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when toggle format what by license comment
Sep 2, 2018 at 15:29 comment added Paradox Sorry, I forgot the "submodular" condition in the body.
Sep 2, 2018 at 9:30 comment added Yonatan N I think the author meant to specify that $f$ is submodular. Though not in the body, (s)he says as much in the title. You can still pull off a similar construction.
Sep 1, 2018 at 23:40 history answered D.W. CC BY-SA 4.0