This option allows the user to select the starting index for the new variables added in computing Hom(J,J) as a ring. The default value is 0 and is what most users will use. The option is needed for the iteration implemented in integralClosure.
Functions with optional argument named Index :
idealizer(..., Index => ...) -- Sets the starting index on the new variables used to build the endomorphism ring Hom(J,J). If the program idealizer is used independently, the user will generally want to use the default value of 0. However, when used as part of the integralClosure computation the number needs to start higher depending on the level of recursion involved.
ringFromFractions(..., Index => ...) (missing documentation)