Abstract
We classify all polynomial maps of degree at most 2 from the n-sphere to the 2-sphere over any field.
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ACKNOWLEDGMENT
The author is partially supported by the Ministerio de Ciencia y Tecnologí a grant MTM2007-60016 and by the Junta de Andalucí a grant FQM-213.
Notes
Communicated by I. P. Shestakov.