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Math Help - algebraic notation

  1. #1
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    algebraic notation

    Hi there,

    I've got an exam in a couple of days and a particular math symbol is troubling me it's a plus sign within a circle.

    Any Ideas???

    Help would be much appreciated

    Thanks,
    Ally
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  2. #2
    Super Member flyingsquirrel's Avatar
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    Hello !
    Quote Originally Posted by ally2607 View Post
    [...] a particular math symbol is troubling me it's a plus sign within a circle.

    Any Ideas???
    Usually G \oplus H denotes the direct sum of G and H. ( G and H being two groups or two vector spaces or...)
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  3. #3
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    yeah, I'm working with vectors and vector spaces.

    Does this mean I've just to add the two vectors??

    The particular problem it's in relation to is u(the plus sign in a circle symbol) v = u-v

    thanks
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  4. #4
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    So do you mean  u \oplus v = u - v ?

    Sometimes  \oplus is also used to denote an operation.
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  5. #5
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    There is no one meaning for  \oplus .
    I have seen it used in many, many different ways.
    The best you can do is to follow your textbook/instructor.
    A definitions should have appeared there.
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  6. #6
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    Quote Originally Posted by bulls6x View Post
    So do you mean  u \oplus v = u - v ?

    Sometimes  \oplus is also used to denote an operation.

    no I mean u  \oplus v = v - u (in vector terms)
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