In this note, we formulate a theorem giving bounds on the powers of linear operators, in a general Banach space setting. The relevance of the theorem is illustrated by applying it to the Crank-Nicholson method for the numerical solution of the heat equation. This application yields a stability estimate in the maximum norm which amounts to an improvement over a well-known result of Serdjukova [l...

Britain?Achievements and Problems. By J. H. Nicholson. (Report sponsored by the Carnegie United Kingdom Trust and the National Council of Social Service and published by the N.C.S.S.) This report attempts to review the social consequences of rehousing policies in the country as a whole and covers not only the new towns, but also selected housing estates and expanded towns. Dr. Nicholson found m...