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In the lecture note 6 about regularization, section 3.4: the l1 norm of a vector is simply the sum of the absolute values of the coordinates, and hence it is co
by buttery101 4y ago
In the lecture note 6 about regularization, section 3.4:
the l1 norm of a vector is simply the sum of the absolute values of the coordinates, and hence it
is continuous (and linear). I don't think that the l1 norm is linear since |x+y| # |x| + |y|.
- political12345 4y agoagreed.
- the_svd_doctor 4y agoTrue. Norms are never linear since they cannot be negative.
- fjkdlsjflkds 4y agoThey probably meant that it is positively homogeneous (i.e. |ax|=|a||x|), I would assume, since it's definitely not a linear function.