Grothendieck-Witt

Slogan: for a ring \(R\), the ring of virtual nondegenerate quadratic forms on \(R\).
- Has a quotient, the Witt ring (quotient by metabolic or hyperbolic forms)
Shows up in Milnor K theory

🗓️ Timeline

2021-05-10

Grothendieck-Witt group: formal differences of isomorphism classes of nondegenerate symmetric bilinear forms.

Links to this page

unresolved links output

Milnor K theory in 2021-04-25, 2021-05-04, Grothendieck-Witt
quadratic form

rank signature trace Grothendieck-Witt