Acta et Commentationes Exact and Natural Sciences

Current Issue

Vol 8 No 2 (2019)
Published January 28, 2020

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, Physics, Computer Science, Chemistry, Biology, Geography); 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.

Elena CEBOTARU
7-15
ABOUT THE VALUES OF THE PARAMETERS THAT DESCRIBE THE NEWTONIAN PROBLEM OF THE EIGHT BODIES
https://doi.org/10.36120/2587-3644.v8i2.7-15
pdf (Русский)
Mitrofan CHOBAN, Ekaterina MIHAYLOVA
16-21
ON METRIZABLE FAMILIES OF SUBSPACES OF LOCALLY CONVEX SPACES VIA SELECTIONS
https://doi.org/10.36120/2587-3644.v8i2.16-21
pdf (Русский)
Dumitru COZMA, Angela MATEI
22-28
CENTER CONDITIONS FOR A CUBIC DIFFERENTIAL SYSTEM WITH ONE INVARIANT STRAIGHT LINE
https://doi.org/10.36120/2587-3644.v8i2.22-28
pdf (Русский)
I. M. DANYLIUK, A. O. DANYLIUK
29-42
THE CAUCHY PROBLEM FOR A PARABOLIC SYSTEM OF INTEGRO-DIFFERENTIAL EQUATIONS WITH AN OPERATOR OF VOLTERRA-FREDHOLM TYPE
https://doi.org/10.36120/2587-3644.v8i2.29-42
pdf (Русский)
Sergiu MIRON
43-50
THE PROBLEM OF THE NUMBER π AND ANOTHER CONSTRUCTION OF TRIGONOMETRY
https://doi.org/10.36120/2587-3644.v8i2.43-50
pdf (Русский)
Natalia NEAGU, Mihail POPA
51-57
ON A CASE OF STABILITY OF UNPERTURBATED MOTION GOVERNED BY THE TERNARY DIFFERENTIAL CRITICAL SYSTEM WITH QUADRATIC NONLINEARITIES
https://doi.org/10.36120/2587-3644.v8i2.51-57
pdf (Русский)
Vasile NEAGU
58-69
ON THE REGULARIZATION OF SOME SINGULAR INTEGRAL OPERATORS. NOETHERIAN CRITERIA
https://doi.org/10.36120/2587-3644.v8i2.58-69
pdf (Русский)
Vadim REPEȘCO
70-75
CUBIC SYSTEMS WITH SEVEN INVARIANT STRAIGHT LINES ALONG ONE DIRECTION, WHEN SOME STRAIGHT LINES ARE COMPLEX CONJUGATE
https://doi.org/10.36120/2587-3644.v8i2.70-75
pdf (Русский)
Alexandru ŞUBĂ, Alexandru PÎSLARU
76-83
SOLUTION OF THE CENTER-FOCUS PROBLEM FOR A CUBIC DIFFERENTIAL SYSTEM WITH A REAL INVARIANT STRAIGHT LINE AND THE LINE AT INFINITY OF MULTIPLICITY TWO
https://doi.org/10.36120/2587-3644.v8i2.76-83
pdf (Русский)
Serban E. VLAD
84-91
A LYAPUNOV TYPE INVARIANCE THEOREM FOR THE BOOLEAN ASYNCHRONOUS DYNAMICAL SYSTEMS
https://doi.org/10.36120/2587-3644.v8i2.84-91
pdf (Русский)
Binbin ZHANG, V. A. PRONKO, S. L. SOBOLEVSKY
92-102
RATIONAL SOLUTIONS OF CERTAIN CLASSES OF NON-LINEAR DIFFERENTIAL EQUATIONS
https://doi.org/10.36120/2587-3644.v8i2.92-102
pdf (Русский)
Inga ȚIȚCHIEV
103-110
APPLICATION OF PETRI NETS IN LOGICAL PROBLEMS SOLVING
https://doi.org/10.36120/2587-3644.v8i2.103-110
pdf (Русский)
Eduard HEYFETZ
111-123
ESSENTIALS OF SPECULATIVE PHYSICS
https://doi.org/10.36120/2587-3644.v8i2.111-123
pdf (Русский)
Mariana OSIAC, Igor POSTOLACHI
124-135
LASER ABLATION APPLIED FOR SYNTHESIS OF THIN FILMS GaSb‹Fe› AND GaSb‹Mn›
https://doi.org/10.36120/2587-3644.v8i2.124-135
pdf (Русский)
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