why use the linear norm for sparse model why is l1 norm for sparse models used why is the l1 norm used for sparse models why l1 norm why does linear regression use a l1 norm why l1 norm why do l2 norms work why is l1 norm used sparsely why l1 norm sparse regression why is l1 norm sparse why linear regression should be sparse why l1 norm for sparse model why do linear regression models need norms why would you use an l1 norm for a sparse model why l1 norm for sparse model what type of norm for sparse model is used in regression why l2 norm for sparse model why use l1 and l2 norm sparse models why l1 model sparse model does L1 norm mean sparse data