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Well quasi-ordered sets and ideals in free semigroups and algebras. (English) Zbl 0404.16010

16Rxx Rings with polynomial identity
16S50 Endomorphism rings; matrix rings
16Dxx Modules, bimodules and ideals in associative algebras
16S10 Associative rings determined by universal properties (free algebras, coproducts, adjunction of inverses, etc.)
15A24 Matrix equations and identities
20M12 Ideal theory for semigroups
20M05 Free semigroups, generators and relations, word problems
06A06 Partial orders, general
Full Text: DOI
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