PGL(4) acts transitively on M(-1,2). (English) Zbl 0515.14012
MSC:
14F05 | Sheaves, derived categories of sheaves, etc. (MSC2010) |
14D20 | Algebraic moduli problems, moduli of vector bundles |
57R20 | Characteristic classes and numbers in differential topology |
14L30 | Group actions on varieties or schemes (quotients) |