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Extensions of maps to the projective plane

Jerzy Dydak·Michael Levin
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Abstract

It is proved that for a 3-dimensional compact metrizable space X the infinite real projective space is an absolute extensor of X if and only if the real projective plane is an absolute extensor of X.

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Jerzy Dydak, Michael Levin. 2005-12-11. Extensions of maps to the projective plane. https://doi.org/10.2140/agt.2005.5.1711

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