Alain Togbe, Ph. D.
Associate Professor of Mathematics

Purdue University North Central
1401 S. U.S. 421
Westville, IN 46391

Phone: (219) 785-5458
Fax:(219) 785-5507
atogbe@pnc.edu
Office: SWRZ 302

     

Education
Ph.D. in Mathematics (Number Theory), Laval University, Quebec, Canada, 1997.
M.S. in Mathematics (Number Theory), Laval University, Quebec, Canada, 1994.

DEA in Mathematics (Differential Geometry), University of Abidjan, 1988.
B.S. in Mathematics, National University of Benin, 1984.

 

Teaching: Fall 2009

OFFICE HOURS

 

Monday

 9:00-9:50 AM and 1:30-2:20 PM

Tuesday

 By appointment

Wednesday

 9:00-9:50 AM and 1:30-2:20 PM

Thursday

 By appointment

Friday

9:00-9:50 AM and 1:30-2:20 PM

 

Courses Taught    Please go to Blackboard


   

Research

Algebraic Number Theory, specially Diophantine equations

 

Selected Publications

  1. (with He B.) A remark on the generalized Ramanujan-Nagell equation x2 - D = kn Accepted to appear in Annales des sciences mathématiques du Québec.

  2. (with He B., Walsh P. G ) On the size of the intersection of two Lucas sequences of distinct type. Accepted to appear in Annales des sciences mathématiques du Québec.

  3. (with He B.) On the number of solutions of the Diophantine equation axm - byn = c. Accepted to appear in the Bulletin of the Australian Mathematical Society.

  4.  (with He B.) On the positive integer solutions of the exponential Diophantine equation ax+(3a2-1)y=(4a2-1)z. Accepted to appear in Advances in Mathematics (Chinese).

  5. (with Filipin A) On the family of Diophantine triples {k+2, 4k, 9k+6}. Accepted to appear in Acta Mathematica Academiae Paedagogicae Nyiregyhaziensis.

  6. (with He B.) On the D(-1) triple {1, k2+1, k2+2k+2} and its unique D(1)-extension.

  7. (Ulas M.) On the Diophantine equation z2 = f(x)2 ± f(y)2. Accepted to appear in Publicationes Mathematicae Debrecen.

  8. (with Luca F., Tengely S.) On the Diophantine Equation x2 + C = 4yn. Accepted to appear  in  Annales des sciences mathématiques du Québec.

  9. (with Kihel O., Luca F.,) Variants of the Diophantine Equation n! + 1 = y2. Accepted to appear in Portugaliae Mathematica.

  10. (with B. He, B. Jadrijevic) Solutions of a class of quartic Thue inequalities. Accepted to appear in Glas. Mat. Ser. III.

  11. (with F. Luca, P. Stanica) On a Diophantine equation of Stroeker. Accepted to appear Bulletin of the Belgian Mathematical Society, Simon Stevin. .

  12. (with Florian Luca) On the Diophantine Equation x4 - q4 = py3. Accepted to appear in Rocky Mountain Journal of Mathematics.

  13. (with B. He) The Diophantine equation nx + (n+1)y = (n+2)z revisited. The Glasgow Mathematical Journal, Volume 51, Issue 03, September 2009, 659-667.

  14. (with Yang S., He H.),  A 2×2 Lattice space-time code of the highest rank. Proceedings of the American Mathematical Society, 137 (2009), 3601-3607.

  15. On the positive integral solutions of the Diophantine equation x3 + by + 4 – xyz = 0. African Diaspora Journal of Mathematics, 8 (2009), No. 1, 81-89.

  16. (with B. He) On a family of Diophantine triples {k, A2k+2A ,(A+1)2k+2(A+1)} with two parameters. Acta Mathematica Hungarica., 124 (1-2) (2009), 99-113.

  17. (with F. Luca) On the Diophantine equation x2 + 2a 13b = yn. Colloquium Mathematicum, 116 (2009), 139-146.

  18. (with S. Akhtari,  P. G. Walsh) Addendum on the equation aX4 - bY2=2. Acta Arithmetica 137 (2009), 199-202.

  19. (with Bo He) On the family of Diophantine triples {k+1, 4k, 9k+3}, Periodica Mathematica Hungarica, 58 (1) (2009), 59-70.

  20. (with Bo He, G. P. Walsh) On the Diophantine equation X2 – (22m +1)Y4=-22m. Publ. Math. Debrecen, 73/3-4 (2008) 417-420.

  21. (with Bo He) Simultaneous Pellian equations with a single or no solution, Acta Arith. 134 (2008), 369-380.

  22. (with Bo He) On the number of solutions of Goormaghtigh equation for given x and y, Indag. Mathem., N.S., 19 (1) (2008), 65-72.

  23. On the solutions of a parametric family of cubic Thue equations. Bull Braz Math Soc, New Series 39 (4) (2008), 537-554.

  24. (with Florian Luca) On the positive integral solutions of the Diophantine equation x3 + by + 1 - xyz=0. Bull. Malays. Math. Sci. Soc. (2) 31 (2) (2008), 129–134.

  25. (With Florian Luca) On the Diophantine equation x2 + 2a 5b = yn. Int. J. Number Theory, 4, (6) (2008), 973-979.

  26. (with Edray Goins and Florian Luca) On the Diophantine Equation x2 + 2α 5β 13γ = yn. ANTS VIII Proceedings: A.J. van der Poorten and A. Stein (eds.), ANTS VIII, Lecture Notes in Computer Science 5011 (2008), 430-442.

  27. (With Florian Luca) On binary palindromes of the form 10n ± 1. C. R. Acad. Sci. Paris, Ser. I 346 (2008) 487–489.

  28. (With Florian Luca) On the numbers of the form ± x2 ± y! Diophantine Equation, Editor: N. Saradha, Narosa Publishing House, (2008), pp. 135-149.

  29. (With S. Akhtari, P.G. Walsh) On the equation aX4 - bY2 = 2.. Acta Arith. 131 (2008), 145-169.

  30. (With Fadwa S. Abu Muriefah and Florian Luca) On the Diophantine equation x2 + 5a 13b = yn. The Glasgow Mathematical Journal, Volume 50, Issue 01, January 2008, pp 175-181.

  31. (With Florian Luca) On the Diophantine equation x2 + 72k = yn.  The Fibonacci Quarterly Vol. 54.4 (2007) 322-326.

  32. (with Edray Goins) On Pythagorean Quadruplets. International Journal of Pure and Applied Mathematics, Volume 35, No. 3 (2007), 363-372.

  33. A parametric family of sextic Thue equations. Acta Arith. 125 (2006), 347-361.

  34. A Note on the Diophantine Equation x! + A = y2II. International Journal of Applied Mathematics & Statistics, Vol. 6, No. D06 (2006), 25-32.

  35. Complete Solutions of a Family of Cubic Thue Equations, Journal de Theorie des Nombres de Bordeaux 18 (2006), 285-298. 

  36. (With M. Bennett, G. P. Walsh) A generalization of a theorem of Bumby on quartic Diophantine equations. International Journal of Number Theory, Vol. 2, No. 2 (June 2006) 195-206.

  37. A Note on the Diophantine Equation x2 + D = pn , RJooiA, Transactions on Mathematics, Spring 2006, pp. 125-129.

  38. On the solutions of a family of quartic Thue equations II. C. R. Math. Rep. Acad. Sci. Canada Vol. 28. (1), 2006 pp. 24-32.

  39. A Note on the Diophantine Equation x! + A = y2. International Journal of Pure and Applied Mathematics, Volume 26, No. 4 (2006), 565-571.

  40. (With P. M. Voutier, G. P. Walsh) Solving a family of Thue equations with an application to the equation x2 – Dy4 = 1. Acta Arithmetica 120 (2005), 39-5

  41. (With C. Heuberger and V. Ziegler) Automatic solution of families of Thue equations and an example degree 8, J. Symbolic Computation 38 (2004), Issue 3, 1145-1163.

  42. A Parametric Family of Cubic Thue Equations, J. Number Theory 107 (2004), 63-79.

  43. On the solutions of a family of sextic equations, Number Theory for the Millennial, Bruce Berndt, et. al., editors, A.K. Peters Ltd, 2002, Volume III, 285-299.

  44. On the solutions of a family of quartic equations, Math. Comp. 69 (2000), 839-849.

  45. On binary quadratic forms, Proceedings of the 11th Conference of ACMS, 1997, 125-135.

Membership:

AMS

MAA

CMS

ACMS
 


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