<dd>Only use topology A.</dd>
<dt><b>yes</b></dt>
<dd>Interpolate between topology A (lambda=0) to topology B (lambda=1)
-and write the derivative of the Hamiltonian with respect to lambda (as specified with <b>dhdl_derivatives</b>), or the Hamiltonian differences w.r.t. other lambda valies (as specified with <b>foreign_lambda</b>) to
+and write the derivative of the Hamiltonian with respect to lambda (as specified with <b>dhdl_derivatives</b>), or the Hamiltonian differences with respec to other lambda values (as specified with <b>foreign_lambda</b>) to
the energy file and/or to <tt>dhdl.xvg</tt>, where they can be processed by, for example <tt>g_bar</tt>.
The potentials, bond-lengths and angles are interpolated linearly as
described in the manual. When <b>sc_alpha</b> is larger than zero, soft-core
Free energy differences between different lambda values can then
be determined with <tt>g_bar</tt>.</dd>
<dt><b>dhdl_derivatives: (yes)</b></dt>
-<dd>If yes (the default), the derivatives of the Hamiltonian w.r.t. lambda at each <b>nstdhdl</b> step are written out. These values are needed for interpolation of linear energy differences with <tt>g_bar</tt> (although the same can also be achieved with the right <b>foreign lambda</b> setting, that may not be as flexible), or with thermodynamic integration</dd>
+<dd>If yes (the default), the derivatives of the Hamiltonian with respect to lambda at each <b>nstdhdl</b> step are written out. These values are needed for interpolation of linear energy differences with <tt>g_bar</tt> (although the same can also be achieved with the right <b>foreign lambda</b> setting, that may not be as flexible), or with thermodynamic integration</dd>
<dt><b>sc_alpha: (0)</b></dt>
<dd>the soft-core parameter, a value of 0 results in linear interpolation of
the LJ and Coulomb interactions</dd>