Geodesic
Quasi-projections of surfaces with boundaries
Contemporary Mathematics. Fundamental Directions, Proceedings of the International Conference on Mathematical Control Theory and Mechanics (Suzdal, July 3–7, 2009), Tome 42 (2011), pp. 15-22

Voir la notice de l'article provenant de la source Math-Net.Ru

We classify simple singularities of projections to a plane of surfaces embedded into three-space and equipped with a boundary up to a special equivalence relation that is more rough than the standard one. Relations to other classifications are described as well. 
@article{CMFD_2011_42_a1,
     author = {F. Alharbi and V. M. Zakalyukin},
     title = {Quasi-projections of surfaces with boundaries},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {15--22},
     publisher = {mathdoc},
     volume = {42},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2011_42_a1/}
}
TY  - JOUR
AU  - F. Alharbi
AU  - V. M. Zakalyukin
TI  - Quasi-projections of surfaces with boundaries
JO  - Contemporary Mathematics. Fundamental Directions
PY  - 2011
SP  - 15
EP  - 22
VL  - 42
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMFD_2011_42_a1/
LA  - ru
ID  - CMFD_2011_42_a1
ER  - 
%0 Journal Article
%A F. Alharbi
%A V. M. Zakalyukin
%T Quasi-projections of surfaces with boundaries
%J Contemporary Mathematics. Fundamental Directions
%D 2011
%P 15-22
%V 42
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMFD_2011_42_a1/
%G ru
%F CMFD_2011_42_a1
F. Alharbi; V. M. Zakalyukin. Quasi-projections of surfaces with boundaries. Contemporary Mathematics. Fundamental Directions, Proceedings of the International Conference on Mathematical Control Theory and Mechanics (Suzdal, July 3–7, 2009), Tome 42 (2011), pp. 15-22. http://geodesic.mathdoc.fr/item/CMFD_2011_42_a1/