Because the result is unipartite, not bipartite.
The development of igraph has moved to github, so please do not comment on this bug here. You are of course welcome to comment on github, here: https://github.com/igraph/igraph/issues/255
Bug watches keep track of this bug in other bug trackers.
The development of igraph has moved to github, so please do not comment on this bug here. You are of course welcome to comment on github, here: /github. com/igraph/ igraph/ issues/ 255
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