Tibshirani introduced once a more general type of Lasso, where the regularizer is
$$\parallel D \alpha \parallel_1$$
instead of $\parallel \alpha \parallel_1$.
[See paper](http://www.stat.cmu.edu/~ryantibs/papers/genlasso.pdf)

However, there is nearly no discussion about this form and I wonder why since its a great way to deal with derivative smoothness regularizers.

- Is there an easy way I overlooked  to transform a general Lasso to the standard Lasso form? 

Thank you!