IPM Positions

Senior Associate Researcher, School of Mathematics (2019 - 2020 (till March 19, 2020, Resident in Isfahan))

Past IPM Positions

Resident Researcher, School of Mathematics (2012 - 2013) (Resident in Isfahan ) Non Resident Researcher (non-resident), School of Mathematics (2008 - 2012) Student Researcher, School of Mathematics (2001 - 2006)

Non IPM Affiliations

Associate Professor of Isfahan University of Technology

Research Interests

Combinatorial Designs

Present Research Project at IPM

Disjoint Designs

Related Papers

1.	A. Khamseh and G. R. Omidi Large stars with few colors Math. Reports 24 (2022), 363-375  [abstract]

2.	G. R. Omidi and M. Shahsiah (Joint with M. Miralaei) Size Ramsey numbers of stars versus cliques J. Graph Theory 92 (2019), 275-286  [abstract]

3.	G. R. Omidi (Joint with R. Javadi, F. Khoeini, and A. Pokrovskiy) On the size-Ramsey number of cycles Combin. Probab. Comput. 28 (2019), 871-880  [abstract]

4.	G. R. Omidi (Joint with E. R. van Dam) Directed strongly walk-regular graphs J. Algebraic Combin. (Publishied) [abstract]

5.	G.R. Omidi On a Question of Erdos and Faudree on the size Ramsey Numbers SIAM J. Discrete Math. (Accepted) [abstract]

6.	G. R. Omidi and G. Raeisi (Joint with Z. Rahimi) Stars versus stripes Ramsey numbers European J. Combin. 67 (2018), 268-274  [abstract]

7.	R. Javadi and G. R. Omidi (Joint with A. Khodadadpour) Decomposition of complete uniform multi-hypergraphs into Berge paths and cycles J. Graph Theory (2017), Doi: 1002/jgt.222226  [abstract]

8.	G. R. Omidi and M. Shahsiah Ramsey numbers of 4-uniform loose cycles Discrete Appl. Math. 230 (2017), 112-120  [abstract]

9.	G.R. Omidi and M. Shahsiah Diagonal Ramsey numbers of loose cycles in uniform hypergraphs SIAM J. Discrete Math. 31 (2017), 1634-1669  [abstract]

10.	G. R. Omidi (Joint with L. Maherani) Monochromatic Hamiltonian Berge-cycles in colored hypergraphs Discrete Math. 34 (2017), 2043-2052  [abstract]

11.	G. R. Omidi and M. Shahsiah Ramsey numbers of uniform loose path and cycles Discrete Math. 340 (2017), 1426-1434  [abstract]

12.	A . Khamseh and G. R. Omidi A generalization of Ramsey theory for stars and one matching Math. Reports 19 (2017), 85-92  [abstract]

13.	G. R. Omidi A spectral excess theorem for normal digraphs J. Algebraic Combin. 42 (2015), 537-554  [abstract]

14.	G. R. Omidi and G. Raeisi (Joint with L. Maherani and M. Shahsiah) On three-color Ramsey number of paths Graphs Combin. 31 (2015), 2299-2308  [abstract]

15.	G.R. Omidi (joint with M. Shahsiah) Ramsey numbers of 3-uniform loose paths and loose cycles J. Combin. Theory Ser. A (Accepted) [abstract]

16.	G. R. Omidi (Joint with H. Chuang, H.-J. Lai, K. Wang, and N. Zakeri) On group choosability of graphs, II Graphs Combin. (Accepted) [abstract]

17.	G. R. Omidi and Gh. Raeisi (Joint with L. Maherani and M. Shahsiah) The Ramsey number of loose paths in 3-uniform hypergraphs Electron. J. Combin. 20 (2013), #12  [abstract]

18.	G.R. Omidi (Joint with E. R. van Dam) Strongly walk-regular graphs J. Combin. Theory Ser. A 120 (2013), 803-810  [abstract]

19.	F. Ashraf, G. R. Omidi and B. Tayfeh-Rezaie On the sum of signless laplacian eigenvalues of a graph Linear Algebra Appl. 438 (2013), 4539-4546  [abstract]

20.	G. R. Omidi (Joint with A. Khamseh) A generalization of Ramsey theory for linear forests Int. J. Comput. Math. (Accepted) [abstract]

21.	G. R. Omidi (Joint with H. J. Lai and Gh. Raeisi) On group choosability of total graphs Graphs Combin. (Accepted) [abstract]

22.	G. R. Omidi (Joint with H. Chuang, H.-J. Lai, and N. Zakeri) On group choosability of graphs, I Ars Combin. (Accepted) [abstract]

23.	G. R. Omidi (Joint with M. Shahsiah) On the choice number of packings J. Combin. Des. (Accepted) [abstract]

24.	G. R. Omidi (Joint with W. H. Haemers) Universal adjacency matrices with two eigenvalues Linear Algebra Appl. (Accepted) [abstract]

25.	G. R. Omidi (Joint with E. R. van Dam) Graphs whose normalized Laplacian has three eignevalues Linear Algebra Appl. (Accepted) [abstract]

26.	G. R. Omidi (Joint with G. Raeisi) On multicolor Ramsey number of paths versus cycles Electron. J. Combin. 18 (2011), #P24  [abstract]

27.	G. R. Omidi (Joint with G. Raeisi) A note on the Ramsey number of stars-complete graphs European J. Combin. 32 (2011), 598-599  [abstract]

28.	G. R. Omidi A note on group choosability of graphs with girth at least 4 Graphs Combin. 27 (2011), 269-273  [abstract]

29.	G. R. Omidi and B. Tayfeh-Rezaie (Joint with F. Ayoobi) A note on graphs whose signless Laplacian has three distinct eigenvalues Linear Multilinear Algebra 59 (2011), 701-706  [abstract]

30.	G. R. Omidi (Joint with E. Vatandoost) On the commuting graph of rings J. Algebra Appl. (Accepted) [abstract]

31.	G. R. Omidi (Joint with E. Vatandoost) Starlike trees with maximum degree 4 are determined by their signless Laplacian spectra ELA 20 (2010), 274-290  [abstract]

32.	G. R. Omidi The characterization of graphs with the largest Laplacian eigenvalue at most [(5+√{13})/2] Ars Combin. 94 (2010), 423-430  [abstract]

33.	G. R. Omidi (Joint with K. Tajbakhsh) The spectral characterization of graphs of index less than 2 with no Zn as a component Ars Combin. 94 (2010), 135-145  [abstract]

34.	G. R. Omidi On integral graphs with few cycles Graphs Combin. (2010), DOI 10.1007/s00373-010-0913-1  [abstract]

35.	G. R. Omidi and B. Tayfeh-Rezaie (Joint with R. Laue) Large sets of t-designs from t-homogeneous groups Ars Combin. 97 (2010), 333-342  [abstract]

36.	G. R. Omidi On graphs with largest Laplacian eigenvalue at most 4 Australas. J. Combin. 44 (2009), 163-170  [abstract]

37.	G. R. omidi On a signless Laplacian spectral characterization of T-shape trees Linear Algebra Appl. 431 (2009), 1607-1615  [abstract]

38.	G. R. Omidi (Joint with H. Chuang) Graphs with three distict eigenvalues and largest eigenvalue less than 8 Linear Algebra Appl. 430 (2009), 2053-2062  [abstract]

39.	G. R. Omidi On the nullity of bipatite graphs Graphs Combin. 25 (2009), 111-114  [abstract]

40.	G. R. Omidi The characterization of graphs with largest Laplacian eigenvalue at most 4 Australas. J. Combin. (Accepted) [abstract]

41.	G. R. Omidi (Joint with K. Tajbakhsh) Starlike trees are determined by their Laplacian spectrum Linear Algebra Appl. 422 (2007), 654-658  [abstract]

42.	G. R. Omidi, M. R. Pournaki and B. Tayfeh-Rezaie 3-Designs with block size 6 from PSL(2,q) and their large sets Discrete Math. 307 (2007), 1580-1588  [abstract]

43.	N. Ghareghani, G. R. Omidi and B. Tayfeh-Rezaie Spectral characterization of graphs with index at most √{2√5} Linear Algebra Appl. 420 (2007), 483-489  [abstract]

44.	G. R. Omidi and B. Tayfeh-Rezaie (Joint with R. Laue and A. Wassermann) New large sets of t-designs with prescribed groups of automorphisms J. Combin. Des. 15 (2007), 210-220  [abstract]

45.	P. J. Cameron, G. R. Omidi and B. Tayfeh-Rezaie 3-designs from PGL(2,q) The Electronic Journal of Combinatorics 13 (2006), #R50  [abstract]

46.	P. J. Cameron, M. R. Maimani, G. R. Omidi and B. Tayfeh-Rezaie 3-Designs from PSL(2, q) Discrete Math. 306 (2006), 3063-3073  [abstract]