Quiver Meeting - Mario De Marco - Shared screen with speaker view
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I have a question, but my microphone is not working, sorry. When you count 5d hypers by computing genus zero GV, what property of the hyper is captured by the homology class dependence "beta" of the GV? For example take two GV at different degree, suppose they are both 1. In which way do the two hypers differ? Are all genus zero GV some 5d hypers, or there is some condition on the degree?
Do you ever get negative GV invariants? At least for compact CY I know many examples in which it happens. How does the sign of the GV relate to a property of the 5d hyper?
the numerical value of the GV is negative
for a given genus and degree
in compact examples it happens
In noncompact, I don't know, so I was wondering about this