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Fixed typo in elastic constant how-to

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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@5088 f3b2605a-c512-4ea7-a41b-209d697bcdaa
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athomps
2010-10-21 21:18:22 +00:00
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doc/Section_howto.html
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@ -1586,7 +1586,7 @@ constants. In three dimensions, this tensor has 3^4=81 elements. Using
Voigt notation, the tensor can be written as a 6x6 matrix, where C_ij
is now the derivative of s_i w.r.t. e_j. Because s_i is itself a
derivative w.r.t. e_i, it follows that C_ij is also symmetric, with at
most 6*5/2 = 21 distinct elements.
most 7*6/2 = 21 distinct elements.
</P>
<P>At zero temperature, it is easy to estimate these derivatives by
deforming the cell in one of the six directions using the command