[std-interval] Mathematical relations and default initialization

[Frédéric Goualard]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Dear Sylvain,

Sylvain Pion wrote:
> Guillaume Melquiond wrote:
>> Le jeudi 14 septembre 2006 à 10:21 +0200, Frédéric Goualard a écrit :
>>
>>> The nth_root_rel() operator does not appear in the standard. Is this
>>> omission on purpose? If indeed it is, why is it so?
>>
>> The nth_root_rel is purposely out of the proposal because nth_root is
>> out too :-). I don't think the omission is on purpose though. If people
>> feel it is useful, it can be added.
> 
> Let's be careful with the list of functions, especially those hard
> to implement.  Having too many may trigger resistance from the C++
> committee.  I already fear that the changes done in the revision
> won't be appreciated a lot on that aspect...  But we'll see.

I agree with you on that. My point is that if nth_root_rel() is not in
the standard, all relational operators should be discarded as well. As
far as I understand it, they are mainly of use to interval constraint
programming, and it makes no sense to be able to handle trigonometric
constraints while not being able to handle polynomial ones,
application-wise.

F.
- --
Frédéric Goualard                                 LINA - FRE CNRS 2729
                           Univ. of Nantes - Ecole des Mines de Nantes
Tel.: +33 2 51 12 58 38            2, rue de la Houssinière - BP 92208
Fax.: +33 2 51 12 58 12                         F-44322 NANTES CEDEX 3
http://goualard.free.fr/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFCk55fZ4hEUIHmqcRAofJAJ9njef2Xf23Gej+pva184gpNFmujQCff0Xn
q9/0xUGRUDy+s5SLUbLCxuk=
=38v0
-----END PGP SIGNATURE-----