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Found 213 Documents (Results 1–100)

On one class of Bol three-webs. (English. Russian original) Zbl 07798720

J. Math. Sci., New York 276, No. 3, 387-390 (2023); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 179, 37-40 (2020).
MSC:  53A60
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Planar spaces with projective connections. (English. Russian original) Zbl 07798168

J. Math. Sci., New York 276, No. 4, 580-586 (2023); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 180, 113-119 (2020).
MSC:  53B10 53A20
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On the structure of some complexes of \(m\)-dimensional planes of the projective space \(P^n\) containing a finite number of torses. (English. Russian original) Zbl 07798153

J. Math. Sci., New York 276, No. 4, 477-483 (2023); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 180, 9-16 (2020).
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Reduction of fibrations of a Grassmann-like manifold of centered planes under normalization. (English. Russian original) Zbl 07798152

J. Math. Sci., New York 276, No. 4, 471-476 (2023); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 180, 3-8 (2020).
MSC:  53A20
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(Anti-)self-dual Einsteinian metrics of zero signature, their Petrov classes and connection with Kähler and para-Kähler structures. (English. Russian original) Zbl 1515.53020

Russ. Math. 66, No. 9, 33-45 (2022); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2022, No. 9, 39-53 (2022).
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Null hypersurfaces and the rigged metric. (English) Zbl 1508.53071

Albujer, Alma L. (ed.) et al., Developments in Lorentzian geometry. Selected papers based on the presentations at the 10th international meeting on Lorentzian geometry, GeLoCor 2021, Cordoba, Spain, February 1–5, 2021. Cham: Springer. Springer Proc. Math. Stat. 389, 129-142 (2022).
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An integral formula for a Riemannian manifold with \(k > 2\) singular distributions. (English) Zbl 1485.53029

Mladenov, Ivaïlo M. (ed.) et al., Proceedings of the 22nd international conference on geometry, integrability and quantization, Varna, Bulgaria, June 8–13, 2020. Sofia: Bulgarian Academy of Sciences, Institute of Biophysics and Biomedical Engineering. Geom. Integrability Quantization 22, 253-262 (2021).
MSC:  53C12 53C20 57R25
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Specificity of Petrov classification of (anti-)self-dual zero signature metrics. (English. Russian original) Zbl 1477.53030

Russ. Math. 64, No. 9, 50-60 (2020); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2020, No. 9, 56-67 (2020).
MSC:  53B30 58A14 53C18
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Minimal projectivity condition for a smooth mapping and the Gronwall problem. (English. Russian original) Zbl 1456.53013

J. Math. Sci., New York 248, No. 4, 484-496 (2020); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 148, 109-121 (2018).
MSC:  53A60
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H. Weyl’s deep insights into the mathematical and physical worlds: his important contribution to the philosophy of space, time and matter. (English) Zbl 1442.83004

Bernard, Julien (ed.) et al., Weyl and the problem of space. From science to philosophy. Cham: Springer. Stud. Hist. Philos. Sci. (Dordr.) 49, 231-263 (2019).
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Duality equations on a 4-manifold of conformal torsion-free connection and some of their solutions for the zero signature. (Russian. English summary) Zbl 1449.53031

MSC:  53C18 53Z05 53B05
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The main theorem for (anti-)self-dual conformal torsion-free connection on a four-dimensional manifold. (English. Russian original) Zbl 1429.37020

Russ. Math. 63, No. 2, 25-34 (2019); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2019, No. 2, 29-38 (2019).
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Structure of the main tensor of conformally connected torsion free space. Conformal connections on hypersurfaces of projective space. (Russian, English) Zbl 1438.53068

Sib. Zh. Chist. Prikl. Mat. 17, No. 2, 21-38 (2017); translation in J. Math. Sci., New York 231, No. 2, 189-205 (2018).
MSC:  53C18 53B15
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Complete classification of isotopically invariant varieties of analytic loops defined by regular identities of length four. (English. Russian original) Zbl 1391.53014

Russ. Math. 61, No. 3, 58-66 (2017); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2017, No. 3, 68-77 (2017).
MSC:  53A60 14C21
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Liouville-type theorems for theories of Riemannian almost product structures and submersions. (Russian, English) Zbl 1413.53106

Sib. Zh. Chist. Prikl. Mat. 16, No. 4, 3-12 (2016); translation in J. Math. Sci., New York 230, No. 1, 1-9 (2018).
MSC:  53C43 53C55
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Left Bol three-webs with the \(IC\)-property. (English. Russian original) Zbl 1272.53007

Russ. Math. 57, No. 5, 20-28 (2013); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2013, No. 5, 25-35 (2013).
MSC:  53A60
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Eight-dimensional Bol webs with almost zero curvature tensor. (English. Russian original) Zbl 1266.53015

Russ. Math. 57, No. 2, 1-12 (2013); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2013, No. 2, 3-15 (2013).
MSC:  53A60
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Conformal isoparametric spacelike hypersurfaces in conformal spaces \(\mathbb Q_1^4\) and \(\mathbb Q^5_1\). (English. Russian original) Zbl 1291.53076

Ukr. Math. J. 64, No. 4, 634-652 (2012); translation from Ukr. Mat. Zh. 64, No. 4, 557-570 (2012).
MSC:  53C42 53B25 53A30 53B30
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