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- URN zum Zitieren dieses Dokuments:
- urn:nbn:de:bvb:355-epub-205128
- DOI zum Zitieren dieses Dokuments:
- 10.5283/epub.20512
Zusammenfassung
Let M be a closed manifold and let CL•(M) be the algebra of classical pseudodifferential operators. The aim of this note is to classify trace functionals on the subspaces CLa(M) ⊂ CL•(M) of operators of order a. CLa(M) is a CL0(M)–module for any real a; it is an algebra only if a is a non–positive integer. Therefore, it turns out to be useful to introduce the notions of pretrace and hypertrace. ...
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