def _set_div(x, y): # noqa:F811
"""
Divisions in interval arithmetic
https://en.wikipedia.org/wiki/Interval_arithmetic
"""
if (y.start * y.end).is_negative:
return Interval(-oo, oo)
if y.start == 0:
s2 = oo
else:
s2 = 1 / y.start
if y.end == 0:
s1 = -oo
else:
s1 = 1 / y.end
return set_mul(x, Interval(s1, s2, y.right_open, y.left_open))
def _set_div(x, y):
"""
Divisions in interval arithmetic
https://en.wikipedia.org/wiki/Interval_arithmetic
"""
from sympy.sets.setexpr import set_mul
from sympy import oo
if (y.start * y.end).is_negative:
return Interval(-oo, oo)
if y.start == 0:
s2 = oo
else:
s2 = 1 / y.start
if y.end == 0:
s1 = -oo
else:
s1 = 1 / y.end
return set_mul(x, Interval(s1, s2, y.right_open, y.left_open))
def _set_div(x, y):
"""
Divisions in interval arithmetic
https://en.wikipedia.org/wiki/Interval_arithmetic
"""
from sympy.sets.setexpr import set_mul
from sympy import oo
if (y.start*y.end).is_negative:
return Interval(-oo, oo)
if y.start == 0:
s2 = oo
else:
s2 = 1/y.start
if y.end == 0:
s1 = -oo
else:
s1 = 1/y.end
return set_mul(x, Interval(s1, s2, y.right_open, y.left_open))