Re: [Boost-users] [graph] edmund_karp_max_flow vs kolmogorov_max_flow color map

10 Mar 2007

      Hi François,

On 3/9/07, Stephan Diederich  wrote:
...
Hi,
On 3/7/07, François Duranleau  wrote:
...
On Wed, 7 Mar 2007, Stephan Diederich wrote:
...
On 3/6/07, François Duranleau  wrote:
...
It seems there is an inconsistency (to me) between color tagging of
vertices in edmund_karp_max_flow and kolmogorov_max_flow algorithms.
[snip]
Hm, I am confused. I compiled and run your example, and yes, the results
...
are identical... But with the following example, I get inversed colors,
and the flow returned by edmund_karp_max_flow is 0. What am I doing
wrong?
I use gcc-4.0.3 and Boost head cvs. I also tried with 1.33.1+kolmogorov,
same thing.
You're absolutely right. kolmogorov_max_flow uses exactly the inversed
colors - which is bad. My previous example had a bug. I found it after
reading your comment about the color_map. edmunds_karp creates one of its
own if it doesn't find it in the named properties.
I'll change the colors of kolmogorov_max_flow and report it to the list,
once it's done.

Thanks for pointing out this inconsistency!

Cheers,
Stephan