diff --git a/doc/src/fix_alchemy.rst b/doc/src/fix_alchemy.rst index 7a5ee71021..4f3acc62bc 100644 --- a/doc/src/fix_alchemy.rst +++ b/doc/src/fix_alchemy.rst @@ -81,15 +81,16 @@ This fix stores a global scalar (the current value of :math:`\lambda_p`) and a global vector or length 3 which contains the potential energy of the first partition, the second partition and the combined value, respectively. The global scalar is unitless and "intensive", the vector -is in :doc:`energy units ` and "extensive". This values can be +is in :doc:`energy units ` and "extensive". These values can be used by any command that uses a global value from a fix as input. See the :doc:`Howto output ` doc page for an overview of LAMMPS output options. The value of :math:`\lambda_p` is influenced by the *start/stop* keywords of the :doc:`run ` command. Without them it will be ramped -linearly from 1.0 to 0.0 or 0.0 to 1.0 during the steps of a run, with -*start/stop* keywords the ramp us from the *start* time step to the +linearly from 1.0 to 0.0 (partition 1) and 0.0 to 1.0 (partition 2) +during the steps of a run, with +*start/stop* keywords the ramp is from the *start* time step to the *stop* timestep. This allows to break down a simulation over multiple *run* commands or to continue transparently from a restart.