Local degrees of arbitrary integer value

ID: local-degrees-of-arbitrary-integer-value

In dimension two, for positive has local degree at zero, and has degree for negative . The proper map has isolated zero fiber and local degree zero, since its image misses every nearby nonreal target. These proper maps extend to the two-sphere. Taking their product with the identity of realizes the same local degrees in every dimension . In dimension one an isolated local degree is restricted to .

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