orbitparam.lib
LIB "orbitparam.lib"; ring R = 0,(s,t),dp; matrix A[3][3] = 1,s,st/2, 0,1,t, 0,0,1; matrixLog(A); ==> _[1,1]=0 ==> _[1,2]=s ==> _[1,3]=0 ==> _[2,1]=0 ==> _[2,2]=0 ==> _[2,3]=t ==> _[3,1]=0 ==> _[3,2]=0 ==> _[3,3]=0