Helmholtz theorem on conservation of vortex strength
теорема Гельмгольця, про збереження напруженості вихрової нитки
Helmholtz theorem on conservation of vortex lines
Thomson theorem on conservation of vortex lines
Zorawski theorem on conservation of vortex lines
Helmholtz theorem on vorticity diffusion in a viscous liquid
principle of conservation of mass
principle of conservation of momentum
Bernoulli theorem for a viscous incompressible fluid