Thread: Math question... kinda abstract

  1. #1
    Just because ygfperson's Avatar
    Join Date
    Jan 2002
    Posts
    2,490

    Math question... kinda abstract

    Do all expressions have a domain? Or is it just for functions?

  2. #2
    Linguistic Engineer... doubleanti's Avatar
    Join Date
    Aug 2001
    Location
    CA
    Posts
    2,459
    yes all expressions have a domain.
    hasafraggin shizigishin oppashigger...

  3. #3
    Just because ygfperson's Avatar
    Join Date
    Jan 2002
    Posts
    2,490
    Why?

  4. #4
    Linguistic Engineer... doubleanti's Avatar
    Join Date
    Aug 2001
    Location
    CA
    Posts
    2,459
    oh, whoops should have explained...

    well, functions are merely shorthand notations for longer expressions, and since functions have domains (be they the whole complex plane, only real parts, subsets of it due to singularities, etc), expressions do as well.
    hasafraggin shizigishin oppashigger...

  5. #5
    ....
    Join Date
    Aug 2001
    Location
    Groningen (NL)
    Posts
    2,380
    A function is a mapping of one set on another set, like f:A->B. The first set is the domain, so each function has a domain.

  6. #6
    Registered User
    Join Date
    Jan 2002
    Location
    Vancouver
    Posts
    2,212
    Originally posted by doubleanti
    oh, whoops should have explained...

    well, functions are merely shorthand notations for longer expressions, and since functions have domains (be they the whole complex plane, only real parts, subsets of it due to singularities, etc), expressions do as well.
    Woah, woah, hold on there! You sure that isn't a quote from star trek?

    I feel incredibly stupid whenever da talks, moreso than usual.

  7. #7
    Pursuing knowledge confuted's Avatar
    Join Date
    Jun 2002
    Posts
    1,916
    "The whole complex plane" would mean all numbers, real, imaginary, and complex (combination of the two)

    "Only real parts" would mean part of the real numbers (you know...the ones represented by your fingers and toes.

    By "singularities," I believe he means holes, such as the one found in y=(x^2)/(x-2) at x=2.

    So...no star trek, just some combination of pre-calc and calc class.
    Away.

  8. #8
    Just because ygfperson's Avatar
    Join Date
    Jan 2002
    Posts
    2,490
    "Only real parts" would mean part of the real numbers (you know...the ones represented by your fingers and toes.
    Or parts thereof.

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Math question
    By leonm54 in forum A Brief History of Cprogramming.com
    Replies: 9
    Last Post: 05-24-2007, 05:12 PM
  2. Stupid Math Question....really stupid
    By ToLazytoSignIn in forum A Brief History of Cprogramming.com
    Replies: 9
    Last Post: 01-16-2003, 07:36 PM
  3. Very large signed integer math question
    By Criz in forum C Programming
    Replies: 8
    Last Post: 12-01-2002, 12:43 PM
  4. Very simple question, problem in my Code.
    By Vber in forum C Programming
    Replies: 7
    Last Post: 11-16-2002, 03:57 PM
  5. Math Question
    By DarkEldar77 in forum C++ Programming
    Replies: 2
    Last Post: 09-17-2001, 12:52 PM