I think I already understood this distinction between type and parent. What
was not clear (and still is not, but I have homework to do about this
before making new noise on the list...) is how this translates in terms of
Provisorily, I conclude :
- type : look for something looking like a C type
- parent : look for a class
Le lundi 17 octobre 2016 15:16:04 UTC+2, Jeroen Demeyer a écrit :
> On 2016-10-17 15:10, Emmanuel Charpentier wrote:
> > Thank you Vincent. this is much clearer.
> > It seems that I have some things left to understand about the Sage class
> > and types hierarchies.
> There is a difference between a type and a parent.
> A parent is a mathematical object. It is the mathematical set that your
> object belongs to.
> A type is a computer-science object. It defines the implementation of
> your object and the methods that it has.
> Now, for CDF it turns out that there is a 1-to-1 correspondence between
> type and parent. But in most cases, this is not true. For example,
> elements of GF(2^2) and GF(17^3) have the same type but not the same
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