Pipe
Reputation
431
Next privilege 500 Rep.
Access review queues
 Mar23 comment NDSolve in exact points - nonlinear equation (Degrees and Radians confusion) I think I can handle, thank you very much Mar23 comment NDSolve in exact points - nonlinear equation (Degrees and Radians confusion) just for first cycle Mar23 comment NDSolve in exact points - nonlinear equation (Degrees and Radians confusion) I need position of z, velocity z', angular velocity ϕ' and angular acceleration ϕ'' for various ϕ which I choose and for which t. It should be table of 6x7 of data? {z[t], z'[t], ϕ'[t], ϕ''[t], z''[t], t} Mar23 asked NDSolve in exact points - nonlinear equation (Degrees and Radians confusion) Mar23 comment Solutions of cubic equation D>0 or D<0 thank you very much. I just wanted to see which substitutions did you use for presenting the solutions. Mar22 comment Solutions of cubic equation D>0 or D<0 @ubpdqna code is great and everything is working. I just followed the code and in the last step I thought that if I substitute parameters I obtain in the last step {-1.03412, -1.03412, 0.467062 - 0.865364 I, 0.467062 + 0.865364 I, 0.467062 - 0.865364 I, 0.467062 + 0.865364 I} and solutions which code gave is {{x -> -0.000500125}, {x -> -0.000250062 - 0.316228 I}, {x -> -0.000250062 + 0.316228 I}}. My question is how to see roots in analytic form which you used in the code? Mar22 comment Solutions of cubic equation D>0 or D<0 @ubpdqna I have one thing which is not clear, why the last step Simplify[Chop[ps - a2/3]] is not giving solutions the same with NSolve[0 == 0.0000500125 + 0.100000250125 x + 0.00100025` x^2 + x^3,x] if I set parameters immediately on the beginning? Mar22 comment Solutions of cubic equation D>0 or D<0 ubpdqn Thank you very very much, it was my mistake in understanding any way. Mar22 accepted Solutions of cubic equation D>0 or D<0 Mar22 revised Solutions of cubic equation D>0 or D<0 added 181 characters in body; edited title Mar22 asked Solutions of cubic equation D>0 or D<0 Mar15 comment Symbolic solution of irrational equation congrats Artes, I didn't know that this is possible to do. But I think in any case big knowledge is necessary for this Mar15 accepted Symbolic solution of irrational equation Mar15 asked Symbolic solution of irrational equation Mar12 comment How to apply RootLocusPlot corectly @Öskå I picked up the point just on the part of the question already asked. To take a look is it better for understanding because the problem is more complex that I thought.My previous question is large and consists of few parts. I didn't get any sign for further analysis. Mar12 asked How to apply RootLocusPlot corectly Mar12 revised Mapping the imaginary axis of the complex (s) plane edited title Mar11 comment Mapping the imaginary axis of the complex (s) plane @bill s I tried RootLocusPlot[a6 r^2-a1 a3 k^4 - a2 a4 (-k a5 + r)^2], {k, 0, 0.01000}] but it is not that diagram Mar11 revised Mapping the imaginary axis of the complex (s) plane deleted 1 characters in body Mar11 revised Mapping the imaginary axis of the complex (s) plane edited title