2 papers
math.GM2004
M-hyperquasivarieties
E. Graczynska, D. Schweigert
We generalize the notion of hyperquasivariety and hyperquasiidentity to the notion of M-hyperquasivariety and M-hyperquasiidentity. Birkhoff's and Malcev's type theorems are presen…
math.LO2003
Hyperquasivarieties
Ewa Graczynska, Dietmar Schweigert
In the paper we consider the notion of hyper-quasi-identities and hyperquasivarieties as a generalization of the concept of quasi-identity and quasivariety invented by A. I. Mal'ce…