147 citations · 550 across the 42 of their papers we have counts for
5 papers · 1 filter
Hochster duality in derived categories and point-free reconstruction of schemes
Joachim Kock, Wolfgang Pitsch
For a commutative ring , we exploit localization techniques and point-free topology to give an explicit realization of both the Zariski frame of (the frame of radical ideals…
Characteristic numbers of rational curves with cusp or prescribed triple contact
Joachim Kock
This note pursues the techniques of modified psi classes on the stack of stable maps (cf. [Graber-Kock-Pandharipande]) to give concise solutions to the characteristic number proble…
Descendant invariants and characteristic numbers
Tom Graber, Joachim Kock, Rahul Pandharipande
On a stack of stable maps, the psi classes are modified by subtracting certain boundary divisors. These modified psi classes are compatible with forgetful morphisms, and are well-s…
Tangency quantum cohomology
Joachim Kock
Let X be a smooth projective variety. Using modified psi classes on the stack of genus zero stable maps to X, a new associative quantum product is constructed on the cohomology spa…
Recursion for twisted descendants and characteristic numbers of rational curves
Joachim Kock
On a space of stable maps, the psi classes are modified by subtracting certain boundary divisors. The top products of modified psi classes, usual psi classes, and classes pulled ba…