Re: [pure-lang-users] math.pure

[John C. <co...@cc...>]

Eddie Rucker scripsit:

> The user must determine the domain they are going work in. No different
> than working with OCaml.

	A running joke was an acceptance test for nascent Common Lisp
	implementations developed by Guy Steele. It was in three
	parts. First you type T; if it responds T, it passes part
	1. Second, you define the factorial function and then calculate
	(/ (factorial 1000) (factorial 999)).  If it responds 1000,
	it passes part 2. Third, you try (atanh -2). If it returns
	a complex number, it passes; extra credit if it returns the
	correct complex number. It was a long time before any Common
	Lisp implementation passed the third part.
		--Steele and Gabriel, "The Evolution of Lisp"

Common Lisp: The Language lays down explicitly that (expt -8 1/3) must
not return -2, as -2 is not the *principal* cube root of -8; instead it
should return #C(1.0 1.7320508).

-- 
They tried to pierce your heart                 John Cowan
with a Morgul-knife that remains in the         http://www.ccil.org/~cowan
wound.  If they had succeeded, you would
become a wraith under the domination of the Dark Lord.         --Gandalf