SOME SHARP BILINEAR SPACEāTIME ESTIMATES FOR THE WAVE EQUATION
SOME SHARP BILINEAR SPACEāTIME ESTIMATES FOR THE WAVE EQUATION
We prove a family of sharp bilinear spaceātime estimates for the half-wave propagator . As a consequence, for radially symmetric initial data, we establish sharp estimates of this kind for a range of exponents beyond the classical range.