[racket] A type that can't be converted to a contract

From: Jens Axel Søgaard (jensaxel at soegaard.net)
Date: Sat Nov 17 15:38:08 EST 2012

2012/11/17 Neil Toronto <neil.toronto at gmail.com>:

> The best place to use this is in "math/number-theory.rkt"... which I see is
> already using it for factorial and friends. You're all set.

Worked like a charm.

Jens Axel

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