PT Journal AU MACUROVA, A MACURA, D TI DIFFERENTIAL EQUATIONS SYSTEMS AND COORDINATE SYSTEMS SO Trends in education PY 2008 BP 574 EP 577 VL 1 IS 1 DE Differential equations systems; coordinates systems; transformation systems. AB The article introduces some coordinate systems important for transformation nonlinear differential equations system and investigated the properties of the solutions. The nonlinear differential equations systems are investigated as quasilinear differential equations systems. ER