A Marstrand-type restricted projection theorem in ${\mathbb{R}}^3$

Antti Käenmäki, Tuomas Orponen, Laura Venieri

Marstrand's projection theorem from $1954$ states that if $K\subset {\mathbb{R}}^3$ is an analytic set, then, for ${\mathcal{H}}^2$ almost every $e\in S^2$, the orthogonal proj…