| In 1931, Dirac proposed that the existence of a single magnetic monopole in the universe would suffice to explain the quantisation of electrical charge. |
| Dirac's formulation allowed him to obtain the quantisation rules in a novel and more illuminating manner. |
| Under a process known as vector quantisation, tiny blocks of images are placed in the videophone as code and then assembled together by the software. |
| Poisson geometry, deformation quantisation and group representations. |
