git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@705 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/improper_class2.html

@@ -44,9 +44,9 @@ theta2, theta3 are the equilibrium positions of those angles.  Again,
 atom J (the 2nd atom in the quadruplet) is the atom of symmetry in the
 theta angles, since it is always the center atom.
 </P>
-<P>Note that defining 4 atoms to interact in this way, does not mean that
-bonds necessarily exist between I-J, J-K, or K-L, as they would in a
-linear dihedral.
+<P>Since atom J is the atom of symmetry, normally the bonds J-I, J-K, J-L
+would exist for an improper to be defined between the 4 atoms, but
+this is not required.
 </P>
 <P>See <A HREF = "#Sun">(Sun)</A> for a description of the COMPASS class2 force field.
 </P>

doc/improper_class2.txt

@@ -41,9 +41,9 @@ theta2, theta3 are the equilibrium positions of those angles.  Again,
 atom J (the 2nd atom in the quadruplet) is the atom of symmetry in the
 theta angles, since it is always the center atom.
 
-Note that defining 4 atoms to interact in this way, does not mean that
-bonds necessarily exist between I-J, J-K, or K-L, as they would in a
-linear dihedral.
+Since atom J is the atom of symmetry, normally the bonds J-I, J-K, J-L
+would exist for an improper to be defined between the 4 atoms, but
+this is not required.
 
 See "(Sun)"_#Sun for a description of the COMPASS class2 force field.
 

doc/improper_cvff.html

@@ -40,7 +40,8 @@ the other 3 atoms.
 </P>
 <P>Note that defining 4 atoms to interact in this way, does not mean that
 bonds necessarily exist between I-J, J-K, or K-L, as they would in a
-linear dihedral.
+linear dihedral.  Normally, the bonds I-J, I-K, I-L would exist for an
+improper to be defined between the 4 atoms.
 </P>
 <P>The following coefficients must be defined for each improper type via
 the <A HREF = "improper_coeff.html">improper_coeff</A> command as in the example

doc/improper_cvff.txt

@@ -37,7 +37,8 @@ the other 3 atoms.
 
 Note that defining 4 atoms to interact in this way, does not mean that
 bonds necessarily exist between I-J, J-K, or K-L, as they would in a
-linear dihedral.
+linear dihedral.  Normally, the bonds I-J, I-K, I-L would exist for an
+improper to be defined between the 4 atoms.
 
 The following coefficients must be defined for each improper type via
 the "improper_coeff"_improper_coeff.html command as in the example

doc/improper_harmonic.html

@@ -38,12 +38,14 @@ is with respect to the other 3 atoms.
 </P>
 <P>Note that defining 4 atoms to interact in this way, does not mean that
 bonds necessarily exist between I-J, J-K, or K-L, as they would in a
-linear dihedral.
+linear dihedral.  Normally, the bonds I-J, I-K, I-L would exist for an
+improper to be defined between the 4 atoms.
 </P>
-<P>The following coefficients must be defined for each improper type via the
-<A HREF = "improper_coeff.html">improper_coeff</A> command as in the example above, or in
-the data file or restart files read by the <A HREF = "read_data.html">read_data</A>
-or <A HREF = "read_restart.html">read_restart</A> commands:
+<P>The following coefficients must be defined for each improper type via
+the <A HREF = "improper_coeff.html">improper_coeff</A> command as in the example
+above, or in the data file or restart files read by the
+<A HREF = "read_data.html">read_data</A> or <A HREF = "read_restart.html">read_restart</A>
+commands:
 </P>
 <UL><LI>K (energy/radian^2)
 <LI>X0 (degrees) 

doc/improper_harmonic.txt

@@ -35,12 +35,14 @@ is with respect to the other 3 atoms.
 
 Note that defining 4 atoms to interact in this way, does not mean that
 bonds necessarily exist between I-J, J-K, or K-L, as they would in a
-linear dihedral.
-
-The following coefficients must be defined for each improper type via the
-"improper_coeff"_improper_coeff.html command as in the example above, or in
-the data file or restart files read by the "read_data"_read_data.html
-or "read_restart"_read_restart.html commands:
+linear dihedral.  Normally, the bonds I-J, I-K, I-L would exist for an
+improper to be defined between the 4 atoms.
+
+The following coefficients must be defined for each improper type via
+the "improper_coeff"_improper_coeff.html command as in the example
+above, or in the data file or restart files read by the
+"read_data"_read_data.html or "read_restart"_read_restart.html
+commands:
 
 K (energy/radian^2)
 X0 (degrees) :ul