· N. Cotfas:
Coverings with regular polygons obtained by projection,
Quasicrystals. The Silver Jubilee, Tel Aviv, Israel, Oct. 14-19, 2007
* abstract.doc
* poster.dvi
* Some pictures
* article.ps
* article.pdf
* article.dvi
* article.tex
· N. Cotfas:
Permutation representations with application to quasicrystals and carbon nanotubes,
17th Symposium on Condensed Matter Physics- SFKM 2007 ,
Vrsac, Serbia, Sept. 16-20, 2007
* abstract.pdf
* abstract.ps
* talk.zip
* talk.pdf
· N. Cotfas:
Modified version of the strip projection method and applications,
International Conference on Aperiodic Crystals ,
Zao, Miyagi, Japan, Sept. 17-22, 2006
*abstract.doc
* poster.tex
* poster.pdf
* poster.dvi
* poster.ps
* aperiodic06.tex
* aperiodic06.pdf
* aperiodic06.dvi
* aperiodic06.ps
* original-of-fig4right.ps
* original-of-fig5right.ps
* software
· N. Cotfas:
Group representations with application to quasicrystals and carbon nanotubes,
26th International Colloquium on Group Theoretical Methods in Physics ,
New York, June 26-30, 2006
*abstract.doc
* article.zip
* article.pdf
* article.ps
* article.dvi
* invited-talk.tex
* invited-talk.pdf
* invited-talk.ps
* invited-talk.dvi
· N. Cotfas:
Shape invariant hypergeometric type operators and applications,
MASSEE International Congress on Mathematics MICOM-2006,
Paphos, Cyprus, May 31- June 4, 2006
*abstract.doc
* talk.tex
* talk.pdf
* talk.ps
* talk.dvi
*article.doc (unpublished)
· N. Cotfas:
Associated hypergeometric-type functions and coherent states,
8th WSEAS International Conference on APPLIED MATHEMATICS,
Puerto De La Cruz, Tenerife, Dec. 16-18, 2005
* article.tex
* article.pdf
* article.ps
* article.dvi
* talk.tex
* talk.pdf
* talk.ps
* talk.dvi
* full-article.tex
* full-article.pdf
* full-article.ps
* full-article.dvi
· N. Cotfas:
Symmetries of hypergeometric type special functions,
4th International Symposium "Quantum Theory and Symmetries"
incorporating
6th International Workshop
"Lie Theory and Its Applications in Physics", Varna, August 15-21, 2005
* abstract.tex
* abstract.pdf
* abstract.ps
* abstract.dvi
* talk.tex
* talk.dvi
* talk.pdf
* talk.ps
* article.tex
* article.dvi
* article.pdf
* article.ps
· N. Cotfas:
An alternate mathematical model for single-wall carbon nanotubes,
6th International Conference on the Science and Application
of Nanotubes, Goteborg, June 26-July 1, 2005
* abstract.html
* poster.tex
* poster.pdf
* poster.ps
* figure1.html
* figure2.html
· N. Cotfas:
On the self-similarities of the mathematical models used in quasicrystal physics,
Second Conference on Self-Similarity and Applications, Toulouse,
June 20-24, 2005
* abstract.tex
* abstract.pdf
* abstract.dvi
* abstract.ps
* poster.tex
* poster.dvi
* software for quasicrystals
· N. Cotfas:
Permutation representations defined by G-clusters with application to quasicrystal physics,
Discrete Groups and Geometric Structures with Applications IV,
Oostende, May 31-June 3, 2005
* abstract.tex
* abstract.pdf
* abstract.dvi
* abstract.ps
* software for quasicrystals
* talk.tex
* talk.pdf
* talk.ps
* cluster.eps
· N. Cotfas:
Representations of the symmetry groups of carbon nanotubes and applications,
Discrete Groups and Geometric Structures with Applications IV,
Oostende, May 31-June 3, 2005
* abstract.tex
* abstract.pdf
* abstract.ps
* poster.tex
* poster.pdf
* poster.ps
* figure1.html
* figure2.html
· N. Cotfas:
On the strip projection method and symmetry properties of the window,
9th International Conference on Quasicrystals ICQ9,
Ames (Iowa-USA), May 22-26, 2005
* abstract.html
* article.tex
* article.pdf
* article.ps
* software for quasicrystals
* poster.tex
* poster.pdf
* poster.ps
* cluster.eps
· N. Cotfas:
Quasiperiodic packings of icosahedral clusters obtained by projection,
2th National Conference on Theoretical Physics,
Constanta, August 26-29, 2004
· N. Cotfas:
Quasiperiodic packings of icosahedral clusters obtained by projection,
11th International Conference "Symmetry Methods in Physics",
Prague, June 21-24, 2004
· N. Cotfas:
Quasiperiodic packings of icosahedral clusters obtained by projection,
Fourth European Congress of Mathematics, Stockholm, June 27-July 2, 2004
· N. Cotfas:
Systems of orthogonal polynomials defined by hypergeometric type equations,
Fourth European Congress of Mathematics, Stockholm, June 27-July 2, 2004
· N. Cotfas:
Systems of orthogonal polynomials defined by hypergeometric type equations,
International Workshop on Orthogonal Polynomials: Orthogonal
Polynomials
and Mathematical Physics, Leganes, July 5-8, 2004
· N. Cotfas:
Representations of the icosahedral group with application to quasicrystals,
International Conference on Aperiodic Crystals,
Bello Horizonte (Brazil), Sept. 8-13, 2003
* article.doc
* article.ps
· N. Cotfas:
Hypergeometric type functions in a supersymmetric approach,
XIV International Congress on Mathematical Physics,
Lisbon, July 28-August 2, 2003
*
· N. Cotfas:
Raising and lowering operators in the theory of hypergeometric type equations,
5th Congress of Romanian Mathematicians, Pitesti, June 22-28, 2003
*
· N. Cotfas:
Special functions, raising and lowering operators,
XXIV International Colloquium on Group
Theoretical Methods in Physics , Paris, July 15-20, 2002
· N. Cotfas:
A group-theoretic approach to quasicrystals,
International Conference on Aperiodic Crystals,
Nijmegen (Holland), July 2000
· N. Cotfas:
Finite graphs associated with a cut-and-project set,
DI-CRM Workshop on Mathematical Physics, Prague, June, 2000
· N. Cotfas:
Self-similarities of model sets and their diffraction spectrum,
7th International Conference on Quasicrystals,
Stuttgart, Sept. 1999
· N. Cotfas and J._L. Verger-Gaugry:
Models of quasicrystals defined by G-clusters and their self-similarities,
Mathematics of Quasicrystals, Paris, Sept. 23-25, 1998
*
· N. Cotfas and J.-L. Verger-Gaugry:
G-clusters and quasicrystals,
International Conference on Aperiodic Crystals, Alpe d'Huez, August, 1997
· N. Cotfas:
Cluster models of quasicrystals obtained by using n-dimensional
permutation representations
of finite groups associated wuth their orbits,
Colloque Quasicristaux , Paris , June 5-7, 1996
· N. Cotfas:
4-Dimensional crystallography and the diamond structure,
Quasicrystals International School Balatonfured , Hungary, May 13-20, 1995
· N. Cotfas:
Une classe d'operateurs Oh7-invariants et
applications dans la physique des semiconducteurs,
Colloque franco-roumain de mathematiques purres et appliquees ,
Paris, May 1-8, 1994