Isotopic equivalence by bézier curve subdivision for application to high performance computing

KE Jordan, J Li, TJ Peters, JA Roulier - Computer Aided Geometric Design, 2014 - Elsevier
For an arbitrary degree Bézier curve B, we first establish sufficient conditions for its control
polygon to become homeomorphic to B via subdivision. This is extended to show a …

Computational topology: Isotopic convergence to a stick knot

J Li, TJ Peters, KE Jordan, P Zaffetti - Topology and its Applications, 2016 - Elsevier
Computational topology is a vibrant contemporary subfield and this article integrates knot
theory and mathematical visualization. Previous work on computer graphics developed a …

[HTML][HTML] Topological subtleties for molecular movies

J Li, TJ Peters, K Marinelli, E Kovalev… - Topology and its …, 2015 - Elsevier
Synchronous movies permit visual analysis of shape perturbation during molecular
simulations. The molecule is conceptualized as a knot and modeled as a spline curve. As …

[PDF][PDF] Topology during subdivision of Bézier curves II: Ambient isotopy

J Li, TJ Peters, JA Roulier - Preprint, 2012 - researchgate.net
It is of increasing contemporary interest to preserve ambient isotopy during geometric
modeling. Bézier curves are pervasive in computer aided geometric design, as one of the …

[PDF][PDF] Topology during subdivision of Bézier curves I: Angular convergence & homeomorphism

J Li, TJ Peters, JA Roulier - Preprint, 2012 - researchgate.net
arxiv:1211.0353v2 [math.GT] 20 Nov 2012 Page 1 Topology during Subdivision of Bézier Curves
I: Angular Convergence & Homeomorphism J. Lia, TJ Peters 1b, JA Roulierc aDepartment of …

Exact computation for existence of a knot counterexample

K Marinelli, TJ Peters - Applied General Topology, 2019 - riunet.upv.es
[EN] Previously, numerical evidence was presented of a self-intersecting Bezier curve
having the unknot for its control polygon. This numerical demonstration resolved open …

[HTML][HTML] Subdivision of Bézier curves for ambient isotopy in molecular modeling

KE Jordan, K Marinelli, TJ Peters, JA Roulier… - Topology and its …, 2019 - Elsevier
Knots are prevalent mathematical models in molecular algorithms, requiring isotopically
equivalent piecewise linear (PL) approximations for visualization and analyses. Local …

Knot visualization experiments for verifiable molecular movies

J Li, TJ Peters, KE Jordan - arxiv preprint arxiv:1304.5641, 2013 - arxiv.org
Classical topological concepts are applied to understand high performance computing
simulations of molecules writhing in three dimensional space. These simulations produce …

Exact Computation for Existence of a Knot Counterexample

TJ Peters, K Marinelli - arxiv preprint arxiv:1711.10276, 2017 - arxiv.org
Previously, numerical evidence was presented of a self-intersecting Bezier curve having the
unknot for its control polygon. This numerical demonstration resolved open questions in …

Isotopic equivalence from Bézier curve subdivision

J Li, TJ Peters, JA Roulier - arxiv preprint arxiv:1211.0354, 2012 - arxiv.org
We prove that the control polygon of a Bezier curve B becomes homeomorphic and ambient
isotopic to B via subdivision, and we provide closed-form formulas to compute the number of …