Gauss-Lucas Theorem: The convex hull of the zeros of a polynomial with complex coefficients contains the zeros of its derivative.
— Tamás Görbe (@TamasGorbe) May 16, 2020
Zeros of P (in red) are bouncing around and the zeros of P', P'', P''', … nicely dance in the nested convex hulls. pic.twitter.com/dWbVv0wICp