سیرو سیاحت در ایران با راهنمایی بنام هرمان وایل

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[2] J. L. Bell and K. Herbert and W. Hermann, The Stanford Encyclopedia of Philosophy, (Spring 2011 Edition), Edward N. Zalta and ed, http://plato.stanford.edu/archives/spr2011/ entries/weyl/,M. Berger, 1987, Geometry. [3] M. Berger and I. Geometry, London, Berlin, Heidelberg: Springer-Verlag, 1987.
[4] C. Bier, Piety and Power in Early Sasanian Art, in Official Cult and Popular Religion in the Ancient Near East, E. Masushima, ed. Heidelberg: Universitätsverlag C. Winter, 1993 171–194.
[5] J. Bonner, Three Traditions of Self-similarity in Fourteenth and Fifteenth Century Islamic Geometric Ornament, in Proceedings ISAMA/Bridges: Mathematical Connections in Art, Music and Science, R. Sarhangi and N. Friedman, eds. Granada, 2003 1–12.
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[20] [Frieze Groups]: http://en.wikipedia.org/wiki/Frieze_group.
[21] [Groups]: http://en.wikipedia.org/wiki/Group_%28mathematics%29.
[22] [JUHEL]: Art, Architecture et Symétrie, http://home.nordnet.fr/\simajuhel/Weyl/weyl$_$intro. (in French).
[23] [Symmetry and Patterns]: The Art of Oriental Carpets: http://mathforum.org/geometry/rugs/symmetry/.
[24] [Wallpaper Groups]: http://en.wikipedia.org/wiki/Wallpaper_group#cite_ref-0
[25] [Wallpaper Groups]: http://www.clarku.edu/\simdjoyce/wallpaper/index.html