Geodesic
Geometric scales for varieties of algebras and quasi-identities
Matematičeskie trudy, Tome 12 (2009) no. 2, pp. 160-169

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We introduce a preorder for universal algebras with respect to their geometries. This naturally leads to the notion of the geometric scale for a variety of algebras. We investigate connections between the introduced relation and infinite quasi-identities that hold in algebras, as well as other properties of the relation and the scale. 
@article{MT_2009_12_2_a7,
     author = {A. G. Pinus},
     title = {Geometric scales for varieties of algebras and quasi-identities},
     journal = {Matemati\v{c}eskie trudy},
     pages = {160--169},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2009_12_2_a7/}
}
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A. G. Pinus. Geometric scales for varieties of algebras and quasi-identities. Matematičeskie trudy, Tome 12 (2009) no. 2, pp. 160-169. http://geodesic.mathdoc.fr/item/MT_2009_12_2_a7/