Well, it is simply > coerce :: a -> b > coerce _ = undefined
so coerce is simply empty function. But still, it is possible to write a function of type (a->b). Well, possibly I didn't write anything particularly new, but please excuse me for I'm still in sort of a shock after I've discovered it. Yet this function reminds me how little I know so I have a question for you. I didn't took any lectures in Category Theory (for I'm still just a student, and I won't for there are none in my institute), but are there any good (e)books you would recommend for a (future) computer scientist? Regards Christopher Skrzętnicki
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