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math.GR2004
Characterization of matrix types of ultramatricial algebras
Gábor Braun
A dimension group is a partially ordered countable group such that (1) every finite subset is contained in an ordered subgroup which is a finite direct power of Z and (2) the group…
math.GR2003★ 1 cited
A proof of Higgins' conjecture
Gabor Braun
Let f: G=* G(i) -> B=* B(i) be a group homomorphism between free products of groups. Suppose that G(i)f=B(i) of all i. Let H be a subgroup of G such that Hf=B. Then H decomposes in…