Ion Grama

971 total citations
56 papers, 451 citations indexed

About

Ion Grama is a scholar working on Statistics and Probability, Mathematical Physics and Finance. According to data from OpenAlex, Ion Grama has authored 56 papers receiving a total of 451 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Statistics and Probability, 20 papers in Mathematical Physics and 16 papers in Finance. Recurrent topics in Ion Grama's work include Stochastic processes and statistical mechanics (17 papers), Probability and Risk Models (14 papers) and Stochastic processes and financial applications (12 papers). Ion Grama is often cited by papers focused on Stochastic processes and statistical mechanics (17 papers), Probability and Risk Models (14 papers) and Stochastic processes and financial applications (12 papers). Ion Grama collaborates with scholars based in France, China and Germany. Ion Grama's co-authors include Quansheng Liu, Xiequan Fan, Erich Haeusler, Michael Nussbaum, Qiyu Jin, Mounir Mesbah, Émile Le Page, Marc Peigné, Charles Kervrann and Quansheng Liu and has published in prestigious journals such as PLoS ONE, The Annals of Statistics and Journal of Statistical Software.

In The Last Decade

Ion Grama

48 papers receiving 414 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ion Grama France	13	171	132	131	117	60	56	451
Zhongxing Ye China	12	59 0.3×	87 0.7×	91 0.7×	91 0.8×	68 1.1×	43	390
V. Statulevičius Lithuania	9	136 0.8×	146 1.1×	124 0.9×	105 0.9×	70 1.2×	35	513
Quansheng Liu France	18	360 2.1×	701 5.3×	337 2.6×	226 1.9×	157 2.6×	81	943
O. V. Lepskii	4	270 1.6×	63 0.5×	26 0.2×	65 0.6×	99 1.6×	8	446
Wei‐Liem Loh Singapore	12	228 1.3×	49 0.4×	73 0.6×	59 0.5×	115 1.9×	25	487
Michael Nussbaum Germany	10	320 1.9×	39 0.3×	40 0.3×	84 0.7×	125 2.1×	20	482
L. Saulis Lithuania	6	95 0.6×	93 0.7×	96 0.7×	66 0.6×	45 0.8×	37	277
Jacques Dauxois France	8	273 1.6×	36 0.3×	29 0.2×	53 0.5×	97 1.6×	14	423
Miao Bai-qi China	12	282 1.6×	64 0.5×	67 0.5×	122 1.0×	109 1.8×	47	514
Werner Linde Germany	11	135 0.8×	286 2.2×	54 0.4×	285 2.4×	67 1.1×	43	659

Countries citing papers authored by Ion Grama

Since Specialization

Citations

This map shows the geographic impact of Ion Grama's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ion Grama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ion Grama more than expected).

Fields of papers citing papers by Ion Grama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ion Grama. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ion Grama. The network helps show where Ion Grama may publish in the future.

Co-authorship network of co-authors of Ion Grama

This figure shows the co-authorship network connecting the top 25 collaborators of Ion Grama. A scholar is included among the top collaborators of Ion Grama based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ion Grama. Ion Grama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Grama, Ion, et al.. (2025). Edgeworth Expansion and Large Deviations for the Coefficients of Products of Positive Random Matrices. Journal of Theoretical Probability. 38(2).

Grama, Ion, et al.. (2025). Conditioned local limit theorems for random walks on the real line. Annales de l Institut Henri Poincaré Probabilités et Statistiques. 61(1). 1 indexed citations

Grama, Ion, et al.. (2023). Large deviation expansions for the coefficients of random walks on the general linear group. The Annals of Probability. 51(4). 2 indexed citations

Grama, Ion, et al.. (2022). Moderate deviations and local limit theorems for the coefficients of random walks on the general linear group. Stochastic Processes and their Applications. 158. 103–133. 2 indexed citations

Grama, Ion, et al.. (2022). Limit theorems for critical branching processes in a finite-state-space Markovian environment. Advances in Applied Probability. 54(1). 111–140.

Grama, Ion, et al.. (2021). Berry–Esseen bounds and moderate deviations for random walks on G L d ( R ) . Stochastic Processes and their Applications. 142. 293–318. 3 indexed citations

Grama, Ion, et al.. (2021). Berry–Esseen bound and precise moderate deviations for products of random matrices. Journal of the European Mathematical Society. 24(8). 2691–2750. 9 indexed citations

Jin, Qiyu, Ion Grama, & Quansheng Liu. (2017). Optimal Weights Mixed Filter for removing mixture of Gaussian and impulse noises. PLoS ONE. 12(7). e0179051–e0179051. 5 indexed citations

Jin, Qiyu, Ion Grama, Charles Kervrann, & Quansheng Liu. (2017). Nonlocal Means and Optimal Weights for Noise Removal. SIAM Journal on Imaging Sciences. 10(4). 1878–1920. 27 indexed citations

10.

Durrieu, Gilles, et al.. (2016). Dynamic extreme values modeling and monitoring by means of sea shores water quality biomarkers and valvometry. Environmental Monitoring and Assessment. 188(7). 401–401. 9 indexed citations

11.

Fan, Xiequan, Ion Grama, & Quansheng Liu. (2016). Deviation inequalities for martingales with applications. Journal of Mathematical Analysis and Applications. 448(1). 538–566. 9 indexed citations

12.

Grama, Ion, et al.. (2016). Berry–Esseen’s bound and Cramér’s large deviation expansion for a supercritical branching process in a random environment. Stochastic Processes and their Applications. 127(4). 1255–1281. 18 indexed citations

13.

Grama, Ion, Émile Le Page, & Marc Peigné. (2016). Conditioned limit theorems for products of random matrices. Probability Theory and Related Fields. 168(3-4). 601–639. 15 indexed citations

14.

Fan, Xiequan, Ion Grama, & Quansheng Liu. (2013). Sharp large deviations under Bernsteinʼs condition. Comptes Rendus Mathématique. 351(21-22). 845–848. 2 indexed citations

15.

Fan, Xiequan, Ion Grama, & Quansheng Liu. (2013). Cramér large deviation expansions for martingales under Bernstein’s condition. Stochastic Processes and their Applications. 123(11). 3919–3942. 15 indexed citations

16.

Fan, Xiequan, Ion Grama, & Quansheng Liu. (2012). About the constant in Talagrand's inequality for sums of bounded random variables. arXiv (Cornell University). 1 indexed citations

17.

Fan, Xiequan, Ion Grama, & Quansheng Liu. (2012). Hoeffding’s inequality for supermartingales. Stochastic Processes and their Applications. 122(10). 3545–3559. 32 indexed citations

18.

Fan, Xiequan, Ion Grama, & Quansheng Liu. (2012). The missing factor in Bennett's inequality. arXiv (Cornell University). 19(5). 972–7. 1 indexed citations

19.

Dupuy, Jean‐François, Ion Grama, & Mounir Mesbah. (2003). Normalité asymptotique des estimateurs semiparamétriques dans le modèle de Cox avec covariable manquante nonignorable. Comptes Rendus Mathématique. 336(1). 81–84. 2 indexed citations

20.

Grama, Ion & Erich Haeusler. (2000). Large deviations for martingales via Cramér's method. Stochastic Processes and their Applications. 85(2). 279–293. 29 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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