Abstract
This paper presents an explicit optimal polynomial for approximating the quadratic Lupaş q‐Bézier curve. We first prove that the quadratic Lupaş q‐Bézier curve represents a hyperbola or a parabola. Then we research the approximation of quadratic Lupaş q‐Bézier curves by polynomials. Since the denominator of quadratic Lupaş q‐Bézier curves is a linear function, the explicit optimal constrained approximation is obtained. Finally, some numerical examples are presented to illustrate the effectiveness of the proposed method.
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