0$, restricting it to functions of product type. In this range, $2
0$, the strong $L^p$-estimate is valid for functions of product type but not for general functions.
@article{1255958195, author = {TANAKA, Hitoshi}, title = {An Estimate for the Bochner-Riesz Operator on Functions of Product Type in $R^2$}, journal = {Tokyo J. of Math.}, volume = {24}, number = {2}, year = {2001}, pages = { 567-578}, language = {en}, url = {http://dml.mathdoc.fr/item/1255958195} }
TANAKA, Hitoshi. An Estimate for the Bochner-Riesz Operator on Functions of Product Type in $R^2$. Tokyo J. of Math., Tome 24 (2001) no. 2, pp. 567-578. http://gdmltest.u-ga.fr/item/1255958195/