Well you are dealing with numerically exctreme values here. Let's look at the factor of (x**2+y**2) inside the lambda:
sage: (exp(I*2000*(1.60217662*10**(-19))/(299792458*6.6260700*10**(-34)))-(sqrt( ....: I*(1.60217662*10**(-19))/(4*6.62607004*10**(-34)*299792458*2000))-((((1.60 ....: 217662*10**(-19))**2)*2000**2)/(((6.62607004*10**(-34))**2)**299792458**2) ....: ))) +infinity + NaN*I Using inexact numerics will not work if you exceed machine limits. It is even impossible for Sage to compute the value using exact numerics: sage: (exp(I*2000*(160217662/100000000*10**(-19))/(299792458*66260700/10000000*1 ....: 0**(-34)))-(sqrt(I*(160217662/100000000*10**(-19))/(4*662607004/100000000* ....: 10**(-34)*299792458*2000))-((((160217662/100000000*10**(-19))**2)*2000**2) ....: /(((662607004/100000000*10**(-34))**2)**299792458**2)))) sage/src/sage/rings/rational.pyx in sage.rings.rational.Rational.__pow__ (build/cythonized/sage/rings/rational.c:24103)() 2575 return x 2576 elif nn > 0: -> 2577 sig_on() 2578 mpz_pow_ui(mpq_numref(x.value), mpq_numref(_self.value), nn) 2579 mpz_pow_ui(mpq_denref(x.value), mpq_denref(_self.value), nn) MemoryError: failed to allocate 617894185381562160 bytes -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
