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-   -   Triangular numbers (http://book.caltech.edu/bookforum/showthread.php?t=4259)

Elroch 05-03-2013 03:50 PM

Triangular numbers
At the bottom of page 104, shouldn't {Q(Q+3)}\over2 be {(Q+1)(Q+2)}\over2 ?

Elroch 05-06-2013 08:00 AM

Re: Triangular numbers
It's only now it occurs to me that the printed dimension is that of the hyperplane with first co-ordinate 1, and the latter is that of the whole vector space, so no typo!

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