Vol 14 No 2 (2022): Acta et Commentationes Exact and Natural Sciences
Acta et Commentationes Exact and Natural Sciences
Acta et Commentationes Exact and Natural Sciences

The Acta et Commentationes scientific journal, the Exact and Natural Sciences series is a periodical publication, whose purpose is to reflect and develop the modern scientific phenomenon in the field of Exact and Natural Sciences (Mathematics,  Chemistry and Biology); dissemination of the results of the scientific performance researches (fundamental and applicative) in the fields of profile; publicizing new technologies in order to implement them; addressing and elucidating the scientific investigative problems specific to the journal profiles.

The journal is included in the Register of Scientific Journals of the Republic of Moldova in category B and can be accessed at https://ibn.idsi.md/ro/vizualizare_revista/418. The e-mail address of the magazine is aec@ust.md

Full Issue
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Ihor Cherevko, Andrii Dorosh, Ivan Haiuk, Andrii Pertsov
7-14
Approximation of solutions of boundary value problems for integro-differential equations of the neutral type using a spline function method
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Mihail Popa
15-23
Problems of the theory of invariants and Lie algebras applied in the qualitative theory of differential systems
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Vasile Neagu, Diana Bîclea
24-37
Extension of linear operators with applications
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Alexandru Șubă
38-46
Centers of cubic differential systems with the line at infinity of maximal multiplicity
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Victor Shcherbacov
47-52
Schroder T-quasigroups of generalized associativity
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Omer Gok
53-56
On regular operators on Banach Lattices
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Natalia Neagu, Mihail Popa, Victor Orlov
57-67
Stability of unperturbed motion governed by the ternary differential system of Lyapunov-Darboux type with nonlinearities of degree four
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Vadim Repeșco
68-80
Phase portraits of some polynomial differential systems with maximal multiplicity of the line at the infinity
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Alina Turcanu
81-87
The left product, the right product and the theories of relative torsion
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Dumitru Cozma
88-100
Center conditions for a cubic system with two homogeneous invariant straight lines and exponential factors
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Sergiu Corlat, Veaceslav Guzun, Victor Vorona
101-105
Finding N bits using O(N/Log(N)) sums
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Iurie Baltag
106-116
On determination of some exact solutions of the stationary Navier-Stokes equations
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Liubomir Chiriac, Aurel Danilov, Violeta Bogdanova
117-131
Encryption and decryption algorithm based on the Latin groupoid isotopes
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Nicolai Aluchi
132-134
Book Review: Study Of Useful Properties Of Some Coordination Compounds Containing Oximic Ligands, by E. Coropceanu, A. Ciloci, A. Ștefîrță, I. Bulhac, ˘ ISBN 978-3-9402237-24-8, 266 p.
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