Abstract
A sorting technique known as the polyphase merge is described. The notationE n (p) is introduced for the effective power of the merge. It is defined for the maximal file that can be sorted withinn passes withp+1 available magnetic tape stations. Then the valueE(p)=limn→∞E n (p) is evaluated as a function ofp. UsingE(p) as a measure of efficiency the author discusses the polyphase merge comparing it with a merge technique which is essentially a combination of the polyphase and the balanced merge. To the author's knowledge this technique is new.
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