# Journal of Operator Theory

Volume 38, Issue 1, Summer 1997 pp. 151-171.

An excision theorem for the K-theory of C*-algebras**Authors**: Ian F. Putnam

**Author institution:**Department of Mathematics and Statistics, University of Victoria, Victoria, B.C. V8W 3P4, CANADA

**Summary:**We consider a pair of C*-algebras $A' \subseteq A$. The K-theory of the mapping cone for this inclusion can be regarded as a relative K-group. We describe a situation where two such pairs have isomorphic relative groups.

**Keywords:**C*-algebra, K-theory.

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