On Spaces of connected Graphs I Properties of Ladders
نویسندگان
چکیده
We examine spaces of connected tri-/univalent graphs subject to local relations which are motivated by the theory of Vassiliev invariants. It is shown that the behaviour of ladder-like subgraphs is strongly related to the parity of the number of rungs: there are similar relations for ladders of even and odd lengths, respectively. Moreover, we prove that under certain conditions an even number of rungs may be transferred from one ladder to another.
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تاریخ انتشار 2008