We compute equivariant fundamental classes of orbits in GL(2)-representations. As applications, we find degrees of the orbit closures corresponding to elliptic fibrations and self-maps of the projective line.
The latest pdf is gl2orbits.pdf. The latest updates, in reverse chronological order, are as follows.
- Appendix A: Correct the omission of the stabiliser.
- arxiv 2405.09849 version 1