Hi - I would appreciate if someone could point me to a link explaining the difference (if there is a difference) between: * <type 'sage.rings.real_mpfr.RealLiteral'> * (Here I input x=3.) *<type 'float'>* (Here I input xx=float(3)) *<type 'sage.rings.real_mpfr.RealNumber'>* (Here I input 1/x) . My page: http://sage.math.canterbury.ac.nz/home/pub/247 Thanks so much, Linda
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