1. An example of a fiber in fibrations whose Serre spectral sequences collapse Creator: Yamaguchi, Toshihiro Format: bez média and svazek Type: model:article and TEXT Subject: Sullivan minimal model, orientable fibration, TNCZ, and negative derivation Language: English Description: 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. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public