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| revision 3368 by jfenwick, Fri Nov 19 05:59:46 2010 UTC | revision 3369 by gross, Fri Nov 19 06:26:11 2010 UTC | |
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| # | Line 1619 def whereZero(arg,tol=None,rtol=math.sqr | Line 1619 def whereZero(arg,tol=None,rtol=math.sqr |
| 1619 | """ | """ |
| 1620 | if tol == None: | if tol == None: |
| 1621 | if not isinstance(arg,Symbol): | if not isinstance(arg,Symbol): |
| 1622 | if rtol<=0: raise ValueError,"rtol must be non-negative." | if rtol<0: raise ValueError,"rtol must be non-negative." |
| 1623 | tol = Lsup(arg)*rtol | tol = Lsup(arg)*rtol |
| 1624 | else: | else: |
| 1625 | tol=0. | tol=0. |
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