<p>This paper investigates several distinct attempts to generalize in higher dimension the standard 2-dimensional phyllotaxy set construction. We first recall known constructions for these sets on 2<i>D</i> manifolds of constant curvature (the Euclidean plane <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mathbb {R}^2\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>2</mn> </msup> </math></EquationSource> </InlineEquation>, the sphere <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\mathbb {S}^2\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">S</mi> </mrow> <mn>2</mn> </msup> </math></EquationSource> </InlineEquation> and the hyperbolic plane <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\mathbb {H}^2\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">H</mi> </mrow> <mn>2</mn> </msup> </math></EquationSource> </InlineEquation>). We then propose a first attempt to get a 3<i>D</i> phyllotactic set by piling up suitably shifted Euclidean 2<i>D</i> phyllotactic sets. A different, radially triggered, solution is then analyzed. An interesting phyllotactic set on the hypersphere <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\mathbb {S}^3\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">S</mi> </mrow> <mn>3</mn> </msup> </math></EquationSource> </InlineEquation> is then generated using a Hopf fibration approach. Finally, a simple 4-dimensional example is presented, generated as a simple product of two 2-dimensional planar sets. A 3<i>D</i> phyllotaxy candidate is then derived by applying a “Cut and Project” algorithm.</p>

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Some attempts toward 3-dimensional phyllotaxy

  • Rémy Mosseri,
  • Jean-François Sadoc

摘要

This paper investigates several distinct attempts to generalize in higher dimension the standard 2-dimensional phyllotaxy set construction. We first recall known constructions for these sets on 2D manifolds of constant curvature (the Euclidean plane \(\mathbb {R}^2\) R 2 , the sphere \(\mathbb {S}^2\) S 2 and the hyperbolic plane \(\mathbb {H}^2\) H 2 ). We then propose a first attempt to get a 3D phyllotactic set by piling up suitably shifted Euclidean 2D phyllotactic sets. A different, radially triggered, solution is then analyzed. An interesting phyllotactic set on the hypersphere \(\mathbb {S}^3\) S 3 is then generated using a Hopf fibration approach. Finally, a simple 4-dimensional example is presented, generated as a simple product of two 2-dimensional planar sets. A 3D phyllotaxy candidate is then derived by applying a “Cut and Project” algorithm.