dfg2dfg(1) on Linux
The text 2bdf1703dcd2, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
calculate approximations of problems
Flags it lists
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-horn -
-linear -
-monadic -
-shallow