Rationality of Integral Cycles
Alexander VishikSchool of Mathematical Sciences University of Nottingham University Park Nottingham NG7 2RD, United Kingdom
In this article we provide the sufficient condition for a Chow group element to be defined over the ground field. This is an integral version of the result known for -coefficients. We also show that modulo 2 and degree cohomological invariants of algebraic varieties can not affect rationality of cycles of codimensions up to .