roots(self, discontinuity=True, extrapolate=None)
Whether to report sign changes across discontinuities at breakpoints as roots.
If bool, determines whether to return roots from the polynomial extrapolated based on first and last intervals, 'periodic' works the same as False. If None (default), use :None:None:`self.extrapolate`.
Roots of the polynomial(s).
If the PPoly object describes multiple polynomials, the return value is an object array whose each element is an ndarray containing the roots.
Find real roots of the the piecewise polynomial.
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