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[Emacs-diffs] Changes to emacs/lisp/calc/calc-arith.el
From: |
Jay Belanger |
Subject: |
[Emacs-diffs] Changes to emacs/lisp/calc/calc-arith.el |
Date: |
Mon, 29 Nov 2004 17:47:30 -0500 |
Index: emacs/lisp/calc/calc-arith.el
diff -c emacs/lisp/calc/calc-arith.el:1.8 emacs/lisp/calc/calc-arith.el:1.9
*** emacs/lisp/calc/calc-arith.el:1.8 Thu Nov 25 06:28:25 2004
--- emacs/lisp/calc/calc-arith.el Mon Nov 29 22:41:10 2004
***************
*** 1740,1762 ****
(math-normalize (list '^ a b)))
(defun math-pow-of-zero (a b)
! (if (Math-zerop b)
! (if calc-infinite-mode
! '(var nan var-nan)
! (math-reject-arg (list '^ a b) "*Indeterminate form"))
! (if (math-floatp b) (setq a (math-float a)))
! (if (math-posp b)
! a
! (if (math-negp b)
! (math-div 1 a)
! (if (math-infinitep b)
! '(var nan var-nan)
! (if (and (eq (car b) 'intv) (math-intv-constp b)
! calc-infinite-mode)
! '(intv 3 (neg (var inf var-inf)) (var inf var-inf))
! (if (math-objectp b)
! (list '^ a b)
! a)))))))
(defun math-pow-zero (a b)
(if (eq (car-safe a) 'mod)
--- 1740,1774 ----
(math-normalize (list '^ a b)))
(defun math-pow-of-zero (a b)
! "Raise A to the power of B, where A is a form of zero."
! (if (math-floatp b) (setq a (math-float a)))
! (cond
! ;; 0^0 = 1
! ((eq b 0)
! 1)
! ;; 0^0.0, etc., are undetermined
! ((Math-zerop b)
! (if calc-infinite-mode
! '(var nan var-nan)
! (math-reject-arg (list '^ a b) "*Indeterminate form")))
! ;; 0^positive = 0
! ((math-posp b)
! a)
! ;; 0^negative is undefined (let math-div handle it)
! ((math-negp b)
! (math-div 1 a))
! ;; 0^infinity is undefined
! ((math-infinitep b)
! '(var nan var-nan))
! ;; Some intervals
! ((and (eq (car b) 'intv)
! calc-infinite-mode
! (math-negp (nth 2 b))
! (math-posp (nth 3 b)))
! '(intv 3 (neg (var inf var-inf)) (var inf var-inf)))
! ;; If none of the above, leave it alone.
! (t
! (list '^ a b))))
(defun math-pow-zero (a b)
(if (eq (car-safe a) 'mod)