Wikipedia:Reference desk/Archives/Mathematics/January 2013

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January 1

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 1

1. Archimedes uses time machine to beat Lambert
2. SOLVING ALL POLYNOMIALS BY RADICALS
3. matrix

January 2

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 2

1. Srinivasa Ramanujan's deathbed theory solved after 100 years
2. Concave quadrilateral requirement?
3. my hat, your hat, quantum entanglement, and OTP

January 3

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 3

1. Low-probability high-payoff events
2. optimization and regularization!
3. Decomposing hermitian matrix into rank-one matrices
4. Cell phone pre-paid card optimization

January 4

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 4

1. Starting hand matchups in Texas holdem

January 5

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 5

1. Finite generation of ideal
2. Identities true for only small (square) matrices

January 6

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 6

1. abelian groups: dual group induces dual group of subgroup by restricting
2. Problem with editting an article based on one's own published paper?

January 9

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 9

1. How to prove the commutative property?
2. modulus/cardanality
3. Matrix inversions

January 10

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 10

1. How low can you go?
2. Trying to Calculate my Class Rank
3. Topics more tougher than calculus
4. Dirichlet distribution
5. Base 10, 11 and fingers question.
6. Rotation of arbitrary coordinate systems
7. regression for data that is a power function: copied from Miscellaneous desk

January 11

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 11

1. Converting this to an integrable form
2. Heuristic argument for expected number of solutions to specific congruence
3. Chances of counter-intuitive results from a betting system
4. Base pi

January 12

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 12

1. Computing the CDF of the Student's T-distribution
2. π = √10?
3. Sum of products
4. would it be a proof by construction of the possible existence of God?

January 15

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 15

1. Empty Sets and Neighbourhoods definition of a Topological Space
2. Hypergeometric function
3. Calculating the multiplicative order
4. Trouble Reading an Article

January 16

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 16

1. How many "non-trivially distinct" Gray codes of a given alphabet size and codeword length exist?

January 17

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 17

1. Riemann hypothesis for curves over finite fields
2. algebra word problems
3. Undecidability of the Collatz conjecture
4. What is radius of equilateral polygon?

January 18

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 18

1. Blackjack
2. number of subgroups
3. Visual Multiplication with Lines
4. Amount of starter positions possible in those random chess variants.

January 19

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 19

1. Riemann hypothesis for curves over finite fields
2. prime ideal extension and contraction
3. Running time of APR-CL
4. Estimating a categorical distribution
5. Geometric figure Extension.
6. Independence number of graph: bound similar to Lovasz number?

January 20

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 20

1. Integral

January 21

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 21

1. Lanchester Square Law
2. 3 3's

January 22

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 22

1. calculus
2. MDAS method
3. Examples of (1+1/n)^n in nature.
4. Why only one real cube root?

January 23

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 23

1. website regarding numbers like 13.7 billion
2. Is there a closed form expression for this quantity?

January 24

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 24

1. Chicken-and-Egg Problem
2. traditional limit definition of continuity implies topological definition
3. Complex numbers

January 25

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 25

1. Trapezoid
2. Limit
3. Probability question - SSN/DOB

January 26

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 26

1. Ehrenfeucht Fraisse Games
2. An arithmetico-geometric series?
3. Maclaurin series question
4. monad or not?
5. math problem

January 27

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 27

1. Limit 2
2. continuous compounding formula derivation proof

January 28

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 28

1. outer automorphisms

January 29

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 29

1. Proof of existence would be a useful start
2. Generalizing integral
3. trial and error method
4. Value of pi

January 30

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 30

1. Generalization of integral 2

January 31

Wikipedia:Reference_desk/Archives/Mathematics/2013 January 31

1. Curious Sample Spaces
2. Probability question