Tsarev A. V.
The pseudorational rank of an abelian group
We study finite-rank torsion-free abelian groups and quotient divisible
mixed groups. We consider the pseudorational rank, a new invariant for
finite-rank torsion-free groups which was introduced by A. A. Fomin,
and establish its connection with the usual rank. We find a condition
for existence of a homomorphism from one quotient divisible group into