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Member functions (for example nf.disc) are supported only when there is
no ambiguity on the type of the argument. For a variable the syntax is
v:type inside a declaration, where v is the variable name and
type is the type.
Expressions can also be typed (i.e., typecasted). The precise use of typing
is outside the use of this tutorial, but in the context of member functions
we note the most useful types:
- nf
- for ordinary number fields, i.e., a result given by the GP function nfinit.
- bnf
- for big number fields, i.e., a result given by the GP function bnfinit which includes class and unit group data.
- bnr
- for ray class groups, i.e., a result given by the GP function bnrinit.
- ell
- for elliptic curves, i.e., a result given by the GP function ellinit.
- gal
- for galois extensions, i.e., a result given by the GP function galoisinit.
- prid
- for prime ideals, i.e., a component of the result given by the GP function idealprimedec.
Bill Allombert
2002-11-04