/usr/share/freemat/help/text/csch.mdc is in freemat-help 4.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | CSCH CSCH Hyperbolic Cosecant Function
Usage
Computes the hyperbolic cosecant of the argument.
The syntax for its use is
y = csch(x)
|