# Article

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Summary:
Let $D$ be a domain in $\mathbb{C}^2$. For $w \in \mathbb{C}$, let $D_w = \lbrace z \in \mathbb{C} \mid (z,w) \in D \rbrace$. If $f$ is a holomorphic and square-integrable function in $D$, then the set $E(D,f)$ of all $w$ such that $f(.,w)$ is not square-integrable in $D_w$ is of measure zero. We call this set the exceptional set for $f$. In this note we prove that for every $0<r<1$,and every $G_\delta$-subset $E$ of the circle $C(0,r) = \lbrace z \in \mathbb{C} \mid | z | =r \rbrace$,there exists a holomorphic square-integrable function $f$ in the unit ball $B$ in $\mathbb{C}^2$ such that $E(B,f) = E.$
References:
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