Şubă Alexandru

Publications in Math-Net.Ru

1. The problem of the center for cubic differential systems with the line at infinity and an affine real invariant straight line of total algebraic multiplicity five
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2019, no. 2,  13–40
2. Quartic differential systems with an invariant straight line of maximal multiplicity
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2018, no. 1,  76–91
3. Cubic systems with degenerate infinity and invariant straight lines of total parallel multiplicity five
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2016, no. 3,  38–56
4. Cubic systems with seven invariant straight lines of configuration $(3,3,1)$
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2012, no. 2,  81–98
5. The cubic differential system with six real invariant straight lines along three directions
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2009, no. 2,  111–130
6. The $GL(2,\mathbb R)$-orbits of the homogeneous polynomial differential systems
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2008, no. 3,  44–56
7. $GL(2,R)$-orbits of the polynomial sistems of differential equations
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2004, no. 3,  25–40
8. Solution of the center problem for cubic systems with a bundle of three invariant straight lines
   
   Bul. Acad. Ştiinţe Repub. Mold. Mat., 2003, no. 1,  91–101
9. Partial integrals, integrability and the center problem
   
   Differ. Uravn., 32:7 (1996),  880–888
10. On the structure of an integrating factor for a cubic system with a singular point of center type
    
    Differ. Uravn., 32:5 (1996),  713–715
11. On the Kukles and Cherkas center conditions for a cubic system
    
    Differ. Uravn., 29:4 (1993),  728–730
12. Sufficient conditions for the center for a two-dimensional autonomous system with cubic right-hand sides
    
    Differ. Uravn., 25:11 (1989),  2014–2016
13. Coefficient conditions for a center in the sense of Dulac for a differential system with one zero characteristic root and cubic right-hand sides
    
    Dokl. Akad. Nauk SSSR, 303:4 (1988),  799–803
14. Semi-dynamical systems on the line
    
    Differ. Uravn., 13:12 (1977),  2207–2212