New Examples of Maximal Partial Line Spreads in \(PG(4, q)\)

We construct a class of maximal partial line spreads in \( \mathrm{PG}(4, q) \), that we call \( q \)-added maximal partial line spreads. We obtain them by depriving a line spread of a hyperplane of some lines and adding \( q+1 \) pairwise skew lines not in the hyperplane for each removed line. We do it in a theoretical way for every value of \( q \), and by a computer search for \( q \leq 16 \). More precisely, we prove that for every \( q \) there are \( q \)-added MPS of size \( q^2 + kq + 1 \), for every integer \( k = 1, \ldots, q-1 \), while by a computer search we get larger cardinalities.