17 Apr
2008
17 Apr
'08
6:36 p.m.
On Thu, Apr 17, 2008 at 5:52 PM, Dan Weston
Your reasoning differs from the usual understanding of a null product (1 or True), as compared to a null sum (0 or False):
the list of nodes for which *any path* from source to x must touch, i.e., the list of dominators of x.
Here, "any path" means all paths, a logical conjunction:
I'm not sure I agree this is the common definition of dominators, but supposing it is: the upshot is that to get what I expect, I should only ask for the dominators of nodes which I know are reachable from the source node, right? -- Denis