713 citations
- Horia Hulubei National Institute for R and D in Physics and Nuclear EngineeringRO11 papers
- National Institute of Materials PhysicsRO7 papers
- Romanian AcademyRO7 papers
- European Organization for Nuclear ResearchCH6 papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del SudIT6 papers
- University of CataniaIT6 papers
- University of Maryland, College ParkUS6 papers
- Vrije Universiteit BrusselBE5 papers
- California Institute of TechnologyUS4 papers
- Karlsruhe Institute of TechnologyDE4 papers
- National Institute for AstrophysicsIT4 papers
- Technical University of MunichDE4 papers
Showing 2006 · math-phShow all
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math-ph2006
Aperiodic packings of clusters obtained by projection
Nicolae Cotfas
Atomic-resolution electron microscope images show that a quasicrystal is a quasiperiodic packing of clusters. The outer atomic shells of multi-shell clusters occuring in quasicryst…
math-ph2006★ 6 cited
Shape invariant hypergeometric type operators with application to quantum mechanics
Nicolae Cotfas
A hypergeometric type equation satisfying certain conditions defines either a finite or an infinite system of orthogonal polynomials. The associated special functions are eigenfunc…
math-ph2006★ 3 cited
On the linear representations of the symmetry groups of single-wall carbon nanotubes
Nicolae Cotfas
The positions of atoms forming a carbon nanotube are usually described by using a system of generators of the symmetry group. Each atomic position corresponds to an element of the…