. Cycling theorem in linear programming
7. Fundamental Theorem of Algebra again