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THEMATIC PROGRAMS |
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November 21, 2024 | ||||
Ontario Non-Commutative Geometry Seminar November 5 & 12 , 2002 -- 2:00 pm
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(Continued from previous talks about zeta functions and noncommutative residues for pseudo-differential operators.)
We introduce the notion of spectral triple and explain a general local index theorem of Connes-Moscovici (1995, GAFA) for spectral triples. The zeta function method plays an important role here. The noncommutative residue was extended by Connes and Moscovici to a general context for spectral triples.
As an application of the general theorem, we introduce the spectral
triples for
transversally elliptic operators. The dimension spectrum for such a
spectral triple consists of rational numbers, with non-simple poles
but bounded multiplicities (rare in other known examples). The index
of such a spectral triple index is decided by its full symbol (simply
put, it is computable).
This talk is expository, with follow-ups to explain more details.
For more details on the thematic year, see Program Page