Closed
Description
This sucks:
sage: SR(1.93902384092834082309480238482348293402384908) + SR(1)
2.939023840928341
It should do this:
sage: SR(1.93902384092834082309480238482348293402384908) + SR(1)
2.93902384092834082309480238482348293402384908
How to implement this? Use bfloat in Maxima. Here are some examples:
(%i41) block([fpprec:50], bfloat(%pi));
(%o41) 3.1415926535897932384626433832795028841971693993751b0
Have to do some weird crap to coerce in mpfr's:
(%i1) block([fpprec:50], bfloat(1.93902384092834082309480238482348293402384908));
Warning: Float to bigfloat conversion of 1.939023840928341
(%o1) 1.9390238409283409299344632850674846197472777518007b0
(%i3) block([fpprec:50], bfloat(193902384092834082309480238482348293402384908)/10^44);
(%o3) 1.93902384092834082309480238482348293402384908b0
When simplifying an expression be sure to compute the prec of it as
the min of the precs of all the leaves; integers have infinite precision.
Component: calculus
Issue created by migration from https://trac.sagemath.org/ticket/1286