If a section of the piecewise polynomial is identically zero, the values (x[begin], nan) are appended to the root list.
If the piecewise polynomial is not continuous, and the sign changes across a breakpoint, the breakpoint is added to the root set if :None:None:`report_discont` is True.
Polynomial coefficients, as above
Find roots of pp(x) == y
.
Whether to report discontinuities across zero at breakpoints as roots
Whether to consider roots obtained by extrapolating based on first and last intervals.
Compute real roots of a real-valued piecewise polynomial function.
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