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math.GR2004
Abnormal subgroups and Carter subgroups in some infinite groups
L. A. Kurdachenko, I. Ya. Subbotin
Some properties of abnormal subgroups in generalized soluble groups will be considered. In particular, the transitivity of abnormality in metahypercentral groups is proven. Also it…
math.GR2003
On quasi-separative semigroups
Yu. I. Krasilnikova, B. V. Novikov
We built some congruences on semigroups, from where a decomposition of quasi-separative semigroups was obtained.