Gérard Letac

1.3k total citations
73 papers, 732 citations indexed

About

Gérard Letac is a scholar working on Artificial Intelligence, Statistics and Probability and Mathematical Physics. According to data from OpenAlex, Gérard Letac has authored 73 papers receiving a total of 732 indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Artificial Intelligence, 28 papers in Statistics and Probability and 21 papers in Mathematical Physics. Recurrent topics in Gérard Letac's work include Bayesian Methods and Mixture Models (29 papers), Statistical Distribution Estimation and Applications (10 papers) and Stochastic processes and statistical mechanics (10 papers). Gérard Letac is often cited by papers focused on Bayesian Methods and Mixture Models (29 papers), Statistical Distribution Estimation and Applications (10 papers) and Stochastic processes and statistical mechanics (10 papers). Gérard Letac collaborates with scholars based in France, Canada and United States. Gérard Letac's co-authors include Hélène Massam, Jacek Wesołowski, Shaul K. Bar‐Lev, V. Seshadri, Daoud Bshouty, Donald Richards, Peter Enis, Mauro Piccioni, Piotr Graczyk and A. Ferrari and has published in prestigious journals such as Journal of the American Statistical Association, Journal of the Royal Statistical Society Series B (Statistical Methodology) and The Annals of Statistics.

In The Last Decade

Gérard Letac

65 papers receiving 657 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Gérard Letac France 13 413 250 184 177 106 73 732
Abram Kagan United States 10 369 0.9× 200 0.8× 110 0.6× 133 0.8× 108 1.0× 61 776
V. Bentkus Lithuania 16 438 1.1× 188 0.8× 193 1.0× 309 1.7× 186 1.8× 74 978
Michel Ledoux France 3 277 0.7× 177 0.7× 206 1.1× 304 1.7× 231 2.2× 5 900
Włodzimierz Bryc United States 18 472 1.1× 192 0.8× 197 1.1× 368 2.1× 221 2.1× 55 965
Christian Houdré United States 16 257 0.6× 102 0.4× 312 1.7× 226 1.3× 236 2.2× 86 839
Hélène Massam Canada 16 384 0.9× 267 1.1× 94 0.5× 62 0.4× 47 0.4× 50 696
Iosif Pinelis United States 16 219 0.5× 128 0.5× 344 1.9× 170 1.0× 87 0.8× 66 796
Tiefeng Jiang United States 16 797 1.9× 294 1.2× 126 0.7× 415 2.3× 79 0.7× 46 1.1k
Louis H. Y. Chen Singapore 14 805 1.9× 299 1.2× 316 1.7× 446 2.5× 150 1.4× 27 1.3k
А. Н. Тихомиров Russia 12 363 0.9× 85 0.3× 79 0.4× 258 1.5× 51 0.5× 42 512

Countries citing papers authored by Gérard Letac

Since Specialization
Citations

This map shows the geographic impact of Gérard Letac'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 Gérard Letac with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Gérard Letac more than expected).

Fields of papers citing papers by Gérard Letac

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Gérard Letac. 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 Gérard Letac. The network helps show where Gérard Letac may publish in the future.

Co-authorship network of co-authors of Gérard Letac

This figure shows the co-authorship network connecting the top 25 collaborators of Gérard Letac. A scholar is included among the top collaborators of Gérard Letac 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 Gérard Letac. Gérard Letac is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Letac, Gérard & Hélène Massam. (2017). The Laplace transform (dets)−pexptr(s−1w) and the existence of non-central Wishart distributions. Journal of Multivariate Analysis. 163. 96–110. 2 indexed citations
2.
Letac, Gérard, et al.. (2017). The ratio of normalizing constants for Bayesian graphical Gaussian model selection. arXiv (Cornell University). 2 indexed citations
3.
Bar‐Lev, Shaul K., Onno Boxma, & Gérard Letac. (2010). A Characterization Related to the Equilibrium Distribution Associated with a Polynomial Structure. Journal of Applied Probability. 47(1). 293–299.
4.
Bar‐Lev, Shaul K., Onno Boxma, & Gérard Letac. (2010). A Characterization Related to the Equilibrium Distribution Associated with a Polynomial Structure. Journal of Applied Probability. 47(1). 293–299.
5.
Letac, Gérard & Hélène Massam. (2008). The noncentral Wishart as an exponential family, and its moments. Journal of Multivariate Analysis. 99(7). 1393–1417. 20 indexed citations
6.
Joffe, A. & Gérard Letac. (2006). Multitype linear fractional branching processes. Journal of Applied Probability. 43(4). 1091–1106. 3 indexed citations
7.
Joffe, A. & Gérard Letac. (2006). Multitype linear fractional branching processes. Journal of Applied Probability. 43(4). 1091–1106. 1 indexed citations
8.
Ferrari, A., Gérard Letac, & Jean‐Yves Tourneret. (2006). Exponential families of mixed Poisson distributions. Journal of Multivariate Analysis. 98(6). 1283–1292. 5 indexed citations
9.
Letac, Gérard & Hélène Massam. (2006). Extremal rays and duals for cones of positive definite matrices with prescribed zeros. Linear Algebra and its Applications. 418(2-3). 737–750. 1 indexed citations
10.
Ferrari, A., et al.. (2005). The noncentral wishart distribution: properties and application to speckle imaging. 924–929. 12 indexed citations
11.
Letac, Gérard & V. Seshadri. (2005). Exponential stopping and drifted stable processes. Statistics & Probability Letters. 72(2). 137–143. 6 indexed citations
12.
Letac, Gérard, Dhafer Malouche, & Stefan Maurer. (2002). The real powers of the convolution of a negative binomial distribution and a Bernoulli distribution. Proceedings of the American Mathematical Society. 130(7). 2107–2114. 10 indexed citations
13.
Letac, Gérard, Hélène Massam, & Donald Richards. (2001). An Expectation Formula for the Multivariate Dirichlet Distribution. Journal of Multivariate Analysis. 77(1). 117–137. 9 indexed citations
14.
Letac, Gérard, et al.. (1996). The Lukacs-Olkin-Rubin characterization of Wishart distributions on symmetric cones. The Annals of Statistics. 24(2). 54 indexed citations
15.
Letac, Gérard. (1982). Les fonctions sphériques d'un couple de Gelfand symétrique et les chaînes de Markov. Advances in Applied Probability. 14(2). 272–294. 2 indexed citations
16.
Letac, Gérard. (1978). Chaînes de Markov sur les permutations. Presses de l’Université de Montréal eBooks. 4 indexed citations
17.
Letac, Gérard. (1977). Which functions preserve Cauchy laws?. Proceedings of the American Mathematical Society. 67(2). 277–286. 22 indexed citations
18.
Letac, Gérard. (1977). Which Functions Preserve Cauchy Laws?. Proceedings of the American Mathematical Society. 67(2). 277–277. 8 indexed citations
19.
Letac, Gérard. (1974). Transience and recurrence of an interesting Markov chain. Journal of Applied Probability. 11(4). 818–824. 13 indexed citations
20.
Letac, Gérard. (1972). Groupe de Stam d'une probabilité. French digital mathematics library (Numdam). 8(2). 175–181. 1 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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