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 2d awarded Good Answer Feb 5 comment Phase space of a system of differential equation It is not quite clear what you really want. A related problem can be found here [Basins of attracton]() Feb 5 comment How to represent one variable in terms of others in a system of equations? It doesn't make sense, 3 equations and more than 10 unknowns, moreover the first equation is just solved with respect to V0 and it doesn't appear anywhere else to be simplified more. Feb 5 comment How to represent one variable in terms of others in a system of equations? Are you sure Ctrl+Enter should work, shouldn't it be Shift+Enter? Feb 5 reviewed Close I need to write an animation of something l Feb 4 comment Riemann Zeta function definition was expanded by Euler with an infinite product series Take a look at this answer. Compare e.g. Product[1/(1 - Prime[i]^-4), {i, Infinity}]//N and Product[1/(1 - Prime[i]^-4), {i, 7}] // N, i.e. only the first 7 primes give a very good approximation. More on this topic can be found here Double series over primes. Feb 3 reviewed Approve How do I find the analytical roots of this polynomial? Feb 1 comment Simplify Class invariant $G(25)$ Try e.g. TrueQ[G[25] == N[GoldenRatio + 1/10^14]]. Even though you get true it doesn't answer the question. Feb 1 reviewed Reviewed an odd degree node . Feb 1 comment an odd degree node . not related to Mathematica programming Jan 30 reviewed Approve Getting cdf content from nice Wolfram info graphic Jan 29 comment Finding Euler spiral convergence point for powers other than 2 @Mike'Pomax'Kamermans Your graphs are slightly puzzling. I've made quite nice plots but I will be able to add them in a few days, because my version of Mathematica (10.1) involves some internal problems when exporting graphics. Jan 29 comment Finding Euler spiral convergence point for powers other than 2 @Mike'Pomax'Kamermans There is a general consensus on mathematica.stackexchange that whathever code one writes, it should be in a copyable form. As you may have seen the code written in latex cannot be easily copied. On the other hand in the Front End traditional notation is equivalent to the input form (with many restrictions though). So my intervention should be welcome, nevertheless you can edit your question to its initial form. However, I recommend to edit your question adding the code you have used to plot graphs. Jan 28 awarded Steward Jan 28 reviewed No Action Needed What would you ask Mathematica to do on a big system? Jan 28 revised Finding Euler spiral convergence point for powers other than 2 deleted 142 characters in body Jan 28 comment How do I create plots of rotated conic sections? I recommend to play around with parametric representations of conic sections Jan 28 reviewed Reviewed How do I create plots of rotated conic sections? Jan 28 revised Finding Euler spiral convergence point for powers other than 2 deleted 508 characters in body Jan 28 reviewed Approve stochastic-calculus tag wiki