Linear Algebra, Mathematics, Machine Learning, Norms.
simple example of this would be to take a random set of vectors, say (0,0), (0,6) and (0.0001,4). The L⁰ norm of the first would return 0 sinse it consits of all non-zero elements, the second would return 1 since it consits of one non-zero element, and the final would return 2 since it consits of