Wikipedia:Reference desk/Archives/Mathematics/July 2012

= July 1 = Reference_desk/Archives/Mathematics/2012 July 1


 * 1) Which font is used in equations
 * 2) Probability question
 * 3) "Best" twice differentiable upper bound approximations of functions for optimization?

= July 2 = Reference_desk/Archives/Mathematics/2012 July 2


 * 1) Bases of Fermat quotients
 * 2) Material conditional and functional completeness
 * 3) Name for set including Moebius strip and Klein Bottle?

= July 5 = Reference_desk/Archives/Mathematics/2012 July 5


 * 1) Cartesian product of an EVEN number of nonorientable manifolds
 * 2) Solving an equation for a variable

= July 7 = Reference_desk/Archives/Mathematics/2012 July 7


 * 1) Air Conditioner running cost.

= July 8 = Reference_desk/Archives/Mathematics/2012 July 8


 * 1) math questions regarding 1 per hundred, 1 per thousand, 1 per ten and other numbers
 * 2) Rigid Body Rotation
 * 3) matrix vs. tensor

= July 9 = Reference_desk/Archives/Mathematics/2012 July 9


 * 1) Kindly Help me with datum curve equation
 * 2) Interpolating Inputs or Outputs

= July 10 = Reference_desk/Archives/Mathematics/2012 July 10


 * 1) Pythagorean triples

= July 11 = Reference_desk/Archives/Mathematics/2012 July 11


 * 1) Reducing number of input variables in data modeling
 * 2) Formula to compute Euler angles messed up

= July 12 = Reference_desk/Archives/Mathematics/2012 July 12


 * 1) Area of part of an oval

= July 13 = Reference_desk/Archives/Mathematics/2012 July 13


 * 1) Confusion about orbit of PSL(2,5)/A_5 on unordered triples (10/20?)
 * 2) What's the correct word for "periodizing" the input to a periodic function?
 * 3) Fourier Analysis

= July 14 = Reference_desk/Archives/Mathematics/2012 July 14


 * 1) pessimistic tit-for-two-tats
 * 2) Concerning Ramsey Numbers
 * 3) Are circles fractals?

= July 16 = Reference_desk/Archives/Mathematics/2012 July 16


 * 1) How do you call in statistics when you correct the data?
 * 2) "n-body problem" singularities
 * 3) (simple) Example of design with non-fixed intersection numbers?

= July 17 = Reference_desk/Archives/Mathematics/2012 July 17


 * 1) Power in the Zero Channel
 * 2) two problems with tangent circles
 * 3) A weird kind of 20 sided dice...

= July 18 = Reference_desk/Archives/Mathematics/2012 July 18


 * 1) Polygon triangulation
 * 2) Collective term for interpolation and extrapolation
 * 3) Alternate definition?

= July 19 = Reference_desk/Archives/Mathematics/2012 July 19


 * 1) Number that isn't a scalar
 * 2) Extendible cardinals vs Reinhardt cardinals
 * 3) rotating a sphere in higher dimensions

= July 20 = Reference_desk/Archives/Mathematics/2012 July 20


 * 1) If you know the average of a group bigger or equalt to 2 ...

= July 21 = Reference_desk/Archives/Mathematics/2012 July 21


 * 1) System of bilinear equations
 * 2) (2x)^y=x
 * 3) Function inversion via control theory

= July 22 = Reference_desk/Archives/Mathematics/2012 July 22


 * 1) Texniccenter
 * 2) Commission
 * 3) Show that the hemisphere is connected.

= July 23 = Reference_desk/Archives/Mathematics/2012 July 23


 * 1) Prime Pascal
 * 2) Different non-touching edge choices on Regular polyhedra question...
 * 3) Error in article but cannot edit it
 * 4) Primorials

= July 24 = Reference_desk/Archives/Mathematics/2012 July 24


 * 1) Solve the problem
 * 2) Word numerical
 * 3) Wikigraphs

= July 25 = Reference_desk/Archives/Mathematics/2012 July 25


 * 1) in MATLAB, the absolute value of the Pearson correlation coefficient is much higher than sqrt(R^2) of least squares fit
 * 2) Term for visual appearance of slope
 * 3) How does curvature correlate to velocity in a random walk with randomly-distributed speeds (i.e. Brownian motion)?

= July 27 = Reference_desk/Archives/Mathematics/2012 July 27


 * 1) Lagrangian mechanics

= July 28 = Reference_desk/Archives/Mathematics/2012 July 28


 * 1) Very important question
 * 2) Tests

= July 29 = Reference_desk/Archives/Mathematics/2012 July 29


 * 1) under a coordinate transformation
 * 2) I don't think you should be able to prove it.
 * 3) is "can't be proof" synonymous with independent?

= July 30 = Reference_desk/Archives/Mathematics/2012 July 30


 * 1) suppose a man produces a proof P that statement Q cannot be proven under Some Axioms but definitely has a certain Truth Value (unknown) under those axioms.
 * 2) Standard proof for identity:
 * 3) we just proved we can't prove it one way or another or know which one it is, but this statement is definitely false or true - not independent.
 * 4) example of an axiom that is statistically probably false
 * 5) popular description of result of independence
 * 6) Integral proof

= July 31 = Reference_desk/Archives/Mathematics/2012 July 31


 * 1) Matrices are unique?
 * 2) Quality of polling