Given its abstract nature and the highly syntactical competence required by the use of symbolic algebra, research on its teaching and learning must rely on approaches that include semiotic concepts and analyses that recall the history of algebraic ideas, among others. "Educational Algebra: A Theoretical and Empirical Approach" deals with a ...
About 60 years ago, R. Brauer introduced "block theory"; his purpose was to study the group algebra kG of a finite group G over a field k of nonzero characteristic p: any indecomposable two-sided ideal that also is a direct summand of kG determines a G-block.But the main discovery of Brauer is perhaps the existence of families of infinitely many ...
Lluis Puig Casas was not affiliated to any particular poltical party byt sympathised with the Catalan right. When the uprising began he was caught in the violence unleashed in the first months of war. The uprising did not succed in Barcelona but it was followed by an attempt to carry out a social revolution. His brother was killed by anarchist ...
This text gives a description of the source algebra of a Brauer block which has been discovered by the author. It should be of interest to researchers and postgraduate students interested in finite groups or noncommutative algebras.
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