Real enumerative invariants relative to the anti-canonical divisor and their refinementWe introduce new invariants of the projective plane (and, more generally, of
certain toric surfaces) that arise from the appropriate enumeration of real
elliptic curves. These invariants admit a refinement (according to the quantum
index) similar to the one introduced by Grigory Mikhalkin in the rational case.
We also construct tropical counterparts of the refined elliptic invariants
under consideration and establish a tropical algorithm allowing one to compute,
{\it via} a suitable version of the correspondence theorem, the above
invariants.
arxiv.org