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4h
comment How to make sure input is an ODE
For starters, you are trying to sole an equation numerically but some constants are not defined and you're missing the initial conditions.
4h
revised How to make sure input is an ODE
added 68 characters in body
2d
comment Possible bug of Exporting as HTMLFragment at Linux
I get your correct result on 10.1 and Fedora.
2d
comment Package for symbolic computation of christoffel symbols and parallel transports in Riemannian geometry, given the metric
Maybe 8895 will help.
Apr
22
comment How to get free-form linguistic input to act on a previous output?
May I add to your questions : has anyone managed to use free-form input on user defined variables and functions ? Something like mylist={1, 2, 3} and then = average of mylist ?
Apr
21
comment No connection to WoframAlpha with v10.1
It works for me with 10.1.0 on Windows 7 64-bit.
Apr
18
comment Construct single InterpolatingFunction from a mathematical combination of other IF's
I think that after defining g with Set (=, as you do), you can safely Remove[f] without affecting g.
Apr
17
comment How speed the calculatation of the inverse of an upper triangular matrix
Are there specific reasons why you don't use built-in functions ?
Apr
11
comment Diophantine and odd
Can't you rewrite a=2 aa + 1 and so on ?
Apr
10
comment Plotting non-linear recursive sequence
O is a protected symbol; try a different name, preferably starting with a lower case letter.
Apr
3
reviewed Edit Strange evaluation of an sum involving binomial coefficients
Apr
3
revised Strange evaluation of an sum involving binomial coefficients
improved formatting
Apr
1
revised Simplify a composition of functions
edited title
Mar
31
comment How to create a big jacobian matrix function over some variables of a vector function?
See if this answers your question.
Mar
31
comment How to create a big jacobian matrix function over some variables of a vector function?
You can define vars={x1, x2, ...} and then do D[{f1, f2, ...}, {vars}].
Mar
31
comment How to create a big jacobian matrix function over some variables of a vector function?
You can just do D[{f1, f2, f3}, {{x1, x2, x3, x4}}].
Mar
31
comment How to create a big jacobian matrix function over some variables of a vector function?
Have a look at the documentation for Differentiation.
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.