Notation question: like a direct product

  • Thread starter pellman
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  • #1
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I am coming across a notation in a math text whose form and context suggest it is something like a direct product. The symbol is a multiplication X with a vertical line connecting the two left side ends. Can someone identify this symbol please?

The context can be seen here http://books.google.com/books?id=3J...CQrZcB&sa=X&oi=book_result&ct=result&resnum=1 2/3rds the way down on the page. This is an online preview of the text I am reading.
 

Answers and Replies

  • #3
675
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Hurkyl to the rescue again. That is it.

And look. The article lists the LaTex commands. [tex]
G = R^4 \ltimes SL(2,C)
[/tex]
 
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