Some necessary and sufficient conditions for stability of three-layer difference schemes
Keyword(s):
This paper investigates two classes of three-layer difference schemes with weights in the form ?y?t,n+??2y?tt,n+?1Ayn-1+(E-?1-?2)Ayn+?2Ayn+1 = ?n and ?y?t,n+??2y?tt,n+A(?1yn-1+(E-?1-?2)yn+?2yn+1) = ?n. It obtains some sufficient conditions for the stability in a defined norm and, also, in special cases we achieve conditions for stability which do not depend on the choice of norm.
1991 ◽
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