Wikipedia:Reference desk/Archives/Mathematics/September 2008

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September 1

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 1

1. Distance along sine curve
2. Perfect square trinomial
3. 10 marbles
4. bernoulli trials with unique p

September 2

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 2

1. exponential increase

September 3

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 3

1. hilbart space
2. for a proof
3. Complicated Maths Question
4. A bit of a strange question...
5. Peanut shaped

September 4

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 4

1. Plot request
2. Calculator for student in college

September 5

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 5

1. How many different song variations are there?
2. Differential equation

September 6

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 6

1. heights and distance
2. Surds

September 7

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 7

1. solenoidal and irrotational field
2. Calculus of variations spring problem
3. Help

September 8

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 8

1. The Hawthorne Effect and "improvements due to monitoring" of performance
2. Differentiation
3. mathematical representation of geography
4. questions about polynomials

September 9

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 9

1. Acceleration dependent on position
2. About statistics
3. Index numbers
4. statistics

September 10

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 10

1. Query regarding divisibilty
2. What are the rules of treating differentials?
3. mathematician name for famous subset of whole #'s 1,2,3,5,8,13,21  ?

September 11

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 11

1. Origin Of The Concept Of Zero?
2. Followup to [http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Archives/Mathematics/2008_August_1#Statistics an earlier question]

September 12

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 12

1. how to predict the next number with 4 digits
2. What did they use before graphing calculators?

September 13

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 13

1. Calculus Question
2. What are the chances

September 14

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 14

1. Validity of proof
2. Would like a math expert to look over my experimentation with a simple physics equation
3. numerical analysis
4. Is impulse related to work?
5. earliest date of use or description

September 15

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 15

1. having problems with conversion of measurements
2. Annual Percentage Rate
3. combinatorics question
4. Population and area question
5. Word Problem- how to setting up the equations
6. Combinations
7. ms^-3
8. Gauss and triangular numbers

September 16

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 16

1. Constructible numbers
2. Baffling Proportions Problem

September 17

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 17

1. Functions
2. differential equation
3. combinations and permutaions

September 18

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 18

1. Formula for planet temperature
2. Finding an average flood height overtime
3. Word for the "terms" in a union
4. 0 dimensional object in 4 dimensional world
5. Elliptic Curves Isomorphism
6. Is there any limitation to defining all x in Q as...
7. Algebra

September 19

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 19

1. probability

September 20

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 20

1. Planes and Spheres
2. Radius vs. radian
3. Integration
4. functions
5. Algebra

September 21

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 21

1. Puzzle
2. Elliptic curves with isomorphic group structure that are not isomorphic

September 22

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 22

1. Dedekind cuts
2. Find the natural domain and correspong range of this function...
3. Rearranging equations
4. Mean of circular quantities

September 23

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 23

1. Calculating risk for insurance
2. Rows and columns
3. Seeking lightweight modal logic book
4. inverse function
5. Logarithms
6. Limit Question
7. Using only the numbers 1,2,4,8 and do any operation (+*- () ) to them except for powers to make 27 ? YOU MAY ONLY USE EACH NUMBER ONCE!

September 24

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 24

1. Beta Distribution Selection
2. The 1-D Wave Equation (d'Alembert)
3. Graph theory question-- order of magnitude of possible set-of-visited-points....
4. Integration by substitution
5. re-encrypting an encrypted file

September 25

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 25

1. MATH RIDDLE THAT I'VE BEEN TRYING TO FIGURE OUT FOREVER
2. Integration in Matlab
3. 8,101,265,822,784

September 26

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 26

1. Correlation Coefficients
2. square feet

September 27

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 27

1. Monochromatic triangles in a graph
2. Integration Question

September 28

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 28

1. How to calculate maximum volume of a box made with a 7x9 inch paper.
2. Using the Fundamental Theorem of Calculus
3. Differentiation of sin(ax - b) with respect to x.

September 29

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 29

1. Is this true?

September 30

Wikipedia:Reference_desk/Archives/Mathematics/2008 September 30

1. calculating thickness of plated metal