Topological obstructions for rational cuspidal curves in Hirzebruch surfaces

Heegaard Floer Homologies and Rational Cuspidal Curves. Lecture notes.

“…Use methods of Koras and Palka to prove that every rational cuspidal curve in a Hirzebruch surface is rectifiable. See [63,64,8] for more on rational cuspidal curves in Hirzebruch surfaces. points are (2; 3), (2; 11), or (2; 5), (2; 9), or (2; 7), (2; 7).…”