| -d der | Use ``der'' as name for the derivation (default is ``D''). |
| -i fmt | Use ``fmt'' for input format (default is ``infix''). |
| Currently only ``infix'' and ``lisp'' are supported. | |
| -q | Quiet mode, suppress all the informational output (banner, prompts and timings). |
| -x var | Use ``var'' as name for the independent variable (default is ``x''). |
| -y var | Use ``var'' as name for the extra variable in Darboux curves (default is ``y''). |
| -w name | Echo ``name'' to the mathematical output stream after executing each command. |