Atlas of products for wave-Sobolev spaces on $\mathbf R^{1+3}$

Details Atlas of products for wave-Sobolev spaces on $\mathbf R^{1+3}$ Atlas of products for wave-Sobolev spaces on $\mathbf R^{1+3}$

2010-01-29

arxiv.org/abs/1001.5372v1

Mathematics

Analysis of PDEs

31 pages

Scientific paper

The wave-Sobolev spaces $H^{s,b}$ are $L^2$-based Sobolev spaces on the Minkowski space-time $\R^{1+n}$, with Fourier weights are adapted to the symbol of the d'Alembertian. They are a standard tool in the study of regularity properties of nonlinear wave equations, and in such applications the need arises for product estimates in these spaces. Unfortunately, it seems that with every new application some estimates come up which have not yet appeared in the literature, and then one has to resort to a set of well-established procedures for proving the missing estimates. To relieve the tedium of having to constantly fill in such gaps "by hand", we make here a systematic effort to determine the complete set of estimates in the bilinear case. We determine a set of necessary conditions for a product estimate $H^{s_1,b_1} \cdot H^{s_2,b_2} \hookrightarrow H^{-s_0,-b_0}$ to hold. These conditions define a polyhedron $\Omega$ in the space $\R^6$ of exponents $(s_0,s_1,s_2,b_0,b_1,b_2)$. We then show, in space dimension $n=3$, that all points in the interior of $\Omega$, and all points on the faces minus the edges, give product estimates. We can also allow some but not all points on the edges, but here we do not claim to have the sharp result. The corresponding result for $n=2$ and $n=1$ will be published elsewhere.

Affiliated with

Also associated with

No associations

Rating

Atlas of products for wave-Sobolev spaces on $\mathbf R^{1+3}$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Atlas of products for wave-Sobolev spaces on $\mathbf R^{1+3}$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atlas of products for wave-Sobolev spaces on $\mathbf R^{1+3}$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-676691