id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 326,preimage over ground rings: division by zero resp. segmentation fault,seelisch,seelisch,"The following code runs ok over Q but crashes over Z: ring r1 = integer,(x,y,z),dp; ideal i1 = x2,y-z; ring r2 = integer,(a,b),dp; map m = r1,a,b,a+b; ideal i2 = m(i1); setring r1; preimage(r2, m, i2); As a first step, enabling 'preimage' between polynomial rings over the SAME ground ring would be fine.",bug,closed,minor,3-1-3 and higher,dontKnow,3-1-2,fixed,"preimage, ring",anne@…