Maxima Manual. Node: Definitions for Constants Constants
Constants
20.1: Definitions for Constants
 Variable: E

 The base of natural logarithms, e, is represented in MACSYMA
as %E.
 Variable: FALSE

 the Boolean constant, false. (NIL in LISP)
 Variable: MINF

 real minus infinity.
 Variable: PI

 "pi" is represented in MACSYMA as %PI.
 Variable: TRUE

 the Boolean constant, true. (T in LISP)
Constants
Constants