No faltaba nada: el cuaderno de matemáticas, el cuaderno de checo, ellibro de cienciasnaturales. Everything was there: the math notebook, the Czech notebook,the science textbook. Literature Se trataba de una idea que Mike había tomado de unlibro de cienciaque había leído. ...
approach to non-abelian cohomology [4] and, using the notion of a crossed bimodule, a second pointed set of cohomology is defined with coefficients in a crossed module, and Guin's six-term exact cohomology sequence is extended to a nine-term exact sequence of cohomology up to dimension 2...