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Math Forum » Discussions » Math Topics » alt.math.undergrad.independent

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

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qindars@gmail.com

Posts: 45
Registered: 1/12/07
Unusual notation
Posted: Mar 4, 2011 2:26 AM
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Hi,

I came across a notation in the text "Mathematical Analysis" by Malik
I can't recall ever seeing. It seems he is defining a function using a
symbol which is like a "left corner", i.e. |__ , so f(x) = |__ where
the argument, x, is on top of the underscore. Since I can't write a
letter with an underscore here, I'll write f(x) = (|__)(x). In neither
the appendices or introduction does he appear to define this notation.

This is in a section about sequences (pg 83, to be specific), where
Malik is defining the members of a sequence {a_n} as :

a_n = ( |__ )(3n) / [(|__)(n)]^3 where n is a natural number.

I'd say it was something like a floor function, but this wouldn't make
any sense in the context of this problem since all of the quantities
he is considering are integers.

Thnaks,
Fran

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