id summary reporter owner description type status priority milestone component resolution keywords cc merged author reviewer upstream work_issues branch commit dependencies stopgaps
22149 solve can't handle certain multi-equation settings kcrisman "See [https://ask.sagemath.org/question/36205/cant-solve-equation-with-abs-in-the-terms/ this ask.sagemath question]. Basically, at least in certain situations involving `abs()`, you
{{{
var('x y a b')
f=[1+y-a*abs_symbolic(x)==x, b*x==y]; f
solve(f, [x, y])
}}}
gives boom, or more precisely
{{{
TypeError: cannot coerce arguments: no canonical coercion from to Symbolic Ring
}}}
since it somehow is trying to make this into one object. But
{{{
assume(x>0)
solve(f, [x, y])
}}}
gives not boom. So somehow our code for recognizing when we have a system of equations isn't working right in the first case. Note that
{{{
var('x y a b')
f=[1+y-a*x==x, b*x==y]
solve(f,[x,y]
}}}
apparently works fine." defect new major sage-7.5 symbolics N/A