Option variable
algexact
Default value: false
algexact
affects the behavior of algsys
as follows:
If algexact
is true
,
algsys
always calls solve
and then uses realroots
on solve
's failures.
If algexact
is false
, solve
is called only if
the eliminant was not univariate, or if it was a quadratic or
biquadratic.
Thus algexact: true
doesn't guarantee only exact
solutions, just that algsys
will first try as hard as it can to give
exact solutions, and only yield approximations when all else fails.