Publications of of Dr. Echi, O. E.


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[1] P. Bakhtary and O. Echi, "On Minimal Hamming Compatible Distances," RAIRO Theoretical Informatics and Applications, 2014. Accepted.    2014 Accepted
[2] I. AlRasasi, O. E. Echi, and N. Ghanmi, "On the Korselt Set of a Squarefree Composite Number," Mathematical Reports of the Academy of Science Royal Society of Canada, vol. 35, pp. 1-15, 2013.    2013 Published
[3] O. Echi and N. Ghanmi, "The Korselt Set of pq," International Journal of Number Theory, vol. 8, pp. 299-309, 2012.    2012 Published
[4] O.Echi, "The Categories of Flows of Set and Top," Topology and its Applications, vol. 159, pp. 2357-2366, 2012.    2012 Published
[5] O. Echi and M. Oueld Abdallahi, "On the Spectralification of a Hemispectral Space," Journal of Algebra and its Applications, vol. 10, pp. 687-699, 2011.    2011 Published
[6] A. Ayache, O. Echi, and M. Naimi, "On Kronecker Polynomials," Rocky Mountain Journal of Mathematics, vol. 41, pp. 707-725, 2011.    2011 Published
[7] K. Belaid, L. Dridi, and O. Echi, "Submaximal and Door Compactifications," Topology and its Applications, vol. 158, pp. 1969-1975, 2011.    2011 Published
[8] K. Bouallegue, O. Echi, and P. Richard, "Korselt numbers and sets," International Journal of Number Theory, vol. 6, no. 2, pp. 257-269, Mar. 2010.    2010 Published
[9] O. Echi and S. Lazaar, "Quasihomeomorphisms and Lattice Equivalent Topological Spaces," Applied General Topology, vol. 10, no. 2, pp. 227-237, 2009.    2009 Published
[10] O. Echi, "The Cardinality of a Sphere relative to an Edit Distance," Applied Mathematical Sciences.(Ruse), vol. 3, pp. 813-824, 2009.    2009 Published
[11] O. Echi and S. Lazaar, "Reflective subcategories, Tychonoff Spaces and Spectral Spaces," Topology Proceedings, vol. 34, pp. 307-319, 2009.    2009 Published
[12] O. Echi and S. Lazaar, "Universal Spaces, Tychonoff and Spectral Spaces," Mathematical Proceedings of the Royal Irish Academy, vol. 109A, pp. 35-48, 2009.    2009 Published
[13] O. Echi and M. Naimi, "Primitive words and Spectral Spaces," New York Journal of Mathematics, vol. 14, pp. 719-731, 2008.    2008 Published
[14] M. E. Adams, K. Belaid, L. Dridi, and O. Echi, "Submaximal Spaces and Spectral Spaces," Mathematical Proceedings of the Royal Irish Academy, vol. 108A, pp. 137-147, 2008.    2008 Published
[15] O. Echi, "Sober Spaces and Sober Sets," Missouri Journal of Mathematical Sciences, vol. 20, pp. 60-72, 2008.    2008 Published
[16] O. Echi, R. Gargouri, and S. Lazaar, "On the Hochster Dual of a Topological space," Topology Proceedings, vol. 32, pp. 153-166, 2008.    2008 Published
[17] O. Echi, "Networks of Morphisms," Missouri Journal of Mathematical Sciences, vol. 19, no. 2, pp. 93-105, 2007.    2007 Published
[18] A. Ayache, D. E. Dobbs, and O. Echi, "On Maximal non-accp Subrings.," Journal of Algebra and its Applications, vol. 6, no. 5, pp. 873-894, 2007.    2007 Published
[19] O. Echi, "Williams Numbers," Mathematical Reports of the Academy of Science Royal Society of Canada, vol. 29, pp. 41-47, 2007.    2007 Published
[20] O. Echi, "On $T_D$-spaces," Missouri Journal of Mathematical Sciences, vol. 18, no. 1, pp. 54-60, 2006.    2006 Published
[21] A. Ayache and O. Echi, "Valuation and Pseudo-valuation Subrings of an Integral Domain," Communications in Algebra, vol. 34, no. 7, pp. 2467-2483, 2006.    2006 Published
[22] O. Echi, "Binomial Coefficients and Nasir al-Din al-Tusi," Scientific Research and Essay, vol. 1, no. 2, pp. 28-32, 2006.    2006 Published
[23] A. Ayache, D. E. Dobbs, and O. Echi, "Universal Mapping Properties of some Pseudovaluation Domains and Related Quasilocal Domains," International Journal of Mathematics and Mathematical Sciences, vol. 2006, no. Art. ID 72589, pp. 12 p, 2006.    2006 Published
[24] A. Ayache, D. E. Dobbs, and O. Echi, "Reflection of Some Quasi-local Domains," Journal of Algebra and its Applications, vol. 5, no. 2, pp. 201-213, 2006.    2006 Published
[25] K. Belaid, O. Echi, and R. Gargouri, "Two Classes of Locally Compact Sober Spaces.," International Journal of Mathematics and Mathematical Sciences, vol. 2005, no. 15, pp. 2421-2427, 2005.    2005 Published
[26] A. Ayache and O. Echi, "The Envelope of a Subcategory in Topology and Group Theory," International Journal of Mathematics and Mathematical Sciences, vol. 2005, no. 21, pp. 201-213, 2005.    2005 Published
[27] O. Echi and M. Ito, "Up-spectral Spaces and A-spectral Spaces," Questions and Answers in General Topology, vol. 23, no. 1, pp. 15-26, 2005.    2005 Published
[28] K. Belaid, O. Echi, and R. Gargouri, "A-spectral Spaces," Topology and its Applications, vol. 138, no. 1-3, pp. 315-322, 2004.    2004 Published
[29] O. Echi and R. Gargouri, "An Up-spectral Space Need not be A-spectral," New York Journal of Mathematics, vol. 10, pp. 271-277, 2004.    2004 Published
[30] K. Belaid, O. Echi, and S. Lazaar, "T(α,β)-spaces and the Wallman Compactification," International Journal of Mathematics and Mathematical Sciences, vol. 2004, no. 65-68, pp. 3717-3735, 2004.    2004 Published
[31] K. Belaid and O. Echi, "On a Conjecture about Spectral Sets," Topology and its Applications, vol. 139, no. 1-3, pp. 1-15, 2004.    2004 Published
[32] O. Echi, "Quasi-homeomorphisms, Goldspectral Spaces and Jacspectral Spaces," Bollettino della Unione Matematica Italiana, vol. (8) 6, pp. 489-507, 2003.    2003 Published
[33] O. Echi, "Topological Characterizations of Some Subspaces of a Spectral Space," Questions and Answers in General Topology, vol. 21, no. 2, pp. 109-123, 2003.    2003 Published
[34] E. Bouacida, O. Echi, G. Picavet, and E. Salhi, "An Extension Theorem for Sober Spaces and the Goldman Topology," International Journal of Mathematics and Mathematical Sciences, vol. 51, pp. 3217-3239, 2003.    2003 Published
[35] O. Echi and N. Jarboui, "On Residually Integrally Closed Domains," Demonstratio Mathematica, vol. 36, no. 3, pp. 543-550, 2003.    2003 Published
[36] A. Ayache, M. Ben Nasr, O. Echi, and N. Jarboui, "Universally Catenarian and Going-down Pairs of Rings," Mathematische Zeitschrift, vol. 238, no. 4, pp. 695-731, 2001.    2001 Published
[37] M. Ben Nasr, O. Echi, L. Izelgue, and N. Jarboui, "Pairs of Domains where all Intermediate Domains are Jaffard," Journal of Pure and Applied Algebra, vol. 145, no. 1, pp. 1-18, 2000.    2000 Published
[38] K. Belaid, B. Cherif, and O. Echi, "Quasi-spectral Binary Relations and Ordered Disjoint Unions," Journal of Mathematical Sciences (Calcutta), vol. 11, no. 2, pp. 139-157, 2000.    2000 Published
[39] E. Bouacida, O. Echi, and E. Salhi, "Feuilletages et Topologie Spectrale," Journal of Mathematical Society of Japan, vol. 52, no. 2, pp. 447-464, 2000.    2000 Published
[40] S. Ameziane, O. Echi, and I. Yengui, "Direct Systems of Localizations of Polynomial Rings," Acta Scientiarum Mathematicarum (Szeged), vol. 66, no. 3-4, pp. 465-476, 2000.    2000 Published
[41] O. Echi, "A Topological Characterization of the Goldman Prime Spectrum of a Commutative Ring," Communications in Algebra, vol. 28, no. 5, pp. 2329-2337, 2000.    2000 Published
[42] E. Bouacida, O. Echi, and E. Salhi, "Foliations, Spectral Topology, and Special Morphisms," Lecture Notes in Pure and Applied Mathematics, vol. 205, pp. 111-132, 1997.    1997 Published
[43] E. Bouacida, O. Echi, and E. Salhi, "Nonfinite Heights," Lecture Notes in Pure and Applied Mathematics, vol. 185, pp. 113-130, 1997.    1997 Published
[44] K. Belaid, B. Cherif, and O. Echi, "On Spectral Binary Relations," Lecture Notes in Pure and Applied Mathematics, vol. 185, pp. 79-88, 1997.    1997 Published
[45] E. Bouacida, O. Echi, and E. Salhi, "Topologies Associ\'es \`a une Relation Binaire et Relation Binaire Spectrale," Bollettino della Unione Matematica Italiana, vol. B (7) 10, pp. 417-439, 1996.    1996 Published
[46] A. Ayache, P. J. Cahen, and O. Echi, "Anneaux Quasi-pr\"uf\'eriens et $P$-anneaux.," Bollettino della Unione Matematica Italiana, vol. B (7) 10, pp. 1-24, 1996.    1996 Published
[47] A. Ayache, P. J. Cahen, and O. Echi, "Valuative Heights and Infinite Nagata Rings," Communications in Algebra, vol. 23, no. 5, pp. 1913-1926, 1995.    1995 Published
[48] O. Echi, "Sur les Hauteurs Valuatives," Bollettino della Unione Matematica Italiana, vol. B(7)9, pp. 281-297, 1995.    1995 Published
[49] O. Echi, "The altitude formula," Lecture Notes in Pure and Applied Mathematics, no. 153, pp. 99-103, 1994.    1994 Published
[50] O. Echi, "Transfert de la Notion de $C$-anneaux aux Produits Fibr\'es," Portugaliae Mathematica, vol. 51, no. 1, pp. 13-23, 1994.    1994 Published
[51] A. Ayache, P. J. Cahen, and O. Echi, "Intersection de Produits Fibr\'es et Formule de la Dimension," Communications in Algebra, vol. 22, no. 9, pp. 3495-3509, 1994.    1994 Published
[52] O. Echi, "$C$-anneaux, $E$-anneaux et Formule de la Dimension," Portugaliae Mathematica, vol. 50, no. 3, pp. 277-295, 1993.    1993 Published