Sjoerd C. de Vries
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48,696
109/100 score
 Mar 18 comment SumConvergence[((-1)^n)/(Sqrt[n] + (-1)^n), n] returns True in Version 10.2? @clburchard When there is agreement about this we can add the "bugs" tag to your question. Done now. Mar 17 comment Trying to solve an inhomogeneous differential equation, one of the initial condition equations returns “true” for some reason You probably used an assignment (= ) in an earlier version of the code instead of an == so that one of the equations is now trivially true. Clear all the variables you've used and you should be back in business. Mar 17 comment A shift of a trapezoid and a connect to the original Thanks guys! ;-) Mar 17 answered A shift of a trapezoid and a connect to the original Mar 17 comment SumConvergence[((-1)^n)/(Sqrt[n] + (-1)^n), n] returns True in Version 10.2? So, I assume you conclude that we see a bug here? Mar 17 comment SumConvergence[((-1)^n)/(Sqrt[n] + (-1)^n), n] returns True in Version 10.2? I believe you are right. I note that NSum using the AlternatingSigns method yields a slightly different result as the one above for Sum: NSum[((-1)^n)/(Sqrt[n] + (-1)^n), {n, 2, Infinity}, Method -> "AlternatingSigns"] ==> -2.67892. Sum with a finite limit yields the same set of results as your loop does. Mar 17 comment How to Extract and Rearrange Elements in Doubly-Nested Lists I may be mistaken here but wouldn't that be just NumSMatrix[[All,All,1]]? Mar 17 reviewed No Action Needed How to Extract and Rearrange Elements in Doubly-Nested Lists Mar 17 reviewed Close What does mean |sin(z)|<=1? Mar 16 revised How to speed up TextJustification in Mathematica 10 edited tags Mar 16 revised Color of figure keeps changing edited tags Mar 16 comment Granular versus terse coding You probably noted that there is this question is in the close vote queue (because it is mostly about opinions). I voted to keep this open, but more because of the quality of the question and the answers and the topic interests me than that I don't agree with the close reason. Mar 16 reviewed Leave Open Granular versus terse coding Mar 16 awarded Nice Answer Mar 15 comment Ticks on axes with a frame without frameticks You have used the Ticks option twice. Mar 15 reviewed No Action Needed How can I visualize a map $f:T^2\to T^2$? Mar 14 comment Can't access AnyOrder named parameters Same for 10.4, Win 10. Mar 13 awarded Nice Answer Mar 12 comment How to prevent extrapolation in Manipulate? I'm not using that in the last snippet Mar 12 comment How to prevent extrapolation in Manipulate? Does Manipulate[If[t > Tmax[v0, theta], t = Tmax[v0, theta]]; Show[Trajectory[t, v0, theta Pi/180], PlotRange -> {{-2, 2}, {-2, 2}, {-1, 1}}, SphericalRegion -> True], {{t, 150, Style["Time", 10]}, 0, Tmax[v0, theta], 0.1}, {{v0, 0.25, "Velocity"}, 0, 1, 0.01}, {{theta, 63.3, "Polar angle"}, 30, 150, 0.1}, ControlPlacement -> Bottom] work for you?