JournalspmVol. 67 / No. 4DOI 10.4171/pm/1875

Urcohomologies and cohomologies of <var>N</var>-complexes

  • Naoya Hiramatsu

    Okayama University, Japan
  • Goro C. Kato

    California Polytechnic State University, San Luis Obispo, USA
Urcohomologies and cohomologies of <var>N</var>-complexes cover

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For a general sequence of objects and morphisms, we construct two N-complexes. Then we can define cohomologies (i, k)-type of the N-complexes not only on a diagonal region but also in the triangular region. We obtain an invariant defined on a general sequence of objects and morphisms. For a short exact sequence of N-complexes, we get the associated long exact sequence generalizing the classical long exact sequence. Lastly, several properties of the vanishing cohomologies of N-complexes are given.