Wikipedia:Reference desk/Archives/Mathematics/December 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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= December 1 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 1

1. Ackermann vs. tetration
2. Unbounded utility
3. Root at top of tree?
4. Wireframe cube result

= December 2 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 2

1. Integral of graph, area = infinite, volume = finite?
2. calculator for e
3. Hyperbola and its Tangent Line
4. Rearranging for x
5. Group of a given order

= December 3 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 3

1. Trapezoid
2. Ratio Proportion Problem
3. Last two digits of a given index
4. Standard Error of Products
5. Basis of K(x)
6. Is PlanetMath a valid source?
7. Mathematical symbols like < and > but with curved lines
8. a*x=b (mod N)

= December 4 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 4

1. Wikipedia:Reference_desk/Archives/Mathematics/2008 December 4#$x^4=4^x$
2. A question in trivialogy.
3. The finite fields are completely known

= December 5 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 5

1. How can you tell when you have correct digits of pi in equations with limits?
2. statistical significance and Wikipedia:Arbitration Committee Elections December 2008/Results
3. The Fabulous number i

= December 6 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 6

1. Inequality
2. simple productivity calculation
3. half functions
4. Large Counterexamples and Proof by Induction

= December 7 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 7

1. Measure Theory
2. Finding root-mean-square error for various methods
3. Topology question
4. Asking the gods of science for some help.
5. How many groups are there of a particular order?
6. Graph Sketching

= December 8 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 8

1. Infinite Box
2. Elliptic Curve Cryptography Problem...
3. Mallows' Cp
4. Tax question
5. Well-orderings of an aleph-1 set
6. Mapping circle to heart shape curve and cardioid

= December 9 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 9

1. 6th grade math
2. Proof
3. Small but not finite fields

= December 10 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 10

1. Reciprocal of a graph
2. Trigonometric identities
3. Constructing a square around a Reuleaux triangle

= December 11 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 11

1. Functions
2. Integration problem
3. Reuleaux triangle
4. Functions
5. What is a "cz" a unit of?
6. Reciprocal of a distance time graph

= December 11 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 11

1. Functions
2. Integration problem
3. Reuleaux triangle
4. Functions
5. What is a "cz" a unit of?
6. Reciprocal of a distance time graph

= December 12 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 12

1. Smallest power with a given property
2. Solution sought
3. π = –i log(–1) ?
4. Mathematics Question

= December 13 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 13

1. Is PlanetMath a valid source?
2. Continued fraction
3. Geometric shapes
4. Measure Theory questions

= December 14 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 14

1. Decidability of God
2. Partial differencial equation
3. Fixed Points
4. Closures and cluster points

= December 15 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 15

1. Integral question
2. A property of the adjugate
3. Problem
4. Function of best fit for these couples; and a general question

= December 16 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 16

1. Category Theory question from Mac Lane's book
2. How many subtractions do you need to obtain number 32, using the numbers 1, 5, 6, 7 and 9?

= December 17 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 17

1. Number of subsets of size k
2. REVISITED: How many subtractions do you need to obtain number 32, using the numbers 1, 5, 6, 7 and 9?
3. Rational inequalities

= December 18 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 18

1. Simple probability

= December 19 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 19

1. Probability regularisation
2. Boubaker polynomials

= December 20 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 20

1. Boubaker polynomials (2)
2. List of exact values of trig functions
3. On/Off Notation

= December 21 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 21

1. Feynman Restaurant Problem
2. Socks in drawer problem
3. Boubaker polynomials (3): Mr. Boubaker, please come and give your personal definition

= December 22 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 22

1. What is the factorial of a fraction and a fractionth triangular number?
2. Refs for group theory: realizability as derived or frattini subgroup
3. Probability

= December 23 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 23

1. 1 + 1 = 0?
2. Latex with WinShell, regular expressions
3. Determinants of a Non-Square Matrix!!!
4. Angles of points on surface of sphere

= December 24 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 24

1. Derivation details
2. Möbius strip
3. Annuity
4. Stirling's approximation and asymptotics

= December 26 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 26

1. inequality involving a sequence
2. Relation between trigonometric functions and exponential / multiplicative reciprocal functions
3. acromegly
4. maths quiz
5. maths quiz

= December 27 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 27

1. Square numbers

= December 28 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 28

1. math question

= December 29 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 29

1. Jet interpolation, or what?
2. MY DOUBTS
3. Summing 1's and 2's
4. acromagaly chances
5. on analytical geometry
6. inverting pixels with convolution matrix
7. Composition of polynomials is associative

= December 30 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 30

1. Factorization
2. Hypersudoku question
3. Polynomial
4. Question concerning two integrals
5. Equations for Πⁿ_i=af(x) and Σⁿ_i=af(x)
6. Extension of Σⁿ_i=af(x) and Πⁿ_i=af(x) for n≠xINT1 or n≠an integer
7. Collatz conjecture
8. Triangle wave
9. Trigonomic approximation revisited

= December 31 =

Wikipedia:Reference_desk/Archives/Mathematics/2008 December 31

1. Proof that a function from the rationals to dyadic rationals is a bijection
2. Uncountability of x S.T. f(x)=0
3. S³ vs P³