# Corrections

In this column recently we erroneously quoted Michigan state Senator Carl Levin as saying, “a mapping $\phi: M \rightarrow M$ for a manifold M is structurally stable if any $C^r$ perturbation is topologically conjugate to $\phi$, where $C^r$ is a function $\psi$ such that $\psi$ is close to $\phi$ and that the first r derivatives of $\psi$ are also close to the respective derivatives of $\phi$”. State Senators are notoriously shy, reclusive, almost mythological creatures and it was not our intention to embarrass one by printing his name where anyone might see it. We apologize for the error.

## Author: Joseph Nebus

I was born 198 years to the day after Johnny Appleseed. The differences between us do not end there. He/him.

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