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Johannes Nordström

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A lost lemma about periodicity in a grid of long exact sequences?

ac.commutative-algebra at.algebraic-topology homological-algebra

jan 4 at 17:04 Johannes Nordström 695●3●7

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Why do I need densities in order to integrate on a non-orientable manifold?

The vanishing of the 2nd plurigenus of a sextic threefold

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Chern classes of a blow-up at a point

(Second) Chern class of projective space, blown up in a linear subvariety

Picard/cohomology lattice of surfaces of low degree in $\mathbb P^3$

Poincare duality with boundary conditions

Calculating chern numbers yields a contradiction, why?

Lines on degree 2n-3 Fermat hypersufaces

Isometry of K3 surface.

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ag.algebraic-geometry× 7
intersection-theory× 3
dg.differential-geometry× 3
chern-classes× 3
at.algebraic-topology× 3
k3-surfaces× 2
teaching
projective-space
picard-group
integration

homological-algebra
gt.geometric-topology
geometry
four-manifolds
divisors
algebraic-surfaces
ac.commutative-algebra

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