'Shorter axis of the ellipse (if it can be determined) else vradius.
Returns
minor : number or expression
See Also
hradius, vradius, major
Examples
>>> from sympy import Point, Ellipse, Symbol
>>> p1 = Point(0, 0)
>>> e1 = Ellipse(p1, 3, 1)
>>> e1.minor
1
>>> a = Symbol(\'a\')
>>> b = Symbol(\'b\')
>>> Ellipse(p1, a, b).minor
b
>>> Ellipse(p1, b, a).minor
a
>>> m = Symbol(\'m\')
>>> M = m + 1
>>> Ellipse(p1, m, M).minor
m'

@property
def minor(self):

    ab = self.args[1:3]
    if (len(ab) == 1):
        return ab[0]
    (a, b) = ab
    o = ((a - b) < 0)
    if (o == True):
        return a
    elif (o == False):
        return b
    return self.vradius
