Wikipedia:Reference desk/Archives/Mathematics/October 2008

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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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= October 1 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 1

1. Recurrence
2. algebra

= October 2 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 5

1. Complexity of solving a sparse linear system

= October 6 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 6

1. Solution manual
2. Julia set in nature

= October 7 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 8

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

= October 9 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 11

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

= October 12 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 15

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

= October 16 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 16

1. 4
2. Vector problem in MATLAB

= October 17 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 17

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

= October 18 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 19

1. The number of arithmetic progressions possible
3. Countable metacompactness of the Sorgenfrey plane.

= October 20 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 20

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

= October 21 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 21

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

= October 22 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 22

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

= October 23 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 24

1. Matroid morphism
2. Help with problem

= October 25 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 25

1. Roulette Odds
2. Solving diophantine equations
3. NNOs

= October 26 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 26

1. Dual Graph Problem...

= October 27 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 27

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

= October 28 =

Wikipedia: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 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 October 29

1. arc length
2. Asympotitic number of arithmetic progressions

= October 30 =

Wikipedia: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 =

Wikipedia: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