In mathematical notation, this implies that "Terms O(d^3) will always be small
compared to terms O(d^2) and O(d) for sufficiently small d". What's
"sufficiently small" has to be determined on a case to case basis, but once you
have checked that, it means "we know that there are more terms, but we can
neglect them because they are O(d^3) and d is small".
Herbert
bipul rakshit wrote:
Respected Sushil Auluck,
Thanks for your kind reply. As you said that the term means of order
delta cube.
But I just want to know the equation of that term. Means how that order
delta cube, mathematically looks like. I asked this because, using that
equation, I have to find the elastic constants.
regards
Bipul Rakshit
PhD in Physics
Computational Research Lab.
Barkatullah University,
Bhopal 462 026, India
Mob.: +919713445650
--- On *Mon, 13/7/09, Sushil Auluck /<[email protected]>/* wrote:
From: Sushil Auluck <[email protected]>
Subject: Re: [SIESTA-L] question about elastic constant
To: [email protected]
Date: Monday, 13 July, 2009, 9:48 PM
hi,
that means terms of order delta cubed (delta**3)......
s.auluck
> Dear Siesta Users,
> I have read the paper
> "S. Q. Wang, H. Q. Ye, J. Phys.: Condens. Matter 15 (2003) p. 5307."
> Â
> Most of the thing is clear to me, except in Equation (7) what is
"O(δ^3)"
> ? What does 'O' here.
>
>
> Please guide me for the same.
>
>
> Bipul Rakshit
>
> PhD in Physics
>
> Computational Research Lab.
>
> Barkatullah University,
>
> Bhopal 462 026, India
>
> Mob.: +919713445650
>
>
> See the Web's breaking stories, chosen by people like you.
Check
> out Yahoo! Buzz. http://in.buzz.yahoo.com/
........................................................................
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Department of Physics +91-512-6798177(Home)
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India E-mail:[email protected]
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