Re: [Boost-users] math tools roots

Subject: Re: [Boost-users] math tools roots
From: John Maddock (boost.regex_at_[hidden])
Date: 2011-10-10 11:56:09

> When evaluating a limit, one does not simply substitute the limiting value 
> into the expression.  The limit is the value of the expression as the 
> variable gets arbitrarily close but not equal to the limiting value.  As x 
> gets arbitrarily close to 0, 0/x remains exactly 0.  I have no clue, how 
> this impacts the original issue.

Just to say that the mathematical definition of 0/0 is irrelevant in this 
context - the point is that if both ends of the range are zero - then our 
root finding has converged.  The evaluation of 0/0 in this code was a 
mistake, pure and simple.

John.