Wikipedia:Reference desk/Archives/Mathematics/April 2011

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April 1

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 1

1. Difficult integration question
2. How to choose substitution function while finding antiderivative by method of substitution
3. Solving by detour
4. Still more Fundamental Theorem of Algebra
5. Math for Social Science

April 2

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 2

1. Lagrangian problem
2. Isomorphic graphs
3. Rotation of a plane

April 3

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 3

1. Probability model for rain
2. Hessian determinant for 3 or higher-variate functions

April 4

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 4

1. Notation
2. Trivial question has me defeated
3. sets of numbers with bounded subsets
4. Stalk
5. Latex resize align*

April 5

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 5

1. A^⊕n
2. BibTex Style File
3. Well-behaved functions with respect to measure
4. Modifying encrypted data without decrypting it
5. Recursive formula
6. Polyhedron whose vertices correspond to unordered pairs

April 6

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 6

1. Laplace
2. Continuity

April 7

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 7

1. Pairwise distinct
2. Convergence to zero
3. Graph Ramsey number
4. Curvature
5. More on "triangular graphs"
6. "Straight" line on a curved surface

April 8

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 8

1. Hysterisis
2. Prime number

April 9

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 9

1. Limit

April 10

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 10

1. Differentiation problem
2. Set Theory
3. Very easy maths question
4. Map from z-plane to w-plane
5. integral

April 11

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 11

1. Why are the imaginary parts of some nontrivial Riemann zeta zeroes so close to integers?
2. Number sequence
3. Game theory

April 12

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 12

1. Integral formulas
2. Graph factorization
3. Latex problem
4. Ambigious or not?
5. Question about Peano arithmetic

April 13

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 13

1. Constant (mathematics) vs Mathematical constant
2. Yupana
3. Representation theory - problem understanding lecture notes, request for clarification!
4. Even graph with even edges
5. Parameterisation
6. Self complementary graphs

April 15

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 15

1. Hawaiian earring
2. lim
3. prime number
4. Exam Question - graph theory
5. mathmatics/trigonomatry
6. Topology Question
7. Polyhedra and topology

April 16

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 16

1. Reason behind definitions of cross product and dot product
2. Maximal Ideals

April 17

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 17

1. Sum of powers
2. Lyapunov exponent of a Rossler oscillator
3. (Another!) graph theory question
4. "transverse to a manifold"

April 18

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 18

1. Constructing an uncountable ordinal using neither axiom of choice NOR replacement
2. Generating values from a multivariate normal distribution
3. Parameterization
4. Counting

April 19

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 19

1. N(a) prime, then a is irreducible
2. 'Complete' convergence of random variables
3. The significance of the point (0, 1)
4. Yet another form of the tangent half-angle formula

April 20

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 20

1. Light Years
2. Solving f(t) and g(t) so that application of either always generates a new value

April 21

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 21

1. about isomorphism between chain groups
2. Contour Integral
3. Number of involutions in groups
4. Integrals and limits
5. Derivatives
6. King's tour

April 22

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 22

1. Integration by parts for improper integrals
2. Differentiating under the integral sign
3. Weak Nulstellensatz
4. Fourier transform of Schwartz functions
5. Algebraic Topology

April 23

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 23

1. Log help
2. 0 vector and orthogonality
3. simplicial mapping
4. Minimum Value
5. Smooth functions

April 24

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 24

1. Group Cohomology
2. Clarification: homework question
3. Homeomorphism
4. Working out loan APR from monthly cost

April 25

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 25

1. Directed-complete posets
2. Graph Theory doubt
3. Lie algebra
4. The Reality of negative numbers.
5. Hausdorff dimension under the map x -> x^2

April 26

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 26

1. Integration
2. Showing $ell_{p}$ is of first category in $ell_{r}$ for r > p (and a second query on weak convergence)

April 27

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 27

1. Multiplication problem

April 28

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 28

1. Help with a question of Limit
2. Arzelà-Ascoli theorem and second order differential equations
3. Maths of the PID Controller algorithm
4. Fibre Bundle Question

April 29

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 29

1. Calculating presence of root.
2. Dimensions and existence of an inverse
3. Showing 2 shapes are or are not homeomorphic
4. Combinatorial problem
5. Policy Proposition

April 30

Wikipedia:Reference_desk/Archives/Mathematics/2011 April 30

1. Logistic regression
2. Question on algebraic topology, absolutely no clue where to get started, please help!
3. How do finitists define real numbers?