Popa Mihail

Publications in Math-Net.Ru

1. Invariant conditions of stability of unperturbed motion governed by critical differential systems $s(1,2,3)$
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2019, no. 2,  137–153
2. On the upper bound of the number of functionally independent focal quantities of the Lyapunov differential system
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2019, no. 2,  99–112
3. Invariant conditions of stability of unperturbed motion governed by some differential systems in the plane
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2017, no. 3,  88–106
4. Applications of algebraic methods in solving the center-focus problem
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2013, no. 1,  45–71
5. Generators of the algebras of invariants for differential system with homogeneous nonlinearities of odd degree
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2012, no. 2,  43–58
6. About characteristics of graded algebras $S_{1,4}$ and $SI_{1,4}$
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2010, no. 1,  23–32
7. Classification of $GL(2,\mathbb R)$-orbi's dimensions for the differential equations' system with homogeneities of the 4th order
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2007, no. 1,  25–36
8. Lie algebras of operators and invariant $GL(2,\mathbb{R})$-integrals for Darboux type differential systems
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2006, no. 3,  3–16
9. Lie algebras of the operators and three-dimensional polynomial differential systems
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2005, no. 2,  51–64
10. A Lie algebra of a differential generalized FitzHugh–Nagumo system
    
    Bul. Acad. Ştiinţe Repub. Mold. Mat., 2003, no. 1,  18–30
11. Application of invariant processes to the study of homogeneous linear particular integrals of a differential system
    
    Dokl. Akad. Nauk SSSR, 317:4 (1991),  834–839
12. Conditions for the existence of a homogeneous linear partial integral of a differential system
    
    Differ. Uravn., 23:8 (1987),  1324–1331
13. Focal cyclicity of critical points of a differential system
    
    Differ. Uravn., 22:9 (1986),  1539–1545
14. Affine classification of a system with quadratic nonlinearities and not single valued canonical form
    
    Differ. Uravn., 14:6 (1978),  1028–1033
15. Concomitants of a system with quadratic nonlinearities
    
    Differ. Uravn., 14:5 (1978),  835–842
16. Syzygies between the affine invariants of a system with quadratic right hand sides
    
    Differ. Uravn., 13:12 (1977),  2272–2275