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In page Mandelbrot set:

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The tricorn fractal, also called the Mandelbar set, is the connectedness locus of the anti-holomorphic family z z ¯ 2 + c {\displaystyle z\mapsto {\bar {z}}^{2}+c} .[1][2] It was encountered by Milnor in his study of parameter slices of real cubic polynomials.[citation needed] It is not locally connected.[1] This property is inherited by the connectedness locus of real cubic polynomials.[citation needed]