Hackbusch Wolfgang Elliptic differential equations: Theory and nuberical treatment - 2 - Germany Springer 2017 - xiv,455p. ill. cm - Springer series in computational mathematics 18 . References 429-442p.; Index449-455p. ISBN: 9783662549605 (HBK) Standard No.: 200798 Source: 71, 22/01/2019, Aviva Books Company Textual Subjects--Topical Terms: Poisson equatino Potential equation Variational formulationMathematics Dewey Class. No.: B392L8, Q7