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kozmoforum.hu Tudományos és ismeretterjesztő beszélgetések az Életről, a Világmindenségről, meg Mindenről. 2016-04-06T12:39:52+02:00 https://www.teszt.kozmoforum.hu/feed.php?f=9&t=262 2016-04-06T12:39:52+02:00 2016-04-06T12:39:52+02:00 https://www.teszt.kozmoforum.hu/viewtopic.php?t=262&p=8210#p8210 <![CDATA[Re: Variációs elvek]]> Statisztika: Elküldve Szerző: dgy — 2016.04.06. 12:39

]]> 2016-04-06T10:09:09+02:00 2016-04-06T10:09:09+02:00 https://www.teszt.kozmoforum.hu/viewtopic.php?t=262&p=8209#p8209 <![CDATA[Re: Variációs elvek]]> Statisztika: Elküldve Szerző: juzer — 2016.04.06. 10:09

]]> 2016-04-05T14:14:43+02:00 2016-04-05T14:14:43+02:00 https://www.teszt.kozmoforum.hu/viewtopic.php?t=262&p=8205#p8205 <![CDATA[Re: Variációs elvek]]> Statisztika: Elküldve Szerző: juzer — 2016.04.05. 14:14

]]> 2016-04-04T22:49:31+02:00 2016-04-04T22:49:31+02:00 https://www.teszt.kozmoforum.hu/viewtopic.php?t=262&p=8203#p8203 <![CDATA[Re: Variációs elvek]]> Statisztika: Elküldve Szerző: dgy — 2016.04.04. 22:49

]]> 2016-04-04T15:39:45+02:00 2016-04-04T15:39:45+02:00 https://www.teszt.kozmoforum.hu/viewtopic.php?t=262&p=8202#p8202 <![CDATA[Variációs elvek]]> Fogtam egy megoldást, aminek szerintem minimalizálnia kell: z0(t, x) = sin(x) cos(t), ahol a húr 0-tól PI-ig tart, a két vége rögzítve.
Megvariáltam a megoldást:
kis helyen különbözik csak nullától és a húr szélein nulla.



Ebbe beírtam z-t:







Az utolsó tag nulla, így:



Ha -be teszem ezt, akkor az -t tartlamazó tag előjele bármilyen lehet.

Ez mit jelent? Képzetesbe kellett volna forgatni az idot?

Statisztika: Elküldve Szerző: juzer — 2016.04.04. 15:39

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