RE: Formal definitions (Re: ada-c++ productivity)

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Article #3483

#3483

From: cs450a03
Date: Sat, 13 Apr 1991 15:06

18 lines
1257 bytes

Michael Coffin writes:
>The definition of "sorted" can be translated into a logical predicate
>pretty easily.  E.g., for a list of numbers A, "A is sorted in
>ascending order" is translated to
> 
>    "for elements i and j in A, i <= j implies A[i] <= A[j]"
>
>...  It's quite different to point to a routine for quicksort and
>claim that the partitions and exchanges somehow describe
>"sortedness."

But it is not all that different to point to a routine for bubble-sort
and claim that the comparisons and exchanges somehow describe
"sortedness".

Assuming that A can be ordered.

Raul

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From: cs450a03@uc780.umd.edu
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Subject: RE: Formal definitions (Re: ada-c++ productivity)
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Date: 13 Apr 91 15:06:08 GMT
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