theorems of Fantechi-G\"{o}ttsche and Ravi-Sreedhar. The main technical ingredients are a treatment of the equivariant $K$-theory and equivariant Gysin map of sheaf stacks and a formula for the virtual Todd class. [4/4 of https://t.co/oP0kozo8Mc]
theorems in the setting of almost perfect obstruction theory in both the non-equivariant and equivariant cases, including cosection localized versions. These generalize and remove technical assumptions from the virtual Riemann-Roch [3/4 of https://t.co/…
the author as the appropriate notion in order to define invariants in $K$-theory for many moduli stacks of interest, including generalized $K$-theoretic Donaldson-Thomas invariants. In this paper, we prove virtual Riemann-Roch [2/4 of https://t.co/oP0k…
This is the third in a series of works devoted to constructing virtual structure sheaves and $K$-theoretic invariants in moduli theory. The central objects of study are almost perfect obstruction theories, introduced by Y.-H. Kiem and [1/4 of https://t.…