Ticket #4055 (new defect)

Opened 4 months ago

serious bug in polynomial multiplication

Reported by: robertwb Assigned to: tbd
Priority: blocker Milestone: sage-3.4
Component: algebra Keywords:
Cc:

Description

Seems to be something with the generic karatsuba, perhaps it should not be used for inexact rings? 

sage: R.<x> = RR[]
sage: (x-1e16)*(x-1e17)
 1.00000000000000*x^2 + 1.00000000000000e33

sage: R.<x> = RDF['y']['x']
sage: (x-1e123)*(x-1e100)
 1.0*x^2 + 1e+223