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2d
answered Include more padding between tick marks and plot
2d
reviewed Approve suggested edit on Tangled up in sequences and recurrence relations
2d
comment How to use Expected values in symbolic solving
Well, I in fact did not read your reply to the end. I in between gave the answer below. Have a look.
2d
answered How to use Expected values in symbolic solving
2d
comment How to use Expected values in symbolic solving
OK, then answer please the rest of my question.
2d
comment How to use Expected values in symbolic solving
What do you mean with <a^2> and other such notations? Are you averaging them? If yes, can you specify, over which interval, with which weight? If not, please explain, what is it?
Oct
28
comment Aligning the axeslabel in a 3D list plot ($x,y,z$) (edited)?
You can in the Row use the Spacer . Like this: `Row[{Style[ Subsuperscript[Subscript["E", Subscript[N, 0]], m, a]/ Subsuperscript[Subscript["E", Subscript[N, 0]], m, m]], Spacer[30]}]]
Oct
23
comment Ordinary Differential Equation - Initialising conditions
Its a simple syntax error. Instead of your code you should write DSolve[{n'[t] == r n[t] (1 - (n[t]/k)), n[0] == n0}, n[t], t] . The difference is in n0 , rather than n_0 . With this correction you will get the answer n[t] -> (E^(r t) k n0)/(k - n0 + E^(r t) n0) . The underscore is reserved in Mma.
Oct
23
answered Solving Differential Algebraic Equations as BVP
Oct
22
comment How find solve the equation complex conjugate?
Are you sure that it is a Mathematica question, rather than a mathematical one. Indeed representing z=r Exp[I a] and substituting it into your equation one immediately gets a trivial solution r=0 and one non-trivial: r=Exp[-3 a I]with the requirement that both the left- and the right-hand sides are real. The latter gives you a=2 Pi/3 and r=1 .
Oct
22
comment Partial fraction decomposition of $1/(e^x-1)$
Define please, what is CAS?
Oct
14
comment Plot3D and NIntegrate issues
Indeed, Integrate[2*x - y, {x, -1*Sqrt[4 - y^2], Sqrt[4 - y^2]}, {y, -2, 2}] gives 0 , while NIntegrate with the same content returns an error meaasge on my machine Win7 Mma10.0. It looks like a bug for me.
Oct
13
awarded  Excavator
Oct
13
reviewed Reject and Edit suggested edit on Generate random points in a region with higher probability in a sub-region
Oct
13
revised Generate random points in a region with higher probability in a sub-region
added 8 characters in body
Oct
10
comment Dynamic interaction with a 3D plot
@Ojtwist Rationalize substitutes rational numbers instead of the decimal ones. It is not necessary, but Mma works faster in that case and the expressions look less awful. For the second question check please Menu/Help/AxisLabels
Oct
10
answered Dynamic interaction with a 3D plot
Oct
8
answered Outputting numbers symbolically
Oct
3
answered How can I get Solve to combine Sin/Cos into Tan?
Oct
2
answered Mathematica doesn't know the answer to this differential equation system