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When almost multiplicative morphisms are close to homomorphisms
Authors:Huaxin Lin
Institution:Department of Mathematics, East China Normal University, Shanghai 200062, China
Abstract:It is shown that approximately multiplicative contractive positive morphisms from $C(X)$ (with dim $X\le 2$) into a simple $C^*$-algebra $A$ of real rank zero and of stable rank one are close to homomorphisms, provided that certain $K$-theoretical obstacles vanish. As a corollary we show that a homomorphism $h: C(X)\to A$ is approximated by homomorphisms with finite dimensional range, if $h$ gives no $K$-theoretical obstacle.

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