Results 1 to 9 of 9

Math Help - Definition question

  1. #1
    Newbie
    Joined
    Aug 2013
    From
    Canada
    Posts
    9

    Definition question

    Hi, can somebody tell me the definition of : and,or

    Thank you
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,969
    Thanks
    1788
    Awards
    1

    Re: Definition question

    Quote Originally Posted by philomath View Post
    Hi, can somebody tell me the definition of : and,or
    Thank you
    Please post an exact question. As posted, that means absolutely nothing.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,454
    Thanks
    1868

    Re: Definition question

    Plato, I disagree. PhiloMath is clearly asking for definitions of the words "and" an "or". Since this is a "math help" forum, I presume he means their definitions as connectors in symbolic logic.

    "And" is a connector such that the two statements P, Q are both true, then "P and Q" is true. Under any other conditions, "P and Q" is false.

    "Or" is a connector such that if the two statements P, Q are both false, then "P or Q" is false. Under any other conditions, "P or Q" is true.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,969
    Thanks
    1788
    Awards
    1

    Re: Definition question

    Quote Originally Posted by HallsofIvy View Post
    Plato, I disagree. PhiloMath is clearly asking for definitions of the words "and" an "or". Since this is a "math help" forum, I presume he means their definitions as connectors in symbolic logic.

    "And" is a connector such that the two statements P, Q are both true, then "P and Q" is true. Under any other conditions, "P and Q" is false.

    "Or" is a connector such that if the two statements P, Q are both false, then "P or Q" is false. Under any other conditions, "P or Q" is true.
    Your are reading an awfully lot into what was posted.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,454
    Thanks
    1868

    Re: Definition question

    Well, the colon set away from the end of the sentence puzzled me a bit and quotes would have helped.
    If it had been

    'Hi, can somebody tell me the definition of: "and", "or".

    Thank you'
    it would have been easier to read.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Senior Member
    Joined
    Sep 2013
    From
    USA
    Posts
    334
    Thanks
    136

    Re: Definition question

    AND and OR, usually capitalized, are Boolean logical operators. AND for association, OR for alternate.

    Examples: you ask for a computer AND a printer, means you will not accept the one withour the other, a computer OR a printer means you will accept either one. Of course if you are given the other one for free you will be happy.

    In programming, these operators are used in IF statement, or a logical statement. If the logical statement is satisfied, the program bypass the next statement to a referenced label.
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Newbie
    Joined
    Jan 2014
    From
    Drums
    Posts
    7
    Thanks
    2

    Re: Definition question

    Hello,

    "And" means to multiply the probabilities of each *separate* result required for a success.

    "OR" means to add up the probabilities of each result that would be considered a success.
    Follow Math Help Forum on Facebook and Google+

  8. #8
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,454
    Thanks
    1868

    Re: Definition question

    THAT assumes that the question was about probability. And does not say anything about the definitions which was the question.
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Newbie
    Joined
    Feb 2014
    From
    London
    Posts
    3

    Re: Definition question

    Boolean logical operators

    Like HallsofIvy said:
    "And" is a connector such that the two statements P, Q are both true, then "P and Q" is true. Under any other conditions, "P and Q" is false.

    "Or" is a connector such that if the two statements P, Q are both false, then "P or Q" is false. Under any other conditions, "P or Q" is true.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Filters: Question about Definition
    Posted in the Advanced Algebra Forum
    Replies: 4
    Last Post: October 4th 2012, 06:54 AM
  2. slope definition question
    Posted in the Differential Equations Forum
    Replies: 2
    Last Post: October 22nd 2010, 12:03 AM
  3. Hartshorne Definition Question
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: August 5th 2010, 09:39 AM
  4. Question on Definition of Derivative
    Posted in the Calculus Forum
    Replies: 1
    Last Post: May 17th 2010, 05:18 PM
  5. Question on a definition
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: March 12th 2009, 10:20 AM

Search Tags


/mathhelpforum @mathhelpforum