Found 365 Documents (Results 1–100)
Quasivarieties of algebras whose compact relative congruences are principal. (English) Zbl 07903422
MSC:
08C15
Automorphisms of categories of free algebras with unit for classical varieties of non-associative algebras. (English) Zbl 07903238
Minimal monoids generating varieties with complex subvariety lattices. (English) Zbl 07852922
Reviewer: Peter Kostolányi (Bratislava)
Separable algorithmic representations of classical systems and their applications. (English. Russian original) Zbl 07803125
J. Math. Sci., New York 278, No. 3, 476-519 (2024); translation from Sovrem. Mat., Fundam. Napravl. 67, No. 4, 707-754 (2022).
Logical extensions of the parametric closure operator. (English. Russian original) Zbl 07858814
Discrete Math. Appl. 33, No. 6, 371-379 (2023); translation from Diskretn. Mat. 34, No. 3, 52-62 (2022).
On automorphisms of categories with applications to universal algebraic geometry. (English) Zbl 1524.18002
Reviewer: Hirokazu Nishimura (Tsukuba)
On idempotents of semigroup varieties of \(m\)-groups. (English. Russian original) Zbl 07763828
Russ. Math. 67, No. 6, 1-7 (2023); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2023, No. 6, 3-10 (2023).
Lower semilattices of separable congruences of numbered algebras. (English. Russian original) Zbl 07729645
Sib. Math. J. 64, No. 4, 864-876 (2023); translation from Sib. Mat. Zh. 64, No. 4, 753-769 (2023).
Groups with nilpotent \(n \)-generated normal subgroups. (English. Russian original) Zbl 1521.20055
Sib. Math. J. 64, No. 4, 847-853 (2023); translation from Sib. Mat. Zh. 64, No. 4, 733-741 (2023).
Reviewer: Enrico Jabara (Venezia)
Systems of Diophantine equations over finite configurations. (English. Russian original) Zbl 07669630
Sib. Math. J. 64, No. 2, 325-337 (2023); translation from Sib. Mat. Zh. 64, No. 2, 321-338 (2023).
On the independent axiomatizability of quasivarieties of nilpotent groups. (English. Russian original) Zbl 1531.20040
Sib. Math. J. 64, No. 1, 22-32 (2023); translation from Sib. Mat. Zh. 64, No. 1, 28-39 (2023).
Reviewer: Enrico Jabara (Venezia)
On the number of universal algebraic geometries. (English) Zbl 1536.08005
Reviewer: Ivan Chajda (Olomouc)
Categorical dualities for some two categories of lattices: an extended abstract. (English) Zbl 07811395
Computability and universal determinability of negatively representable models. (English) Zbl 07659047
Russ. Math. 66, No. 10, 16-24 (2022); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2022, No. 10, 22-32 (2022).
On the utility of Robinson-Amitsur ultrafilters. III. (English) Zbl 1524.03028
Reviewer: Martin Weese (Potsdam)
Distributive and lower-modular elements of the lattice of monoid varieties. (English. Russian original) Zbl 1509.20077
Sib. Math. J. 63, No. 6, 1069-1074 (2022); translation from Sib. Mat. Zh. 63, No. 6, 1248-1255 (2022).
Method of verbal operations and automorphisms of the category of free algebras. (English. Russian original) Zbl 1516.08003
Algebra Logic 61, No. 2, 87-103 (2022); translation from Algebra Logika 61, No. 2, 127-149 (2022).
Levi classes of quasivarieties of nilpotent groups of exponent \(p^s\). (English. Russian original) Zbl 1515.20136
Algebra Logic 61, No. 1, 54-66 (2022); translation from Algebra Logika 61, No. 1, 77-92 (2022).
On relatively elementary definability of graph classes in the class of semigroups. (English) Zbl 1515.20304
Reviewer: C. Pereira da Silva (Curitiba)
Primitive lattice varieties. (English) Zbl 1497.06004
Reviewer: Ivan Chajda (Přerov)
Nilpotency and the Hamiltonian property for cancellative residuated lattices. (English) Zbl 07538383
Identities and quasi-identities of pointed algebras. (English. Russian original) Zbl 1494.08001
Sib. Math. J. 63, No. 2, 197-205 (2022); translation from Sib. Mat. Zh. 63, No. 2, 241-251 (2022).
Reviewer: Helmut Länger (Wien)
Dynamic contact algebras with a predicate of actual existence: snapshot representation and topological duality. (English) Zbl 1511.03004
Düntsch, Ivo (ed.) et al., Alasdair Urquhart on nonclassical and algebraic logic and complexity of proofs. Cham: Springer. Outst. Contrib. Log. 22, 411-475 (2022).
Reviewer: Hirokazu Nishimura (Tsukuba)
Congruence-permutable \(S \)-acts. (English. Russian original) Zbl 1485.20143
Sib. Math. J. 63, No. 1, 167-172 (2022); translation from Sib. Mat. Zh. 63, No. 1, 202-208 (2022).
Reviewer: Jaak Henno (Tallinn)
Levi classes of quasivarieties of groups with commutator subgroup of order \(p\). (English. Russian original) Zbl 1495.20033
Algebra Logic 60, No. 5, 336-347 (2021); translation from Algebra Logika 60, No. 4, 510-524 (2021).
Reviewer: Alexander Ivanovich Budkin (Barnaul)
Undecidability of algebras of binary relations. (English) Zbl 07442316
Madarász, Judit (ed.) et al., Hajnal Andréka and István Németi on unity of science. From computing to relativity theory through algebraic logic. Cham: Springer. Outst. Contrib. Log. 19, 267-287 (2021).
Independent axiomatizability of quasivarieties of torsion-free nilpotent groups. (English. Russian original) Zbl 1515.08008
Algebra Logic 60, No. 2, 79-88 (2021); translation from Algebra Logika 60, No. 2, 123-136 (2021).
Structure of quasivariety lattices. IV: Nonstandard quasivarieties. (English. Russian original) Zbl 1487.08003
Sib. Math. J. 62, No. 5, 850-858 (2021); translation from Sib. Mat. Zh. 62, No. 5, 1049-1060 (2021).
Reviewer: Keith Kearnes (Boulder)
Algebraic geometry over algebraic structures. VIII: Geometric equivalences and special classes of algebraic structures. (English. Russian original) Zbl 1470.08001
J. Math. Sci., New York 257, No. 6, 797-813 (2021); translation from Fundam. Prikl. Mat. 22, No. 4, 75-100 (2019).
Two weaker variants of congruence permutability for monoid varieties. (English) Zbl 1484.20100
Reviewer: Jaak Henno (Tallinn)
Geometrical equivalence and action type geometrical equivalence of group representations. (English) Zbl 1491.20028
The variety generated by an ai-semiring of order three. (English) Zbl 1489.16050
Reviewer: Anna Romanowska (Warszawa)
On the quasivarieties generated by a finite group and lacking any independent bases of quasi-identities. (English. Russian original) Zbl 1498.20067
Sib. Math. J. 61, No. 6, 983-993 (2020); translation from Sib. Mat. Zh. 61, No. 6, 1234-1246 (2020).
Properties not retained by pointed enrichments of finite lattices. (English) Zbl 1460.08001
Reviewer: Alexander Ivanovich Budkin (Barnaul)
Neighborhoods and isolated points in spaces of functional clones on sets. (English. Russian original) Zbl 1454.08003
Algebra Logic 59, No. 3, 230-236 (2020); translation from Algebra Logika 59, No. 3, 334-343 (2020).
MSC:
08A40
Structure of quasivariety lattices. III: Finitely partitionable bases. (English. Russian original) Zbl 1484.08016
Algebra Logic 59, No. 3, 222-229 (2020); translation from Algebra Logika 59, No. 3, 323-333 (2020).
The axiomatic rank of the Levi class generated by the almost abelian quasivariety of nilpotent groups. (English) Zbl 1486.20032
Commutative unary algebras with join-semidistributive topology lattices. (English) Zbl 1461.08002
Reviewer: Danica Jakubiková-Studenovská (Košice)
Remarks on NQ-critical commutative unary algebras. (English) Zbl 1457.08002
Reviewer: Danica Jakubiková-Studenovská (Košice)
On a class of subsemigroup lattices. (English. Russian original) Zbl 1459.08009
Sib. Math. J. 61, No. 5, 941-952 (2020); translation from Sib. Mat. Zh. 61, No. 5, 1177-1193 (2020).
Reviewer: Anna Romanowska (Warszawa)
Existence of independent quasi-equational bases. (English. Russian original) Zbl 1452.08006
Algebra Logic 58, No. 6, 514-537 (2020); translation from Algebra Logika 58, No. 6, 769-803 (2019).
Reviewer: Anna Romanowska (Warszawa)
On the complexity of the lattices of subvarieties and congruences. II: Differential groupoids and unary algebras. (English) Zbl 1437.08010
A clonoid based approach to some finiteness results in universal algebraic geometry. (English) Zbl 1461.08003
Reviewer: Alexandr Kazda (Klosterneuburg)
Finite basis problem for involution monoids of unitriangular Boolean matrices. (English) Zbl 1477.20104
The lattice of ai-semiring varieties satisfying \(x^n \approx x\) and \(xy \approx yx\). (English) Zbl 1457.16045
Reviewer: Anna Romanowska (Warszawa)
Automorphic equivalence in the varieties of representations of Lie algebras. (English) Zbl 1460.17011
Reviewer: Plamen Koshlukov (Campinas)
A Levi class generated by a quasivariety of nilpotent groups. (English. Russian original) Zbl 1443.20042
Algebra Logic 58, No. 4, 327-336 (2019); translation from Algebra Logika 58, No. 4, 486-499 (2019).
Reviewer: Alexander Ivanovich Budkin (Barnaul)
\( \omega \)-independent bases for quasivarietes of torsion-free groups. (\( \omega \)-independent bases for quasivarieites of torsion-free groups.) (English. Russian original) Zbl 1444.20019
Algebra Logic 58, No. 3, 214-223 (2019); translation from Algebra Logika 58, No. 3, 320-333 (2019).
Reviewer: Vyacheslav A. Artamonov (Moskva)
Identities in fixed dimension algebras of multioperations. (Russian. English summary) Zbl 1516.08002
MSC:
08A40
Structure of quasivariety lattices. II: Undecidable problems. (English. Russian original) Zbl 1444.08005
Algebra Logic 58, No. 2, 123-136 (2019); translation from Algebra Logika 58, No. 2, 179-199 (2019).
Reviewer: Keith Kearnes (Boulder)
Structure of quasivariety lattices. I: Independent axiomatizability. (English. Russian original) Zbl 1439.08008
Algebra Logic 57, No. 6, 445-462 (2019); translation from Algebra Logika 57, No. 6, 684-710 (2018).
Reviewer: Alexander Ivanovich Budkin (Barnaul)
Algebraic geometry over algebraic structures. IX: Principal universal classes and dis-limits. (English. Russian original) Zbl 1429.08007
Algebra Logic 57, No. 6, 414-428 (2019); translation from Algebra Logika 57, No. 6, 639-661 (2018).
The operator \(L_n\) on quasivarieties of universal algebras. (English. Russian original) Zbl 1475.08002
Sib. Math. J. 60, No. 4, 565-571 (2019); translation from Sib. Mat. Zh. 60, No. 4, 724-733 (2019).
Reviewer: Yuri Movsisyan (Yerevan)
On topologization of direct limits of retractive spectors and their completion. (Russian. English summary) Zbl 1444.08004
On the ascending and descending chain conditions in the lattice of monoid varieties. (English) Zbl 1444.20035
Reviewer: G. I. Zhitomirskij (Herzliyya)
On the Zariski topology of \(\Omega\)-groups. (English) Zbl 1423.16028
Plotkin, Eugene (ed.), Groups, algebras and identities. Research workshop of the Israel Science Foundation ‘Groups, algebras and identities’. In honor of Boris Plotkin’s 90th birthday, Bar-Ilan University and The Hebrew University of Jerusalem, Israel, March 20–24, 2016. Providence, RI: American Mathematical Society (AMS); Ramat Gan: Bar-Ilan University. Contemp. Math. 726, 135-142 (2019).
Galois theory for finite algebras of operations and multioperations of rank 2. (Russian. English summary) Zbl 1528.08005
Cancellable elements of the lattices of varieties of semigroups and epigroups. (English) Zbl 1444.20036
Reviewer: Jaak Henno (Tallinn)
Primitive and almost primitive elements of Schreier varieties. (English. Russian original) Zbl 1485.17017
J. Math. Sci., New York 237, No. 2, 157-179 (2019); translation from Fundam. Prikl. Mat. 21, No. 2, 3-35 (2016).
Reviewer: Mark S. Burgin (Los Angeles)
On representable covers in the lattice of varieties of \(m\)-groups. (Russian. English summary) Zbl 1436.08007
The axiomatic rank of Levi classes. (English. Russian original) Zbl 1406.20035
Algebra Logic 57, No. 5, 381-391 (2018); translation from Algebra Logika 57, No. 5, 587-600 (2018).
The Specht property of \(L\)-varieties of vector spaces over an arbitrary field. (English. Russian original) Zbl 1442.17002
Algebra Logic 57, No. 5, 360-367 (2018); translation from Algebra Logika 57, No. 5, 556-566 (2018).
Reviewer: Plamen Koshlukov (Campinas)
On dominions of the rationals in nilpotent groups. (English. Russian original) Zbl 1418.20010
Sib. Math. J. 59, No. 4, 598-609 (2018); translation from Sib. Mat. Zh. 59, No. 4, 759-772 (2018).
Reviewer: Jonas Deré (Leuven)
A logical and algebraic characterization of adjunctions between generalized quasi-varieties. (English) Zbl 1410.18002
Reviewer: Michel Hébert (Cairo)
Quasiequational bases of Cantor algebras. (English. Russian original) Zbl 1428.08003
Sib. Math. J. 59, No. 3, 375-382 (2018); translation from Sib. Mat. Zh. 59, No. 3, 481-490 (2018).
MSC:
08C15
On the elementary geometry of universal algebras and on the equivalence of clones relative to this geometry. (Russian. English summary) Zbl 1436.08004
MSC:
08A40
A refinement of the equaclosure operator. (English) Zbl 1400.08005
Reviewer: Leonid M. Martynov (Omsk)
Quasiorder lattices of varieties. (English) Zbl 1397.08001
Reviewer: Ivan Chajda (Přerov)
Structure of free strong doppelsemigroups. (English) Zbl 1436.08009
Reviewer: Jaak Henno (Tallinn)
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