Wikipedia:Reference desk/Archives/Mathematics/October 2008

= October 1 = Reference_desk/Archives/Mathematics/2008 October 1


 * 1) Recurrence
 * 2) algebra

= October 2 = Reference_desk/Archives/Mathematics/2008 October 2


 * 1) Question related to .999...
 * 2) Logic problem: Working out Wendy's birthdate
 * 3) Continuity on the complex plane
 * 4) Expressions
 * 5) Find an analytic function f(z) such that f(f(z)) = exp(z)

= October 3 = Reference_desk/Archives/Mathematics/2008 October 3


 * 1) Imaginary Numbers
 * 2) Margin of error question...?
 * 3) Please help in German–English maths translation
 * 4) Grading on a Curve: Percents, Percentiles, and Z-Scores

= October 4 = Reference_desk/Archives/Mathematics/2008 October 4


 * 1) request for solution for maths question
 * 2) maths question
 * 3) The logics of significance and insignificance
 * 4) Definite matrix
 * 5) "Undiscovered integer"?

= October 5 = Reference_desk/Archives/Mathematics/2008 October 5


 * 1) Complexity of solving a sparse linear system

= October 6 = Reference_desk/Archives/Mathematics/2008 October 6


 * 1) Solution manual
 * 2) Julia set in nature

= October 7 = Reference_desk/Archives/Mathematics/2008 October 7


 * 1) Name
 * 2) Compass and Midpoint
 * 3) Infinite increase
 * 4) Correlation between shapes
 * 5) side, edge of a circle
 * 6) The 1-D Heat Equation
 * 7) Simple statistics question

= October 8 = Reference_desk/Archives/Mathematics/2008 October 8


 * 1) Minimizing first-time comparisons
 * 2) Possible to solve this calculus problem?

= October 9 = Reference_desk/Archives/Mathematics/2008 October 9


 * 1) Order of subgroups
 * 2) Polarities
 * 3) Combinations
 * 4) simultaneous equations
 * 5) Limit of an α-sequence

= October 10 = Reference_desk/Archives/Mathematics/2008 October 10


 * 1) The real deal with fitting lines to observed data points
 * 2) Use of atan2 in a maths article

= October 11 = Reference_desk/Archives/Mathematics/2008 October 11


 * 1) 4th grade physics question (fluids, force, pressure)

= October 12 = Reference_desk/Archives/Mathematics/2008 October 12


 * 1) Multiplying matrices of functions/arrays (in MATLAB)
 * 2) Proving inequality for derivates (defined in Royden's Real Analysis)
 * 3) Differentiation problem
 * 4) Linear algebra puzzler
 * 5) cost of transporting goods

= October 13 = Reference_desk/Archives/Mathematics/2008 October 13


 * 1) Volume ratio
 * 2) 1/x integral
 * 3) help in editing gelfand pairs
 * 4) Calculating a growth (or interest) rate
 * 5) Dumb question about infinity
 * 6) Solving equations
 * 7) cardinality of unions

= October 14 = Reference_desk/Archives/Mathematics/2008 October 14


 * 1) Additional question about infinites, related to the one posted above.
 * 2) Expression for IDFT
 * 3) I need help isolating a variable

= October 15 = Reference_desk/Archives/Mathematics/2008 October 15


 * 1) The "bound"/"clamp"/? function
 * 2) conjugate harmonic function
 * 3) Simple problem re Future Value

= October 16 = Reference_desk/Archives/Mathematics/2008 October 16


 * 1) 4
 * 2) Vector problem in MATLAB

= October 17 = Reference_desk/Archives/Mathematics/2008 October 17


 * 1) Logic problem
 * 2) Tangents to circles
 * 3) Complex Function
 * 4) Diophantine Equation

= October 18 = Reference_desk/Archives/Mathematics/2008 October 18


 * 1) Equations of the form $acos{theta}=bsin{theta}$
 * 2) Integration question...
 * 3) Fourier transform in f instead of w (angular frequency) in Maple

= October 19 = Reference_desk/Archives/Mathematics/2008 October 19


 * 1) The number of arithmetic progressions possible
 * 2) Reference_desk/Archives/Mathematics/2008 October 19
 * 3) Countable metacompactness of the Sorgenfrey plane.

= October 20 = Reference_desk/Archives/Mathematics/2008 October 20


 * 1) On hyperchains
 * 2) Reflection
 * 3) Help
 * 4) the mathematician's personality.

= October 21 = Reference_desk/Archives/Mathematics/2008 October 21


 * 1) dinner party problem
 * 2) Points on a plane
 * 3) Significant figures

= October 22 = Reference_desk/Archives/Mathematics/2008 October 22


 * 1) Perfect square
 * 2) Simultaneous linear equations
 * 3) Is it true...
 * 4) Parabola

= October 23 = Reference_desk/Archives/Mathematics/2008 October 23


 * 1) Question about Collocation method
 * 2) Math(s)?
 * 3) Stat(s)?
 * 4) Bounds on the Real Zeros of a Polynomial
 * 5) efficient algorithm for converting an integer to a sum of four squares

= October 24 = Reference_desk/Archives/Mathematics/2008 October 24


 * 1) Matroid morphism
 * 2) Help with problem

= October 25 = Reference_desk/Archives/Mathematics/2008 October 25


 * 1) Roulette Odds
 * 2) Solving diophantine equations
 * 3) NNOs

= October 26 = Reference_desk/Archives/Mathematics/2008 October 26


 * 1) Dual Graph Problem...

= October 27 = Reference_desk/Archives/Mathematics/2008 October 27


 * 1) Accepted convention for combining radians and degrees
 * 2) Is this even possible?

= October 28 = Reference_desk/Archives/Mathematics/2008 October 28


 * 1) Combinatorics problems
 * 2) Induction of derivative of exponential functions
 * 3) Combinatorial problem
 * 4) Quick question about solving for factors

= October 29 = Reference_desk/Archives/Mathematics/2008 October 29


 * 1) arc length
 * 2) Asympotitic number of arithmetic progressions

= October 30 = Reference_desk/Archives/Mathematics/2008 October 30


 * 1) Singularity functions in Ti-89/84+
 * 2) Complementary integer sequences
 * 3) The function of sines

= October 31 = Reference_desk/Archives/Mathematics/2008 October 31


 * 1) Mazes
 * 2) My Theory that a fraction is a sum
 * 3) group as a fundamental group
 * 4) Functions with finite number of local extrema