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Popa Mihail
Cuvinte-cheie (62): differential system (7), Differential systems (5), stability of unperturbed motion (4)
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Articole în reviste din RM - 11. Publicaţii la conferinţe din RM - 11.
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2021 - 2

Four-dimensional reductive Lie algebra for the ternary differential system with quadratic nonlinearities and its perspectives in the study of this system
Popa Mihail1, Pricop Victor2
1 Vladimir Andrunakievich Institute of Mathematics and Computer Science,
2 Ion Creanga Pedagogical State University of Chisinau
Actual Problems of Mathematics and Informatics
2021. Chişinău. ISBN 978-9975-45-677-7.
Disponibil online 25 June, 2021. Descarcări-1. Vizualizări-46
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Stability conditions of unperturbed motion governed by critical three-dimensional differential system of Darboux type with cubic nonlinearities
Neagu Natalia1, Popa Mihail23
1 Ion Creanga Pedagogical State University of Chisinau,
2 Moldova Tiraspol State University,
3 Vladimir Andrunakievich Institute of Mathematics and Computer Science
Mathematics and IT: Research and Education
2021. Chișinău, Republica Moldova. .
Disponibil online 30 June, 2021. Descarcări-0. Vizualizări-38
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2020 - 1

Comitants of Lie algebra of rotation groups for ternary system with quadratic nonlinearities
Popa Mihail1, Pricop Victor2
1 Vladimir Andrunakievich Institute of Mathematics and Computer Science,
2 Ion Creanga Pedagogical State University of Chisinau
Învăţământ superior: tradiţii, valori, perspective Științe Exacte și ale Naturii și Didactica Științelor Exacte și ale Naturii
Vol. 1. 2020. Chișinău, Republica Moldova. ISBN 978-9975-76-312-7.
Disponibil online 20 November, 2020. Descarcări-1. Vizualizări-154
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2019 - 4

Center-affine invariant stability conditions of unperturbed motion governed by critical cubic differential system
Neagu Natalia12, Orlov Victor34, Popa Mihail41
1 Moldova Tiraspol State University,
2 Ion Creanga Pedagogical State University of Chisinau,
3 Technical University of Moldova,
4 Vladimir Andrunakievich Institute of Mathematics and Computer Science
Proceedings IMCS-55The Fifth Conference of Mathematical Society of the Republic of Moldova
2019. Chișinău, Republica Moldova. ISBN 978-9975-68-378-4.
Disponibil online 1 November, 2019. Descarcări-2. Vizualizări-289
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Invariant conditions of stability of unperturbed motion governed by critical differential systems s(1, 2, 3)
Neagu Natalia1, Orlov Victor12, Popa Mihail2
1 Moldova Tiraspol State University,
2 Vladimir Andrunakievich Institute of Mathematics and Computer Science
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 2(90) / 2019 / ISSN 1024-7696
Disponibil online 4 January, 2020. Descarcări-1. Vizualizări-408
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On a case of stability of unperturbated motion governed by the ternary differential critical system with quadratic nonlinearities
Neagu Natalia1, Popa Mihail23
1 Ion Creanga Pedagogical State University of Chisinau,
2 Vladimir Andrunakievich Institute of Mathematics and Computer Science,
3 Moldova Tiraspol State University
Acta et commentationes (Ştiinţe Exacte și ale Naturii)
Nr. 2(8) / 2019 / ISSN 2537-6284
Disponibil online 29 January, 2020. Descarcări-0. Vizualizări-271
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On the upper bound of the number of functionally independent focal quantities of the Lyapunov differential system
Popa Mihail, Pricop Victor
Vladimir Andrunakievich Institute of Mathematics and Computer Science
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 2(90) / 2019 / ISSN 1024-7696
Disponibil online 3 January, 2020. Descarcări-1. Vizualizări-272
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2017 - 3

Invariant conditions of stability of unperturbed motion for differential systems with quadratic nonlinearities in the critical case
Neagu Natalia12, Orlov Victor3, Popa Mihail4
1 Moldova Tiraspol State University,
2 Ion Creanga Pedagogical State University of Chisinau,
3 Technical University of Moldova,
4 Institute of Mathematics and Computer Science ASM
Conference of Mathematical Society of the Republic of Moldova
4. 2017. Chişinău. ISBN 978-9975-71-915-5.
Disponibil online 5 October, 2017. Descarcări-1. Vizualizări-447
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Invariant conditions of stability of unperturbed motion governed by some differential systems in the plane
Neagu Natalia1, Orlov Victor23, Popa Mihail3
1 Ion Creanga Pedagogical State University of Chisinau,
2 Technical University of Moldova,
3 Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 3(85) / 2017 / ISSN 1024-7696
Disponibil online 10 February, 2018. Descarcări-4. Vizualizări-442
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On periodic solutions of the four-dimensional differential system of Lyapunov-Darboux type with quadratic nonlinearities
Orlov Victor12, Popa Mihail2
1 Technical University of Moldova,
2 Institute of Mathematics and Computer Science ASM
Conference of Mathematical Society of the Republic of Moldova
4. 2017. Chişinău. ISBN 978-9975-71-915-5.
Disponibil online 5 October, 2017. Descarcări-1. Vizualizări-382
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2016 - 1

Prolonged holding and cyclic loading indentation of aluminophosphate glass: kinetics of deformation
Răzlog (Belei) Ina1, Shikimaka Olga A.1, Grabco Daria1, Sava Bogdan Alexandru2, Boroica Lucica2, Elişa Mihail3, Pyrtsac Constantin1, Prisacaru Andrian1, Popa Mihail1
1 Institute of Applied Physics, Academy of Sciences of Moldova,
2 National Institute for Laser, Plasma and Radiation Physics (INFLPR),
3 National Institute for Optoelectronics INOE2000, Magurele
Materials Science and Condensed Matter Physics
Editia 8. 2016. Chişinău. ISBN 978-9975-9787-1-2.
Disponibil online 30 July, 2019. Descarcări-1. Vizualizări-352
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2015 - 1

Algebraic methods to the center-focus problem
Popa Mihail1, Pricop Victor2
1 Institute of Mathematics and Computer Science ASM,
2 Ion Creanga Pedagogical State University of Chisinau
Învățămîntul superior din Republica Moldova la 85 de ani Probleme actuale ale ștințelor exacte și ale naturii
Vol. 1. 2015. Chișinău, Republica Moldova. ISBN 978-9975-76-159-8.
Disponibil online 24 July, 2019. Descarcări-0. Vizualizări-228
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2014 - 2

First integrals with polynomials not higher than second order of the mathematical model of the intrinsic transmission dynamics of tuberculosis
Neagu Natalia1, Popa Mihail2, Orlov Victor23
1 Ion Creanga Pedagogical State University of Chisinau,
2 Institute of Mathematics and Computer Science ASM,
3 Technical University of Moldova
Conference of Mathematical Society of the Republic of Moldova
3. 2014. Chișinău. ISBN 978-9975-68-244-2.
Disponibil online 9 October, 2017. Descarcări-2. Vizualizări-804
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The upper and lower bounds for number of conditions for center of the differential system s(1; 2; :::; q)
Popa Mihail1, Pricop Victor12
1 Institute of Mathematics and Computer Science ASM,
2 Ion Creanga Pedagogical State University of Chisinau
Conference of Mathematical Society of the Republic of Moldova
3. 2014. Chișinău. ISBN 978-9975-68-244-2.
Disponibil online 9 October, 2017. Descarcări-0. Vizualizări-463
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2013 - 1

Applications of algebraic methods in solving the center-focus problem
Popa Mihail, Pricop Victor
Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 1(71) / 2013 / ISSN 1024-7696
Disponibil online 15 December, 2013. Descarcări-2. Vizualizări-593
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2012 - 1

Generators of the algebras of invariants for differential system with homogeneous nonlinearities of odd degree
Gherştega Natalia, Popa Mihail, Pricop Victor
Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 2(69) / 2012 / ISSN 1024-7696
Disponibil online 15 December, 2013. Descarcări-0. Vizualizări-684
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2010 - 1

About characteristics of graded algebras S1,4 and SI1,4
Gherştega Natalia, Popa Mihail, Pricop Victor
Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 1(62) / 2010 / ISSN 1024-7696
Disponibil online 15 December, 2013. Descarcări-0. Vizualizări-663
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2007 - 1

Classification of GL(2,R)-orbit’s dimensions for the differential equations’ system with homogeneities of the 4th order
Naidenova Elena, Popa Mihail, Orlov Victor
Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 1(53) / 2007 / ISSN 1024-7696
Disponibil online 16 December, 2013. Descarcări-0. Vizualizări-685
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2006 - 1

Lie algebras of operators and invariant GL(2,R)-integrals for Darboux type differential systems
Diaconescu Oxana, Popa Mihail
Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 3(52) / 2006 / ISSN 1024-7696
Disponibil online 18 December, 2015. Descarcări-1. Vizualizări-490
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2005 - 2

Lie algebras of the operators and three-dimensional polynomial differential systems
Gherştega Natalia1, Popa Mihail2
1 Moldova Tiraspol State University,
2 Institute of Mathematics and Computer Science ASM
Buletinul Academiei de Ştiinţe a Moldovei. Matematica
Nr. 2(48) / 2005 / ISSN 1024-7696
Disponibil online 7 December, 2013. Descarcări-5. Vizualizări-646
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