# rmath miscellaneous functions - avram - a virtual machine code interpreter
avram - a virtual machine code interpreter

#### D.16.2 `rmath` miscellaneous functions

Some less frequently used real valued mathematical functions are also accessible by the `rmath` library interface. The functions with names in this group take a single real operand.

         gammafn         lgammafn        digamma
         trigamma        tetragamma      pentagamma

The ones in this group take a pair of real operands `(`x`,`y`)`.

         beta            lbeta           bessel_j       bessel_y

Those remaining take a triple of real operands `(`x`,(`y`,`z`))`.

         bessel_i        bessel_k

An alternative and better documented selection of Bessel functions is provided by the `bes` library interface (bes).