kpeter [Thu, 13 Nov 2008 15:29:04 +0000] rev 2629
Improved constructors for min cost flow classes
Removing the non-zero lower bounds is faster
kpeter [Thu, 13 Nov 2008 10:54:42 +0000] rev 2628
Improve tree update procedure in NetworkSimplex
The new method updates a smaller subtree (fixing a bug) and shifting the
potentials with a costant value.