Title
Direkte Methoden Der Variationsrechnung: Eine Einfhrung Unter Bercksichtigung Von Randwertaufgaben Bei Partiellen Differentialgl,Used
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Die Methoden der Variationsrechnung stellen ein wichtiges Hilfsmittel zur Behandlung von Randwertaufgaben dar, soweit sie auf ein Extremalproblem zurckgeflihrt werden knnen. Bei einer groen Klasse von Randwertaufgaben der Kontinuumsmechanik und der mathematischen Physik ist dies der Fall. Dort handelt es sich in erster Linie um Randwertaufgaben rur partielle Differentialgleichungen, und diese haben wir auch als Anwendungsbeispiele speziell im Auge. Die Methoden der Variationsrechnung sind in zweierlei Hinsicht von Bedeutung. Zum einen lassen sich mit ihrer Hilfe im Sinne der 'direkten Methode der Variationsrech nung' (C 0 u r a n und t H i I b e r [I], t Band 2) konstruktive Existenzbeweise rur die Lsung des Problems gewinnen. Man siehe hierzu etwa auch N e c a [I] s sowie Mi chi i n [I], [2]. Zum anderen lassen sich aber die konstruktiven Existenzbeweise auch zu numerischen Verfahren zur genherten Berechnung der Lsung ausbauen. Zu den bekanntesten Variationsmethoden gehren im Falle linearer Randwertaufgaben die Fehlerquadratmethode, die Energiemethode (Methode von Rayleigh und Ritz), die Methode der orthogonalen Projektion sowie die Hyperkreismethode von Prager und Synge. Ziel der vorliegenden Einflihrung ist unter anderem, diese Methoden mit ihren wechselseitigen Beziehungen darzustellen.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.