Fixed error in lj/gromacs

git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@6819 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/Eqs/pair_gromacs.tex

@@ -7,8 +7,8 @@ E_{LJ} & = & 4 \epsilon \left[ \left(\frac{\sigma}{r}\right)^{12} -
                        \left(\frac{\sigma}{r}\right)^6 \right] + S_{LJ}(r)
                        \qquad r < r_c \\
 E_C & = & \frac{C q_i q_j}{\epsilon  r} + S_C(r) \qquad r < r_c \\
-S(r) & = & 0 \qquad r < r_1 \\
-S(r) & = & A (r - r_1)^2 + B (r - r_1)^3 \qquad  r_1 < r < r_c
+S(r) & = & C \qquad r < r_1 \\
+S(r) & = & \frac{A}{3} (r - r_1)^3 + \frac{B}{4} (r - r_1)^4 + C \qquad  r_1 < r < r_c
 \end{eqnarray*}                           
 
 \end{document}