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Mar
24
revised Solving a single-variable equation mixed with exponential and algebraic
edited body
Mar
21
reviewed Close Cannot figure out how to write a formula as input
Mar
15
comment How to find Multiple Maxima/Minima
There is a package RootSearch for 1-dimensional functions, in case you can recast your problem to be such. Maybe you have a quite value for one of the parameters and only need to minimize with respect to the other.
Mar
13
revised System stochastic nonlinear differential equation, Ito process?
added 1 character in body
Mar
12
comment How to rewrite the rules in a list when they satisfy a given condition
Is the right hand side of the rules always linear in the parameters ?
Mar
11
revised Missing elements using FinancialData
added 52 characters in body
Mar
6
comment Two identical functions give different answers
In general, why including your integration variables in the arguments ?
Mar
4
comment Real integral giving imaginary answer
I meant NIntegrate gives the correct result so you should consider using it. As to the second question lookup NumericQ and PatternTest in the documentation.
Mar
4
comment Real integral giving imaginary answer
That is the result of Nintegrate.
Feb
28
reviewed Close How to converrt RGB to YCbCr
Feb
28
reviewed Close How to change the form $A\cos \omega t + B\sin \omega t$ into the form $\sqrt{A^2+B^2}\cos(\omega t-\phi)$
Feb
28
comment Diagonal minors of matrix
Can't you use Diagonal instead of Identity in your second example ?
Feb
27
comment How to find and verify relationships between functions?
For your example you can also use FunctionExpand[Hypergeometric0F1[1, -x^2]].
Feb
27
comment How to find soccer balls in an image?
Also this.
Feb
19
revised Finding roots of a function with a varying parameter
added 11 characters in body
Feb
13
revised Boolean algebra does not simplify
added 5 characters in body
Feb
13
comment Evaluating an integral
The usual trick seems to work though : FullSimplify[ Integrate[ w/(2 Pi I (w - z)), {w, 1, 1 + I, -1 + I, -1 - I, 1 - I, 1}, Assumptions -> {Abs[z] < 1}], Assumptions -> {Abs[z] < 1}] and FullSimplify[ Integrate[ 1/(2 Pi I (w - z)), {w, 1 + I, -1 + I, -1 - I, 1 - I, 1 + I}, Assumptions -> {Abs[z] < 1}], Assumptions -> {Abs[z] < 1}].
Feb
10
reviewed Edit Solve a stochastic equation analytically
Feb
10
revised Solve a stochastic equation analytically
typo error in title, other typo
Feb
6
asked Build expression interactively