Timeline for Deformations and the dual numbers
Current License: CC BY-SA 2.5
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 28, 2010 at 17:40 | comment | added | Ketil Tveiten | And def's over the dual numbers (i.e. first order) are important because when calculating, one tends to do these first, and then calculate the obstruction to extending to higher order. | |
| Jul 28, 2010 at 9:12 | comment | added | Francesco Polizzi | Just a small comment on the terminology. Infinitesimal and first-order deformations are not the same thing; in fact, an infinitesimal deformation is a deformation over Spec($A$), where $A$ is an Artinian local $k$-algebra, whereas a first-order deformation corresponds to the special case $A=k[\epsilon]/(\epsilon^2)$. | |
| Jul 27, 2010 at 15:24 | history | answered | DamienC | CC BY-SA 2.5 |