This is the difficulty with relativistic invariance ( invariance with respect to Lorentz transformations ) and Heisenberg could not overcome it; a remarkable way of overcoming it has been found by Hambardzumyan and the young Cambridge mathematician Ursell . " Almost 80 years have passed since that time, but the problem of space quantization has still not been completely solved, although from time to time some researchers return to the topic, which confirms the ongoing timeliness of the problem.