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Aditya Mahajan<FONT COLOR="#000000"> </FONT>2008/12/12 20:07:58<FONT COLOR="#000000">:</FONT> <BR>
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<FONT COLOR="#000000">></FONT>On Fri, 12 Dec 2008, Lars Madsen wrote: <BR>
<FONT COLOR="#000000">></FONT>> William Adams wrote: <BR>
<FONT COLOR="#000000">></FONT>>> Okay, I have: <BR>
<FONT COLOR="#000000">></FONT>>> $\sqrt{\frac{\sum d^2}{2n}}$ <BR>
<FONT COLOR="#000000">></FONT>>> Would it be okay to do: <BR>
<FONT COLOR="#000000">></FONT>>> $\sqrt{{\sum d^2}/{2n}}$ <BR>
<FONT COLOR="#000000">></FONT>> I don't see any problems with the second one, though some might prefer <BR>
<FONT COLOR="#000000">></FONT>> $\sqrt{\sum d^2/(2n)}$ <BR>
<FONT COLOR="#000000">></FONT><BR>
<FONT COLOR="#000000">></FONT>I typeset $\sqrt{\frac{\sum d^2}{2n}}$ using package nath and the output <BR>
<FONT COLOR="#000000">></FONT>is equivalent to $\sqrt{(\sum d^n)/2n}$ which seems to avoid ambiguity <BR>
<FONT COLOR="#000000">></FONT>about what is being summed. <BR>
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<FONT COLOR="#000000">Indeed, when I thought of the matter while shopping, I had forgotten the first </FONT><BR>
<FONT COLOR="#000000">example and thought \sum(d^2/2n) was ment, \sum binding the variable n. </FONT><BR>
<FONT COLOR="#000000">I haven't done math for a while and only now see that this series diverges, </FONT><BR>
<FONT COLOR="#000000">but it may show that the notation is significantly ambiguous in the way Aditya </FONT><BR>
<FONT COLOR="#000000">says (not with respect to 2n). And even if the reader knows what is meant </FONT><BR>
<FONT COLOR="#000000">from the context, such ambiguities may distract attention.</FONT><BR>
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<FONT COLOR="#000000">Great to learn about nath!</FONT><BR>
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<FONT COLOR="#000000">Cheers, </FONT><BR>
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<FONT COLOR="#000000"> Uwe. </FONT>
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