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Keywords:
Sullivan minimal model; orientable fibration; TNCZ; negative derivation
Sullivan minimal model; orientable fibration; TNCZ; negative derivation
Summary:
We give an example of a space $X$ with the property that every orientable fibration with the fiber $X$ is rationally totally non-cohomologous to zero, while there exists a nontrivial derivation of the rational cohomology of $X$ of negative degree.
References:
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