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| author | Peder O. Klingenberg <peder@klingenberg.no> | 2017-02-23 20:27:57 -0500 |
|---|---|---|
| committer | Glenn Morris <rgm@gnu.org> | 2017-02-23 20:28:40 -0500 |
| commit | f6d2ba74f80b9a055a3d8072d49475aec45c2dbe (patch) | |
| tree | 6842204b2dd57e93b8902184c4d1c45de35294ef | |
| parent | 8b912ab47bc91f54565f127abf24c97e5d46a1ba (diff) | |
| download | emacs-f6d2ba74f80b9a055a3d8072d49475aec45c2dbe.tar.gz | |
Make calc's least common multiple positive (bug#25255)
* lisp/calc/calc-comb.el (calcFunc-lcm): Return absolute value.
* doc/misc/calc.texi (Combinatorial Functions): Update for the above.
| -rw-r--r-- | doc/misc/calc.texi | 4 | ||||
| -rw-r--r-- | lisp/calc/calc-comb.el | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi index baf46f71703..7bd060189c5 100644 --- a/doc/misc/calc.texi +++ b/doc/misc/calc.texi @@ -19111,8 +19111,8 @@ the operation is left in symbolic form. @tindex lcm The @kbd{k l} (@code{calc-lcm}) [@code{lcm}] command computes the Least Common Multiple of two integers or fractions. The product of -the LCM and GCD of two numbers is equal to the product of the -numbers. +the LCM and GCD of two numbers is equal to the absolute value of the +product of the numbers. @kindex k E @pindex calc-extended-gcd diff --git a/lisp/calc/calc-comb.el b/lisp/calc/calc-comb.el index bc1ac315a01..c84ff236851 100644 --- a/lisp/calc/calc-comb.el +++ b/lisp/calc/calc-comb.el @@ -260,7 +260,7 @@ (defun calcFunc-lcm (a b) (let ((g (calcFunc-gcd a b))) (if (Math-numberp g) - (math-div (math-mul a b) g) + (math-div (math-abs (math-mul a b)) g) (list 'calcFunc-lcm a b)))) (defun calcFunc-egcd (a b) ; Knuth section 4.5.2 |