Machine Learning, Artificial Intelligence, Deep Learning, Neural Networks.
sparse one with L1 norm? L1 norm is defined as the summation of absolute values of a vector’s all components. For example, if a vector is [x, y], its L1 norm is |x| + |y|. Now if we draw all points that have a L1 norm equals to a constant c, those points should form something (in red) like this: