我們討論的是在R上，用ϕ(x) = x2造出Sϕ(x, t) = B(x, √t)這個section，而B(x, √t)是一個以x為中心，以√t為半徑的開區間。最後我們用這個section 造出一個Monge-Ap`ere奇異積分算子。;Let ϕ(x) = x2 be a strictly convex and smooth function on R, we construct Sϕ(x, t) = B(x, √t), where B(x, √t) is a open interval with center x and radius √t. Then the section Sϕ satisfies the condition of section. we also construct an example of the Monge-Ap`ere singular integral operator.
