Intersections of the Hermitian surface with irreducible quadrics in $PG(3,q^2)$, $q$ odd

Angela Aguglia, Luca Giuzzi

In $PG(3,q^2)$, with $q$ odd, we determine the possible intersection sizes of a Hermitian surface $\mathcal{H}$ and an irreducible quadric $\mathcal{Q}$ having the same tangent pla…