On Finite {2,5}-Semiaffine Linear Spaces

In this paper, finite \( \{2,t\} \)-semiaffine linear spaces are investigated. When \( t = 5 \), their parameters are determined, and it is also proved that there is a single finite \( \{2, 5\} \)-semiaffine linear space on \( v = 20 \) points and with constant point degree \( 7 \).