Extending Van Cott's bounds for the $\tau$-invariant of satellite knots.

link: http://arxiv.org/abs/0912.4297
Abstract

We generalize C. Van Cott's results on the $\tau$ and $s$-invariants of
cabled knots to apply to general satellite knots. This paper uses no
Heegaard-Floer homology, relying on more geometric techniques.