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fs = ps/1000
Figure 2.16 Detail of the launch
end. Note the unidirectional
character of the Gaussian beam
source, and the weak reflected
field leaking back through the
illumination plane after
travelling about 110 µm.
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
eps0 = 1/(c*c*mu0)
3.7.1. Reserved Names
Defining variables with the same name as a function
(user or built-in) is legal but not a good idea. If you
do it, the variable will override the function in all
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
CONFINE
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