Collisions of vertical Bloch lines clusters

The methods of double and triple high-speed photography are used for registration of the vertical Bloch line (VBL) collisions in bismuth-substituted iron garnet films in the real-time scale. The experiments show that after collision of two VBLs it is possible to observe the annihilation, complete or partial restoration, and increase of topological charge of the VBL. This makes the situation under discussion more general than in the classical theory of solitons, in the experiments on a collision of Josephson vortexes, and makes it possible to carry out a large number of logical operations with the colliding VBLs