  In this paper, we study local well-posedness for the Navier-Stokes equations
(NSE) with the arbitrary initial value in homogeneous Sobolev-Lorentz spaces
$\dot{H}^s_{L^{q, r}}(\mathbb{R}^d):= (-\Delta)^{-s/2}L^{q,r}$ for $d \geq 2, q
> 1, s \geq 0$, $1 \leq r \leq \infty$, and $ \frac{d}{q}-1 \leq s <
\frac{d}{q}$, this result improves the known results for $q > d,r=q, s = 0$
(see M. Cannone (1995) and M. Cannone and Y. Meyer (1995)) and for $q =r= 2,
\frac{d}{2} - 1 < s < \frac{d}{2}$ (see M. Cannone (1995, J. M. Chemin (1992)).
In the case of critical indexes ($s=\frac{d}{q}-1$), we prove global
well-posedness for NSE provided the norm of the initial value is small enough.
The result that is a generalization of the result of M. Cannone (1997) for $q =
r=d, s=0$.

Analysis of PDEs