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Math Help - Given this definition, is there one or two Rs?

  1. #1
    s3a
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    Given this definition, is there one or two Rs?

    The definition uses R for relation but I am wondering if the R near the "element of" symbol is also the "relation" notation or if it is used for "reals".

    Sorry if this is a dumb question but any input would be greatly appreciated!
    Thanks in advance!
    Attached Thumbnails Attached Thumbnails Given this definition, is there one or two Rs?-inverse-relation-definition.jpeg  
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  2. #2
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    It's all the same R. Remember a relation can be written as ordered pairs:

    aRb\Leftrightarrow (a,b)\in R.
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  3. #3
    s3a
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    So, the right hand side means "Point (a,b) is part of the relation R"?
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