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Volume 57

2020 Next

Publication date: 2020

Licence: CC BY-NC-ND  licence icon

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Editor-in-Chief Sławomir Kołodziej

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Punam Gupta, Abdoul Salam Diallo

Universitatis Iagellonicae Acta Mathematica, Volume 57, 2020, pp. 7-24

https://doi.org/10.4467/20843828AM.20.001.13311

In this paper, we study the doubly warped product manifolds with semi-symmetric metric connection. We derive the curvature formulas for doubly warped product manifold with semi-symmetric metric connection in terms of curvatures of components of doubly warped product manifolds. We also prove the necessary and sufficient condition for a doubly warped product manifold to be a warped product manifold. We obtain some results for an Einstein doubly warped product manifold and Einstein-like doubly warped product manifold of class A with respect to a semi-symmetric metric connection.

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Marcin Sroka

Universitatis Iagellonicae Acta Mathematica, Volume 57, 2020, pp. 25-58

https://doi.org/10.4467/20843828AM.20.002.13312

We provide the classification of the six-dimensional decomposable Lie algebras, with the dimension of the biggest indecomposable summand less than five, admitting complex structures. 

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