IBM Release 1.93 manual Reserved Names, Confine

fs	=	ps/1000
as	=	fs/1000
kHz	=	1000
MHz	=	1000*kHz
GHz	=	1000*MHz
THz	=	1000*GHz
EHz	=	1000*THz
pi	=	3.141592653589793
twopi	=	2*pi
deg	=	pi/180
degree	=	deg
rad	=	1.0
cycle	=	twopi
c	=	299792458
mu0	=	4*pi*1e-7	Figure 2.16 Detail of the launch
eps0	=	1/(c*c*mu0)
			end. Note the unidirectional
3.7.1. Reserved Names			character of the Gaussian beam
			source, and the weak reflected
Defining variables with the same name as a function
			field leaking back through the
(user or built-in) is legal but not a good idea. If you
			i l l u m i n a t i o n p l a n e a f t e r
do it, the variable will override the function in all
			travelling about 110 µm.
subsequent statements. Because of the potential for
confusion, it is forbidden to define a user function with

the same name as a built-in function. Built-in variables have the same precedence as user variables (i.e. the highest) so defining functions with these names is forbidden, because they could never be evaluated.

List of all reserved variable names: freq lambda omega x y z k u v w

Hz kHz MHz GHz THz EHz cycle deg degree rad pi twopi km m cm mm um micron nm angstrom s ms us ns ps fs as c mu0 eps0 tol penalty merit

List of reserved function names:

ABS MAX MIN FORMAT TRUNC ROUND ROOT1D MINIMIZE INTEGRAL SQRT POW SIN COS TAN ATAN ATAN2 ASIN ACOS LN EXP ERF ELINTK ELINTK1 BOWTIEZ0 AU_N AU_K SI_N SI_K ASI_N ASI_K PSI_N PSI_K NI_N NI_K CU_N CU_K SIN_N SIN_K SIO2_N SIO2_K

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