About this article
Published Online: Nov 03, 2016
Page range: 517 - 528
Received: Sep 11, 2016
Accepted: Nov 03, 2016
DOI: https://doi.org/10.21042/AMNS.2016.2.00041
Keywords
© 2016 Jorge Delgado, Juan Manuel Peña, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
In this paper we revisit the problem of monotonicity preservation of curves and surfaces and we provide some new proofs and open problems. In particular, we prove a new formula for the derivation of rational Bézier curves. We also deal with the rational monotonicity preservation of rational Bézier surfaces and a related conjecture is presented.