'The periapsis of the ellipse.
The shortest distance between the focus and the contour.
Returns
periapsis : number
See Also
apoapsis : Returns greatest distance between focus and contour
Examples
>>> from sympy import Point, Ellipse
>>> p1 = Point(0, 0)
>>> e1 = Ellipse(p1, 3, 1)
>>> e1.periapsis
-2*sqrt(2) + 3'

@property
def periapsis(self):

    return (self.major * (1 - self.eccentricity))
