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| The i.c. is not ignored. It's because `NDSolve` hasn't used enough grid points for spatial discretization. Hans doesn't observe this phenomenon in version 7 because there's a silent change in prior error estimation of `NDSolve` in version 9. This... |
| I'm not sure when it's improved, but at least since _v12.3.1_, we no longer needs to split into triangle!: area[pts_] := Area[Polygon[pts], Assumptions -> {0 0} (* {28} *) |
| Cross posted [in Mma.SE](https://mathematica.stackexchange.com/q/268522/1871). Solved there. |
| Thank you for your reply. |
| Cross-posted in https://mathematica.stackexchange.com/q/261815/1871 |
| Cross-posted: https://mathematica.stackexchange.com/q/261236/1871 |
| For second error: I want to save the result of NDSolve[] to slider. I think when the first error is solved. The second error will be solved automatically. |
| This is unusual. It appears to be a quick rewrite of ["Standard Packages for Mathematica 3":][1] which has the same first sentence "The Durbin-Watson d statistic is used for testing the existence of a first-order autoregressive process" on page... |
| Hello Rohit, that looks great, but on my system that doesn't work. I don't know why, there is a Part - Error. Ok, I am using a hand-axe material out of the stone - age. Part::partw: Part 1 of {} does not exist. >> Part::pspec: Part... |
| But how can I get the corresponding international phonetic alphabet (IPA)? `WolframAlpha` doesn't seem to help. |