## Spectrum of $$C^*$$-algebras of pseudodifferential operators with discontinuous symbols in an open manifold.(Russian)Zbl 0599.46079

The algebra $${\mathcal A}$$ generated by zero order pseudodifferential operators on a smooth open manifold is considered. Symbols of the operators may have discontinuities of the ”first kind”. In the point of such a discontinuity there exists a limit of the symbol depending on the operator, and after completing the algebra the symbols with an everywhere dense set of discontinuities arise. The spectrum of the algebra $${\mathcal A}$$ is described, i.e., the set of equivalence classes of irreducible representation with Jacobson’s topology. It is found that $${\mathcal A}$$ is a I-type algebra.
Reviewer: O.Dumbrajs

### MSC:

 46L05 General theory of $$C^*$$-algebras 47Gxx Integral, integro-differential, and pseudodifferential operators 35S05 Pseudodifferential operators as generalizations of partial differential operators