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Topic: Unusual notation
Replies: 13   Last Post: Mar 8, 2011 4:05 PM

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Brian M. Scott

Posts: 1,286
Registered: 12/6/04
Re: Unusual notation
Posted: Mar 4, 2011 8:34 PM
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On Fri, 04 Mar 2011 13:13:23 -0500, David Bernier
<david250@videotron.ca> wrote in
<news:ikra4906sr@news1.newsguy.com> in
alt.math.undergrad,sci.math:

[...]

> I'm wondering if you might have this edition:
> "New Age International, 1982 - 379 pages" as shown here:
> < http://books.google.com/books?id=FyybL1ma4twC > .


> I do seem to remember a notation quite similar to this:

>|
>|
>| n
>|____


> (page 82, 3.3 Solved Problems, Example 3).

> I'm pretty sure I saw it earlier in the book. If it's a
> match (around page 82), you might look earlier in the
> book, e.g. Example 9, page 63:


> "Show that for any number x, lim x^n / (|_ (n) ) = 0.

> [Solution]

> Let a_n = x^n / (|_ (n) ) .

> (therefore) a_{n+1}/a_n = x^{n+1}/(|_ (n+1) ) * (|_ (n) ) / x_n

I'm pretty sure that that last should be x^n, not x_n.

> = x/(n+1) [etc.] "

Here it's clearly the factorial: [x^(n+1)/(n+1)!] * n!/x^n =
x/(n+1).

[...]

Brian



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