#4988: major easy-to-fix but STUPID bug in gcd
---------------------------+------------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-3.3
Component: number theory | Keywords:
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This is stupid:
{{{
sage: gcd(3,6,2)
3
}}}
The problem is that there is an undocumented mysterious and not even used
integer third input!
{{{
File: /Users/was/s/local/lib/python2.5/site-
packages/sage/rings/arith.py
Type: <type 'function'>
Definition: gcd(a, b, integer, **kwargs)
Docstring:
The greatest common divisor of a and b, or if a is a list and b is
omitted the greatest common divisor of all elements of a.
INPUT:
a,b -- two elements of a ring with gcd
or
a -- a list or tuple of elements of a ring with gcd
Additional keyword arguments are passed to the respectively called
methods.
EXAMPLES:
sage: GCD(97,100)
1
sage: GCD(97*10^15, 19^20*97^2)
97
sage: GCD(2/3, 4/3)
2/3
sage: GCD([2,4,6,8])
2
sage: GCD(srange(0,10000,10)) # fast !!
10
}}}
This caused me a ton of confusion just now.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4988>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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