topic Re: One task - 2 ODEs: why not solution? in Mathcad https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297316#M116023 <HTML><HEAD></HEAD><BODY><P>Thanks,</P><P>but sorry - I cannot open Prime 4 - show please the picture of attach pdf!</P></BODY></HTML> Sat, 27 May 2017 14:12:35 GMT ValeryOchkov 2017-05-27T14:12:35Z One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297314#M116021 <HTML><HEAD></HEAD><BODY><P><IMG 116364="" /></P><P><IMG __jive_id="_pastedImage_0.png'" style="max-height: 900px; max-width: 1200px;" /></P><P><IMG class="jive-image image-3" src="https://community.ptc.com/legacyfs/online/116365_pastedImage_1.png" style="max-height: 900px; max-width: 1200px;" /></P></BODY></HTML> Thu, 03 May 2018 13:35:47 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297314#M116021 ValeryOchkov 2018-05-03T13:35:47Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297315#M116022 <HTML><HEAD></HEAD><BODY><P>Valery,</P><P>I think it's because of non linearity of the derivation of y(t).</P><P>There may not be y'(t)²- The terms of the higest derivation has to be linear. It's a typical Mathcad Problem.</P><P></P><P>Derive the Energy-Equation to the variable t, and all will be fine.</P><P>See attachement please.</P><P>Volker</P></BODY></HTML> Sat, 27 May 2017 10:18:38 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297315#M116022 vlehner 2017-05-27T10:18:38Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297316#M116023 <HTML><HEAD></HEAD><BODY><P>Thanks,</P><P>but sorry - I cannot open Prime 4 - show please the picture of attach pdf!</P></BODY></HTML> Sat, 27 May 2017 14:12:35 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297316#M116023 ValeryOchkov 2017-05-27T14:12:35Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297317#M116024 <HTML><HEAD></HEAD><BODY><P>Ah, ok.</P><P>here the pdf-worksheet.</P></BODY></HTML> Sat, 27 May 2017 14:35:49 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297317#M116024 vlehner 2017-05-27T14:35:49Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297318#M116025 <HTML><HEAD></HEAD><BODY><P>The Odesolve - no solution.</P><P>The old good Euler - one haft solution.</P><P>???</P><P><IMG alt="Euler.png" class="jive-image image-1" src="https://community.ptc.com/legacyfs/online/116381_Euler.png" style="width: 620px; height: 556px;" /></P></BODY></HTML> Sun, 28 May 2017 05:07:07 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297318#M116025 ValeryOchkov 2017-05-28T05:07:07Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297319#M116026 <HTML><HEAD></HEAD><BODY><P>Das ist mir zu kompliziert und man hat eh nur die halbe Lösung.</P><P></P><P>Erforderlich ist ein Odesolve, das dem Ingenieur schnelle und unkomplizierte Dienste leistet.</P><P>Andere Programme können dies- warum MathCad nicht?</P></BODY></HTML> Sun, 28 May 2017 12:53:38 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297319#M116026 vlehner 2017-05-28T12:53:38Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297320#M116027 <HTML><HEAD></HEAD><BODY><P>English-Deutsch-Русский</P><P>Это тот редкий случай, когда ОДУ решается символьно, но не решается численно. Вернее, решается наполовину!</P><P>Поздравим всех нас с таким открытием!</P></BODY></HTML> Sun, 28 May 2017 16:23:10 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297320#M116027 ValeryOchkov 2017-05-28T16:23:10Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297321#M116028 <HTML><HEAD></HEAD><BODY><P>One more solution</P><P><IMG alt="Iesolve.png" class="jive-image image-3" src="https://community.ptc.com/legacyfs/online/116404_Iesolve.png" style="width: 620px; height: 565px;" /></P><P></P><P><IMG alt="Iesolve-s.png" class="jive-image image-2" src="https://community.ptc.com/legacyfs/online/116402_Iesolve-s.png" style="width: 620px; height: 191px;" /></P><P></P><P>Maple</P><P><IMG alt="Iesolve-s-Maple.png" class="image-4 jive-image" src="https://community.ptc.com/legacyfs/online/116405_Iesolve-s-Maple.png" style="width: 620px; height: 190px;" /></P></BODY></HTML> Mon, 29 May 2017 06:42:13 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297321#M116028 ValeryOchkov 2017-05-29T06:42:13Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297322#M116029 <HTML><HEAD></HEAD><BODY><P>Intsolve() is not dokumented in MP4.</P><P>How can that be?</P><P>Is it dokumented in MP3.1?</P></BODY></HTML> Mon, 29 May 2017 07:23:55 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297322#M116029 vlehner 2017-05-29T07:23:55Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297323#M116030 <HTML><HEAD></HEAD><BODY><P>It is for <A href="https://community.ptc.com/group/1150">Mathcad PM (Prime Minister)</A></P></BODY></HTML> Mon, 29 May 2017 07:40:42 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297323#M116030 ValeryOchkov 2017-05-29T07:40:42Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297324#M116031 <HTML><HEAD></HEAD><BODY><P>Simple solution. Зачем усложнять исходное ДУ?</P><P><IMG alt="telo_vverch.png" class="jive-image image-1" src="https://community.ptc.com/legacyfs/online/116411_telo_vverch.png" style="height: 400px; width: 620px;" /></P><P>Viktor</P></BODY></HTML> Mon, 29 May 2017 10:15:26 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297324#M116031 ViktorKorobov 2017-05-29T10:15:26Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297325#M116032 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE><TABLE border="1"><TBODY><TR><TD> <P>Viktor Korobov написал(а):</P> <P></P> <P>Simple solution. Зачем усложнять исходное ДУ?</P> <P></P> <P>Viktor</P> </TD></TR></TBODY></TABLE></BLOCKQUOTE><P></P><P><SPAN style="color: windowtext; font-size: 10pt;">Thanks, Viktor! But</SPAN></P><P></P><P><SPAN style="color: windowtext; font-size: 18pt;"><STRONG>Движение — всё, цель — ничто</STRONG></SPAN></P><P></P><P><SPAN style="color: windowtext; font-size: 18pt;"><STRONG>Der Weg ist das Ziel</STRONG></SPAN></P></BODY></HTML> Mon, 29 May 2017 13:25:39 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297325#M116032 ValeryOchkov 2017-05-29T13:25:39Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297326#M116033 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #222222; font-family: sans-serif; font-size: 14px;">— Лабор ист эст ипсе волюмпас! Что означает,труд уже сам по себе есть наслаждение (незабвенный фильм "Формула любви").</SPAN></P><P><SPAN style="color: #222222; font-family: sans-serif; font-size: 14px;">More simple solution:</SPAN></P><P><SPAN style="color: #222222; font-family: sans-serif; font-size: 14px;"><IMG alt="telo_vverch2.png" class="jive-image image-1" src="https://community.ptc.com/legacyfs/online/116412_telo_vverch2.png" style="height: 329px; width: 620px;" /></SPAN></P><P><SPAN style="color: #222222; font-family: sans-serif; font-size: 14px;">Viktor<BR /></SPAN></P></BODY></HTML> Mon, 29 May 2017 14:20:08 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297326#M116033 ViktorKorobov 2017-05-29T14:20:08Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297327#M116034 <HTML><HEAD></HEAD><BODY><P>Yes! Labor est etiam ipse voluptas!</P><P>It is all around this article</P><P><A href="http://twt.mpei.ac.ru/ochkov/Polygon.pdf" title="http://twt.mpei.ac.ru/ochkov/Polygon.pdf">http://twt.mpei.ac.ru/ochkov/Polygon.pdf</A></P><P>See please the end of it - Ньютон и Лагранж Лейбницу: "Третьим будешь?"</P><P><IMG __jive_id="116419" class="jive-image image-1" src="https://community.ptc.com/legacyfs/online/116419_pastedImage_0.png" style="max-height: 900px; max-width: 1200px;" /></P></BODY></HTML> Mon, 29 May 2017 15:08:51 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297327#M116034 ValeryOchkov 2017-05-29T15:08:51Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297328#M116035 <HTML><HEAD></HEAD><BODY><P>not in 3.0</P><P></P><P>Is it April 1st?</P></BODY></HTML> Tue, 30 May 2017 14:16:13 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297328#M116035 Fred_Kohlhepp 2017-05-30T14:16:13Z Re: One task - 2 ODEs: why not solution? https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297329#M116036 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE><TABLE border="1"><TBODY><TR><TD> <P>Fred Kohlhepp написал(а):</P> <P></P> <P>not in 3.0</P> <P></P> <P></P> </TD></TR></TBODY></TABLE></BLOCKQUOTE><P></P><P>And not for Prime 4, 3.1, 2, 1. Mathcad 15, 14, 13, 12, 11, 2001i, 2000, 8, 7, 6, 5, 4, 3.5. 3.</P><P>Don't know 2 and 1.</P></BODY></HTML> Tue, 30 May 2017 17:28:55 GMT https://community.ptc.com/t5/Mathcad/One-task-2-ODEs-why-not-solution/m-p/297329#M116036 ValeryOchkov 2017-05-30T17:28:55Z