Wikipedia:Reference desk/Archives/Mathematics/July 2012

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style="background: #5D7CBA; text-align: center; font-family:Arial; color:#FFFFFF;" | Welcome to the Wikipedia Mathematics Reference Desk Archives
The page you are currently viewing is a monthly archive index. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

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= July 1 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 7

1. Air Conditioner running cost.

= July 8 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 9

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

= July 10 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 10

1. Pythagorean triples

= July 11 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 12

1. Area of part of an oval

= July 13 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 14

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

= July 16 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 18

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

= July 19 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 20

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

= July 21 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 21

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

= July 22 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 22

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

= July 23 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 24

1. Solve the problem
2. Word numerical
3. Wikigraphs

= July 25 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 27

1. Lagrangian mechanics

= July 28 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 28

1. Very important question
2. Tests

= July 29 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2012 July 31

1. Matrices are unique?
2. Quality of polling