utfile

README.md

@@ -13,8 +13,18 @@ which will place a binary at `build/nstrophy`.
 
 The syntax for the execution of Nstrophy is
 ```bash
-./build/nstrophy [-p parameters] [-s savefile] <command>
+./build/nstrophy [-p parameters] [-s savefile] [-u u_outfile] <command>
 ```
+* `parameters` is a list of parameters for the computation, see
+  [Parameters](#parameters)
+
+* `savefile` is a file where the last step of the computation is saved in
+  binary format so that the computation can be resumed after it has terminated,
+  see
+  [Interrupting and resuming the computation](#interrupting-and-resuming-the-computation).
+
+* `u_outfile` is a file to which the final u is written in plain text format,
+  which can be used as an initial condition for a future computation.
 
 Nstrophy is written in C. The Makefile uses the GNU C Compiler.
 
@@ -114,7 +124,7 @@ should be a `;` sperated list of `key=value` pairs. The possible keys are
   norm.
 
 
-# Interrupting/resuming the computation
+# Interrupting and resuming the computation
 
 The computation can be interrupted by sending Nstrophy the `SIGINT` signal
 (e.g. by pressing `Ctrl-C`.) When Nstrophy receives the `SIGINT` signal, it