His promises did not correspond with what he actually did.

Hey, the Scooby gang's all here, Ven said.

Recently, the l0-least mean square (l0-LMS) algorithm has been proposed to identify sparse linear systems by employing a sparsity-promoting continuous function as an approximation of l0 pseudonorm penalty.

You need the nbsp in order for the cell to show like a regular cell (otherwise you get that raised looking space -- if you know what I mean).