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IPM
30
YEARS OLD

“Gholamreza B. Khosrovshahi”

Tel:  (+98)(21)2290928
Fax:  (+98)(21)2290648
Email: 

IPM Positions

Head, Information Center
Member, Scientific Council, School of Computer Science
(1996 - Present )

Member of Scientific Council of IPM
(1989 - Present)
Founding Fellow and Senior Scientist of IPM

Past IPM Positions

Head, School of Mathematics
(1996 - 2006)

Non IPM Affiliations

Professor of University of Tehran (Retired)
member of, American Mathematics Society, Iranian Mathematical Society, Mathematical Association of America, Institute for Combinatorics and Applications

Research Interests

Combinatorial Design Theory, Coding Theory, and Graph Theory

Awards

1. Iranian Ministry of Higher Education Fellowship (1977-78)
2. Distinguished Researcher, University of Tehran (1991-92)
3. Winner of Kharazmi International Award in Fundamental Research (2000)
4. Distinguished Professor of the Country (2005)

Research Activities

I work in a branch of Combinatorics called Combinatorical designs, in general, and in particular, I emphasis Computational approach in constructing designs of different sort. Large sets and classification of t-designs are of my main concern these days.

Present Research Project at IPM

Combinatorical Designs, t-designs

Related Papers

1. N. Ghareghani and G. B. Khosrovshahi
Minimum cycle basis of direct product of K2×Kn
Linear Algebra Appl. 458 (2014), 671-678  [abstract]
   
2. G. B. Khosrovshahi (Joint with M. H. Ahmadi, N. Akhlaghinia, and Ch. Maysoori)
On the inclusion matrix W23 (v)
Linear Algebra Appl. (Accepted) [abstract]
   
3. G. B. Khosrovshahi (Joint with M.H. Ahmadi, N. Akhlaghinia, and Ch. Maysoori)
More on the Wilson Wtk(v) matrices
Electron. J. Combin. 21 (2014), #P2.53  [abstract]
   
4. S. Akbari, G.B. Khosrovshahi and A. Mofidi
Nowhere-zero 6-flows: A linear algebraic approach
Bull. Inst. Combin. Appl. (Accepted) [abstract]
   
5. E. Ghorbani and G. B. Khosrovshahi (Joint with M. R. Faghihi and S. Tat)
On optimality of designs with three distinct eigenvalues
Electron. J. Combin. 20 (2013), # P16  [abstract]
   
6. S. Akbari, N. Ghareghani, G. B. Khosrovshahi and S. Zare
A note on zero-sum 5-flows in regular graphs
Electron. J. Combin. 19 (2012), #P7  [abstract]
   
7. E. Ghorbani and G. B. Khosrovshahi
Simple signed Steiner triple systems
J. Combin. Des. (2012), DOI: 10.1002/jcd.21297  [abstract]
   
8. S. Akbari, G. B. Khosrovshahi and A. Mofidi
Zero-sum flows in designs
J. Combin. Des. 19 (2011), 355-364  [abstract]
   
9. S. Akbari, N. Ghareghani and G. B. Khosrovshahi (Joint with A. Mahmoody)
On zero-sum 6-flows of graphs
Linear Algebra Appl. 430 (2009), 3047-3052  [abstract]
   
10. G. B.. Khosrovshahi and B. Tayfeh-Rezaie
Trades and t-designs
London Math. Soc. Lecture Note Ser. ( In: Surveys in combinatorics 2009)
[abstract]
   
11. G. B. Khosrovshahi and B. Tayfeh-Rezaie
Classification of simple 2-(11,3,3) designs
Discrete Math. 309 (2009), 515-520  [abstract]
   
12. E. Ghorbani, G. B. Khosrovshahi, Ch. Maysoori and M. Mohammad-Noori
Inclusion matrices and chains
J. Combin. Theory Ser. A 115 (2008), 878-887  [abstract]
   
13. M. Behbahani, G. B. Khosrovshahi and B. Tayfeh
On the spectrum of simple T(2, 3, v) trades
J. Statist. Plann. Inference 138 (2008), 2236-2242  [abstract]
   
14. G. B. Khosrovshahi (Joint with R. Laue)
t-designs with t ≥ 3
 (In Handbooks) [abstract]
   
15. G. B. Khosrovshahi (Joint with A. S. Hedayat)
Trades
 (In Handbooks) [abstract]
   
16. S. Akbari, A. Alipour, E. Ghorbani and G. B. Khosrovshahi
{−1,0,1}-basis for the null space of a forest
Linear Algebra Appl. 414 (2006), 506-511  [abstract]
   
17. S. Akbari, N. Ghareghani, G. B. Khosrovshahi and H. R. Maimani
The kernels of the incidence matrices of graphs revisited
Linear Algebra Appl. 414 (2006), 617-625  [abstract]
   
18. G. B. Khosrovshahi and B. Tayfeh-Rezaie
Large sets of t-designs through partitionable sets: A survey
Discrete Math. 306 (2006), 2993-3004  [abstract]
   
19. G. B. Khosrovshahi, R. Laue and B. Tayfeh-Rezaie
On large sets of t-designs of size four
Bayreuth. Math. Schr. 74 (2005), 136-144  [abstract]
   
20. A. Hoorfar and G. B. Khosrovshahi
On the nonexistence of Steiner t-(v,k) trades
Ars Combin. 75 (2005), 195--204  [abstract]
   
21. M. Mohammad-Noori, Z. Eslami and G. B. Khosrovshahi
Enumeration of t-designs through intersection matrices
Des. Codes Cryptogr. 32 (2004), 185-191  [abstract]
   
22. Z . Eslami, B. Tayfeh-Rezaie, G. B. Khosrovshahi and M. Mohammad-Noori
Some new 4-designs
Ars Combin. 73 (2004), 225-229  [abstract]
   
23. G. B. Khosrovshahi and B. Tayfeh-Rezaie
Some indecomposable t-designs
Des. Codes Cryptogr. 32 (2004), 235-238  [abstract]
   
24. A. Hoorfar and G. B. Khosrovshahi
On the existence of trades of large volumes
Ars Combin. 73 (2004), 45-48  [abstract]
   
25. G. B. Khosrovshahi and B. Tayfeh-Rezaie
Some results on the existence of large sets of t-designs
J. Combin. Des. 11 (2003), 144-151  [abstract]
   
26. G. B. Khosrovshahi and B. Tayfeh-Rezaie
Root cases of large sets of t-designs
Discrete Math. 263 (2003), 143-155  [abstract]
   
27. H. Kharaghani, F. Kamali and G. B. Khosrovshahi
Some Bush-type Hadamard matrices
J. Statist. Plann. Inference 113 (2003), 375-384  [abstract]
   
28. M. Emamy, G. B. Khosrovshahi and Ch. Maysoori
Some designs of small orders and their codes
J. Combin. Math. Combin. Comput. 43 (2003), 101-117  [abstract]
   
29. G. B. Khosrovshahi, M. Mohammad-Noori and B. Tayfeh-Rezaie
Classification of 6-(14,7,4) designs with nontrivial automorphism groups
J. Combin. Des. 10 (2002), 180-194  [abstract]
   
30. S. Akbari and G. B. Khosrovshahi
On the smallest edge defining sets of graphs
Ars Combin. 63 (2002), 293-303  [abstract]
   
31. G. B. Khosrovshahi, Ch. Maysoori and B. Tayfeh-Rezaie
A note on 3-factorizations of K10
J. Combin. Des. 9 (2001), 379-383  [abstract]
   
32. Z. Eslami and G. B. Khosrovshahi
Some new 6-(14,7,4) designs
J. Combin. Theory Ser. A 93 (2001), 141-152  [abstract]
   
33. Z. Eslami, G. B. Khosrovshahi and B. Tayfeh-Rezaie
On classification of 2-(8,3) and 2-(9,3) trades
J. Combin. Math. Combin. Comput. 38 (2001), 231-242  [abstract]
   
34. G. B. Khosrovshahi and B. Tayfeh-Rezaie
A new proof of a classical theorem in design theory
J. Combin. Theory Ser. A 93 (2001), 391-396  [abstract]
   
35. G. B. Khosrovshahi, R. Naserasr and B. Tayfeh-Rezaie
Ternary trades and their codes
J. Statist. Plann. Inference 95 (2001), 237-243  [abstract]
   
36. G. B. Khosrovshahi, H. R. Maimani and R. Torabi
An automorphism-free 4-(15,5,5) design
J. Combin. Math. Combin. Comput. 37 (2001), 187-192  [abstract]
   
37. Z. Eslami and G. B. Khosrovshahi
Classification of some large sets and designs
J. Geom. 67 (2000), 105-110  [abstract]
   
38. Z. Eslami and G. B. Khosrovshahi
A complete classification of 3-(11,4,4) designs with nontrivial automorphism group
J. Combin. Des. 8 (2000), 419-425  [abstract]
   
39. Z. Eslami, G. B. Khosrovshahi and B. Tayfeh-Rezaie
On halvings of the 2-(10,3,8) design
J. Statist. Plann. Inference 86 (2000), 411-419  [abstract]
   
40. G. B. Khosrovshahi and R. Torabi
Maximal trades
Ars Combin. 51 (1999), 211-223  [abstract]
   
41. R. Naserasr and G. B. Khosrovshahi
Hypergraphical codes arising from binary trades
Des. Codes Cryptogr. 18 (1999), 183-186  [abstract]
   
42. G. B. Khosrovshahi and Ch. Maysoori
On the structure of higher incidence matrices
Bull. Inst. Combin. Appl. 25 (1999), 13-22  [abstract]
   
43. G. B. Khosrovshahi, H. R. Maimani and R. Torabi
On trades: an update
Discrete Appl. Math. 95 (1999), 361-376  [abstract]
   
44. G. B. Khosrovshahi, H. R. Maimani and R. Torabi
Classification of simple 2-(6,3) and 2-(7,3) trades
Australas. J. Combin. 19 (1999), 55-72  [abstract]
   
45. G. B. Khosrovshahi and H. R. Maimani
On 2-(v,3) Steiner trades of small volumes
Ars Combin. 52 (1999), 199-220  [abstract]
   
46. G. B. Khosrovshahi and R. Naserasr
On compressing complete designs
J. Statist. Plann. Inference 74 (1998), 193-201  [abstract]
   
47. G. B. Khosrovshahi and H. Yousefi-Azari
Octahedrals in Steiner quadruple systems
Util. Math. 51 (1997), 33-39  [abstract]
   
48. G. B. Khosrovshahi and N. M. Singhi
Further characterization of basic trades
J. Statist. Plann. Inference 58 (1997), 87-92  [abstract]
   
49. G. B. Khosrovshahi, A. Nowzari-Dalini and R. Torabi
Trading signed designs and some new 4-(12,5,4) designs
Des. Codes Cryptogr. 11 (1997), 279-288  [abstract]
   
50. G. B. Khosrovshahi and H. R. Maimani
Smallest defining sets for 2-(10,5,3) designs
Australas. J. Combin. 15 (1997), 31-35  [abstract]
   
51. S. Shahriari, S. Akbari, G. B. Khosrovshahi and Ch. Maysoori
On maximum size anti-Pasch sets of triples
London Math. Soc. Lecture Note Ser. (1997), 7-14  [abstract]
   
52. G. B. Khosrovshahi and H. Yousefi-Azari
Construction of some cyclic anti-Pasch Steiner triple systems of small orders
J. Combin. Inform. System Sci. 21 (1996), 1-4  [abstract]
   
53. B. Kalantari and G. B. Khosrovshahi
Magic labeling in graphs: bounds complexity and an application to a variant of TSP
Networks 28 (1996), 211-219  [abstract]
   
54. A. Shokoufandeh, S. Ajoodani-Namini and G. B. Khosrovshahi
Intersections of triple systems: small orders
J. Combin. Math. Combin. Comput. 20 (1996), 33-52  [abstract]
   
55. G. B. Khosrovshahi
Problem 226(BCC12). Non-crossing queens
Discrete Math.( In: Research problems)
[abstract]
   
56. R. Torabi and G. B. Khosrovshahi
A note on labelings of graphs
Linear Multilinear Algebra 39 (1995), 165-169  [abstract]
   
57. G. B. Khosrovshahi, A. Nowzari-Dalini and R. Torabi
Some simple and automorphism-free 2-(15,5,4) designs
J. Combin. Des. 3 (1995), 285-292  [abstract]
   
58. G. B. Khosrovshahi and Ch. Maysoori
On the bases for trades
Linear Algebra Appl. 226-228 (1995), 731-748  [abstract]
   
59. S. Ajoodani-Namini and G. B. Khosrovshahi
On a conjecture of A. Hartman
( In: Combinatorics Advances)
[abstract]
   
60. G. B. Khosrovshahi and S. Ajoodani-Namini
More on halving the complete designs
Discrete Math. 135 (1994), 29-37  [abstract]
   
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