%0 Journal Article %T On $\ell_1$-regularized estimation for nonlinear models that have sparse underlying linear structures %A Zhiyi Chi %J Mathematics %D 2009 %I arXiv %X In a recent work (arXiv:0910.2517), for nonlinear models with sparse underlying linear structures, we studied the error bounds of $\ell_0$-regularized estimation. In this note, we show that $\ell_1$-regularized estimation in some important cases can achieve the same order of error bounds as those in the aforementioned work. %U http://arxiv.org/abs/0911.4899v1