Re: Re: finite domains

*To*: mathgroup at smc.vnet.net*Subject*: [mg52747] Re: [mg52691] Re: finite domains*From*: János <janos.lobb at yale.edu>*Date*: Sat, 11 Dec 2004 05:22:24 -0500 (EST)*References*: <cp3t2v$9ai$1@smc.vnet.net> <200412100122.UAA18894@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Drago, According to the Book you can use both. However I do not know, because I do not know how to define domains like: {Complexes }, {Reals }, {Algebraics }, {Rationals }, {Integers }, {Primes }, {Booleans } Well, I was wrong in my previous e-mail, because Booleans is a finite domain. So again, I am interested to know how can I define a user domain - in my case a finite one - and use all the domain related functions of Mathematica on it and able to use it with patterns. In[1]:= Information["Booleans", LongForm -> False] "Booleans represents the \ domain of booleans, as in x \ \[Element] Booleans."*Button[ More\[Ellipsis], ButtonData :> "Booleans", Active -> True, ButtonStyle -> "RefGuideLink"] does not give much insight. With Longform->True I get just one step further: Attributes[Booleans] = {Protected} So, the question is: "user-defined domains" or "custom domains"... Help... János On Dec 9, 2004, at 8:22 PM, Drago Ganic wrote: > Hi group, > Here is another question: > Should we use Element for finite domains, or should we use **only** > MemberQ > for them ??! > > Greetings from Croatia, > Drago Ganic > > > > "János" <janos.lobb at yale.edu> wrote in message > news:cp3t2v$9ai$1 at smc.vnet.net... >> Hi, >> >> When I look the book I see just infinite built-in domains, like >> Integer >> etc... I am wondering if finite domains can be created and if all the >> domain related functions would work on it. As an example, I have >> {North, West, South, East} in mind. >> >> Thanks ahead, >> János >> ---------------------------------------------- >> Trying to argue with a politician is like lifting up the head of a >> corpse. >> (S. Lem: His Master Voice) >> > > ---------------------------------------------- Trying to argue with a politician is like lifting up the head of a corpse. (S. Lem: His Master Voice)

**References**:**Re: finite domains***From:*"Drago Ganic" <drago.ganic@in2.hr>