id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 417,Sheaf cohomology commands based on local duality are not correct for 0th cohomology,decker,decker,"Here is an example: LIB ""sheafcoh.lib""; ring R = 0,(s,t,x(0..3)),Dp; ideal I = x(0)-s4,x(1)-s3t,x(2)-st3,x(3)-t4; ideal J = eliminate(I,s*t); ring S = 0,x(0..3),Dp; ideal I = imap(R,J); resolution Ir = mres(I,0); print(betti(Ir),""betti""); module M = Ir[1]; intvec DV = 0; attrib(M,""isHomog"",DV); dimH(0,M,1); sheafCoh(M,0,4); sheafCohBGG(M,-3,3);",bug,new,major,3-1-5 and higher,singular-libs,3-1-4,,,