Vol 2 No 16 (2023): 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 journal is aec@ust.md

Full Issue
Full Issue
Dumitru Cozma, Mihail Popa
7-12
Professor Alexandru Șubă on his 70th birthday
pdf
Yaroslav Bihun, Ihor Skutar
13-24
Averaging in multifrequency systems with multi-point conditions and a delay
pdf
Alexandru Șubă, Olga Vacaraș
25-34
Quartic differential systems with a non-degenerate monodromic critical point and multiple line at infinity
pdf
Vasile Neagu, Diana Bîclea
35-50
Perturbation of singular integral operators with piecewise continuous coefficients
pdf
Alexadra Tkacenko
51-65
The method for solving the multi-criteria linear-fractional optimization problem in integers
pdf
Natalia Neagu, Mihail Popa
66-77
On stability of some examples of ternary differential critical systems with quadratic nonlinearities
pdf
Dumitru Moraru
78-88
Tuning method of automatic controllers to object models with second order advance-delay and dead time
pdf
Laurențiu Calmuțchi
89-96
Generalized Hausdorff compactifications
pdf
Dumitru Cozma
97-105
First integrals in a cubic differential system with one invariant straight line and one invariant cubic
pdf
Victor Shcherbacov, Irina Radilova, Petr Radilov
106-110
T-quasigroups with Stein 2-nd and 3-rd identity
pdf
Vadim Repeșco
111-117
Qualitative analysis of polynomial differential systems with the line at infinity of maximal multiplicity: exploring linear, quadratic, cubic, quartic, and quintic cases
pdf
Inga Titchiev, Olesea Caftanatov, Dan Talambuta
118-127
Discovering the mysteries of Pi number using AR technologies
pdf
Liubomir Chiriac, Natalia Lupashco, Maria Pavel
128-142
Application of genetic algorithm to solving the optimization problem of locations graph vertices in the line
pdf