Authors: K Zainoulline 
              Publish Date: 2009/11/04
              Volume: 179, Issue: 3, Pages: 507-522 
			  
              Abstract
              We use the degree formula for connective Ktheory to study rational contractions of algebraic varieties As an application we obtain a condition of rational incompressibility of algebraic varieties and a version of the index reduction formula Examples include complete intersection rationally connected varieties twisted forms of abelian varieties and CalabiYau varieties
              
			  Keywords: