Lista publicaţiilor: Popa Mihail Nicolai - 33

2023 - 4

On stability of some examples of ternary differential critical systems with quadratic nonlinearities

Neagu Natalia , Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Vladimir Andrunachievici Institute of Mathematics and Computer Science, MSU

Acta et commentationes (Ştiinţe Exacte și ale Naturii)

Nr. 2(16) / 2023 / ISSN 2537-6284 / ISSNe 2587-3644

Disponibil online 25 January, 2024

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Professor Alexandru Subă on his 70th birthday

Cozma Dumitru, Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Vladimir Andrunachievici Institute of Mathematics and Computer Science, MSU

Acta et commentationes (Ştiinţe Exacte și ale Naturii)

Nr. 2(16) / 2023 / ISSN 2537-6284 / ISSNe 2587-3644

Disponibil online 25 January, 2024

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Differential Equations and Algebras

Popa Mihail Nicolai

1 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 2 "Ion Creangă" State Pedagogical University from Chisinau

Conference on Applied and Industrial Mathematics

Ediţia 30. 2023. Iași, România. 7-11.

Disponibil online 21 March, 2024

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Differential equations and algebras

Popa Mihail Nicolai

1 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 2 "Ion Creangă" State Pedagogical University from Chisinau

Science and education: new approaches and perspectives

Seria 25. 2023. Chişinău. (CEP UPSC. 58-59.

Disponibil online 7 November, 2023

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2022 - 3

Stability of unperturbed motion governed by the ternary differential system of Lyapunov-Darboux type with nonlinearities of degree four

Neagu Natalia , Popa Mihail Nicolai, Orlov Victor Mihai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 3 Technical University of Moldova

Acta et commentationes (Ştiinţe Exacte și ale Naturii)

Nr. 2(14) / 2022 / ISSN 2537-6284 / ISSNe 2587-3644

Disponibil online 24 February, 2023

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Problems of the theory of invariants and Lie algebras applied in the qualitative theory of differential systems

Popa Mihail Nicolai

Vladimir Andrunachievici Institute of Mathematics and Computer Science

Acta et commentationes (Ştiinţe Exacte și ale Naturii)

Nr. 2(14) / 2022 / ISSN 2537-6284 / ISSNe 2587-3644

Disponibil online 24 February, 2023

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Stability problems of the unperturbed motion governed by the ternary differential system of Lyapunov-Darboux type with nonlinearities of degree four

Neagu Natalia , Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Tiraspol State University, 3 Vladimir Andrunachievici Institute of Mathematics and Computer Science

Conference on Applied and Industrial Mathematics

Ediţia a 29. 2022. Chișinău, Republica Moldova. Casa Editorial-Poligrafică „Bons Offices”. 63-67.

Disponibil online 19 December, 2022

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2021 - 4

Lyapunov’s stability of the unperturbed motion governed by the s3(1,3) differential system of Darboux type

Neagu Natalia , Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Tiraspol State University, 3 Vladimir Andrunachievici Institute of Mathematics and Computer Science

Acta et commentationes (Ştiinţe Exacte și ale Naturii)

Nr. 2(12) / 2021 / ISSN 2537-6284 / ISSNe 2587-3644

Disponibil online 10 February, 2022

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Four-dimensional reductive Lie algebra for the ternary differential system with quadratic nonlinearities and its perspectives in the study of this system

Popa Mihail Nicolai, Pricop Victor Vasile

1 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 2 "Ion Creangă" State Pedagogical University from Chisinau

Actual Problems of Mathematics and Informatics

2021. Chişinău. Tehnica- UTM. 72-73.

Disponibil online 25 June, 2021

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Stability conditions of unperturbed motion governed by critical three-dimensional differential system of Darboux type with cubic nonlinearities

Neagu Natalia , Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Tiraspol State University, 3 Vladimir Andrunachievici Institute of Mathematics and Computer Science

Mathematics and IT: Research and Education

2021. Chișinău, Republica Moldova. 62-63.

Disponibil online 30 June, 2021

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Stability conditions of unperturbed motion governed by critical three-dimensional di_erential system of Darboux type s3(1; 2; 3)

Neagu Natalia , Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Tiraspol State University, 3 Vladimir Andrunachievici Institute of Mathematics and Computer Science

Conference on Applied and Industrial Mathematics

Ediţia a 28-a. 2021. Chișinău, Republica Moldova. Casa Editorial-Poligrafică „Bons Offices”. 21-22.

Disponibil online 20 September, 2022

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2020 - 2

Comitants of Lie algebra of rotation groups for ternary system with quadratic nonlinearities

Popa Mihail Nicolai, Pricop Victor Vasile

1 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 2 "Ion Creangă" State Pedagogical University from Chisinau

Învăţământ superior: tradiţii, valori, perspective

Vol. 1. 2020. Chișinău, Republica Moldova. Universitatea de Stat din Tiraspol. 57-60.

Disponibil online 20 November, 2020

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About an algebraic vision on the center and focus problem

Popa Mihail Nicolai, Pricop Victor Vasile

1 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 2 "Ion Creangă" State Pedagogical University from Chisinau

Сучаснi проблеми диференцiальних рiвнянь та їх застосування

2020. Чернiвцi. Чернівецький національний університет імені Юрія Федьковича. 62-63.

Disponibil online 24 November, 2023

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2019 - 4

On a case of stability of unperturbated motion governed by the ternary differential critical system with quadratic nonlinearities

Neagu Natalia , Popa Mihail Nicolai

1 "Ion Creangă" State Pedagogical University from Chisinau, 2 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 3 Tiraspol State University

Acta et commentationes (Ştiinţe Exacte și ale Naturii)

Nr. 2(8) / 2019 / ISSN 2537-6284 / ISSNe 2587-3644

Disponibil online 29 January, 2020

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Invariant conditions of stability of unperturbed motion governed by critical differential systems s(1, 2, 3)

Neagu Natalia , Orlov Victor Mihai, Popa Mihail Nicolai

1 Tiraspol State University, 2 Vladimir Andrunachievici Institute of Mathematics and Computer Science

Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica

Nr. 2(90) / 2019 / ISSN 1024-7696 / ISSNe 2587-4322

Disponibil online 4 January, 2020

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On the upper bound of the number of functionally independent focal quantities of the Lyapunov differential system

Popa Mihail Nicolai, Pricop Victor Vasile

Vladimir Andrunachievici Institute of Mathematics and Computer Science

Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica

Nr. 2(90) / 2019 / ISSN 1024-7696 / ISSNe 2587-4322

Disponibil online 3 January, 2020

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Center-affine invariant stability conditions of unperturbed motion governed by critical cubic differential system

Neagu Natalia , Orlov Victor Mihai, Popa Mihail Nicolai

1 Tiraspol State University, 2 "Ion Creangă" State Pedagogical University from Chisinau, 3 Technical University of Moldova, 4 Vladimir Andrunachievici Institute of Mathematics and Computer Science

Proceedings IMCS-55

2019. Chișinău, Republica Moldova. "VALINEX" SRL. 119-124.

Disponibil online 1 November, 2019

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2018 - 1

Invariant conditions of stability of unperturbed motion described by cubic differential system with quadratic part of Darboux type

Neagu Natalia , Orlov Victor Mihai, Popa Mihail Nicolai

1 Tiraspol State University, 2 "Ion Creangă" State Pedagogical University from Chisinau, 3 Vladimir Andrunachievici Institute of Mathematics and Computer Science, 4 Technical University of Moldova

Conference on Applied and Industrial Mathematics

Ediţia a 26-a. 2018. Chișinău, Republica Moldova. Casa Editorial-Poligrafică „Bons Offices”. 37-39.

Disponibil online 31 May, 2022

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2017 - 3

On periodic solutions of the four-dimensional differential system of Lyapunov-Darboux type with quadratic nonlinearities

Orlov Victor Mihai, Popa Mihail Nicolai

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. Centrul Editorial-Poligrafic al USM. 311-316.

Disponibil online 5 October, 2017

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Invariant conditions of stability of unperturbed motion for differential systems with quadratic nonlinearities in the critical case

Neagu Natalia , Orlov Victor Mihai, Popa Mihail Nicolai

1 Tiraspol State University, 2 "Ion Creangă" State Pedagogical University from 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. Centrul Editorial-Poligrafic al USM. 301-304.

Disponibil online 5 October, 2017

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