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math.AG2010
Comparing invariants of SK1
Tim Wouters
In this text, we compare several invariants of the reduced Whitehead group SK1 of a central simple algebra. For biquaternion algebras, we compare a generalised invariant of Suslin…
math.AG2009
L'invariant de Suslin en caractéristique positive
Tim Wouters
Pour une k-algèbre simple centrale A d'indice inversible dans k, Suslin a défini un invariant cohomologique de SK_1(A). Dans ce texte, nous généralisons cet invariant à toute k-alg…
math.AG2007
The elementary obstruction and the Weil restriction
Tim Wouters
In this text we investigate the good behaviour of the elementary obstruction, introduced by Colliot-Thelene and Sansuc. This is an obstruction to the existence of a rational points…