[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/rodica-simion-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/rodica-simion-wikipedia\/","headline":"Rodica Simion – Wikipedia","name":"Rodica Simion – Wikipedia","description":"before-content-x4 From Wikipedia, the free encyclopedia after-content-x4 Romanian-American mathematician Rodica Eugenia Simion (January 18, 1955 \u2013 January 7, 2000) was","datePublished":"2019-09-17","dateModified":"2019-09-17","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.wikimedia.org\/static\/images\/wmf-logo.png","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-logo.png","height":"101","width":"135"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/rodica-simion-wikipedia\/","about":["Wiki"],"wordCount":3179,"articleBody":"     (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4From Wikipedia, the free encyclopedia       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Romanian-American mathematicianRodica Eugenia Simion (January 18, 1955 \u2013 January 7, 2000) was a Romanian-American mathematician.  She was the Columbian School Professor of Mathematics at George Washington University. Her research concerned combinatorics: she was a pioneer in the study of permutation patterns, and an expert on noncrossing partitions.       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Table of ContentsBiography[edit]Recognition[edit]Research contributions[edit]Other activities[edit]Selected publications[edit]See also[edit]References[edit]Biography[edit]Simion was one of the top competitors in the Romanian national mathematical olympiads.[1] She graduated from the University of Bucharest in 1974, and immigrated to the United States in 1976.[2] She did her graduate studies at the University of Pennsylvania, earning a Ph.D. in 1981 under the supervision of Herbert Wilf.[2][3] After teaching at Southern Illinois University and Bryn Mawr College, she moved to George Washington University in 1987, and became Columbian School Professor in 1997.[2]Recognition[edit]She is included in a deck of playing cards featuring notable women mathematicians published by the Association of Women in Mathematics.[4]       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Research contributions[edit]Simion’s thesis research concerned the concavity and unimodality of certain combinatorially defined sequences,[5] and included what Richard P. Stanley calls “a very influential result” that the zeros of certain polynomials are all real.[2]Next, with Frank Schmidt, she was one of the first to study the combinatorics of sets of permutations defined by forbidden patterns; she found a bijective proof that the stack-sortable permutations and the permutations formed by interleaving two monotonic sequences are equinumerous, and found combinatorial enumerations of many permutation classes.[2][5] The “simsun permutations” were named after her and Sheila Sundaram, after their initial studies of these objects;[6][7] a simsun permutation is a permutation in which, for all k, the subsequence of the smallest k elements has no three consecutive elements in decreasing order.[8]Simion also did extensive research on noncrossing partitions, and became “perhaps the world’s leading authority” on them.[2]Other activities[edit]Simion was the main organizer of an exhibit about mathematics, Beyond Numbers, at the Maryland Science Center, based in part on her earlier experience organizing a similar exhibit at George Washington University.[2][9] She was also a leader in George Washington University’s annual Summer Program for Women in Mathematics.[2]As well as being a mathematician, Simion was a poet and painter;[6][10] her poem “Immigrant Complex” was published in a collection of mathematical poetry in 1979.[11]Selected publications[edit]Simion, Rodica (1984), “A multi-indexed Sturm sequence of polynomials and unimodality of certain combinatorial sequences”, Journal of Combinatorial Theory, Series A, 36 (1): 15\u201322, doi:10.1016\/0097-3165(84)90075-X, MR\u00a00728500.Simion, Rodica; Schmidt, Frank W. (1985), “Restricted permutations”, European Journal of Combinatorics, 6 (4): 383\u2013406, doi:10.1016\/s0195-6698(85)80052-4, MR\u00a00829358.Simion, Rodica; Ullman, Daniel (1991), “On the structure of the lattice of noncrossing partitions”, Discrete Mathematics, 98 (3): 193\u2013206, doi:10.1016\/0012-365X(91)90376-D, MR\u00a01144402.Simion, Rodica (2000), “Noncrossing partitions”, Discrete Mathematics, 217 (1\u20133): 367\u2013409, doi:10.1016\/S0012-365X(99)00273-3, MR\u00a01766277.See also[edit]References[edit]^ Crapanzano, Theresa (January 20, 2000), “GW mourns after math professor passes away”, The GW Hatchet.^ a b c d e f g h Stanley, Richard P. (2000), “Rodica Simion: January 18, 1955 \u2013 January 7, 2000” (PDF), Pi Mu Epsilon Journal, 11: 83\u201386.^ Rodica Simion at the Mathematics Genealogy Project^ “Mathematicians of EvenQuads Deck 1”, awm-math.org, retrieved 2022-06-18{{citation}}:  CS1 maint: url-status (link)^ a b Wilf, Herbert (January 2000), Rodica Simion (1955\u20132000), Remarks at a special session of an AMS meeting in Washington, D.C..^ a b Zeilberger, Doron (January 2000), RODICA SIMION (1955-2000): An (almost) Perfect Enumerator and Human Being.^ Sundaram, Sheila (2002), “Reminiscences of Rodica Simion”, Advances in Applied Mathematics, 28 (3\u20134): 285\u2013286, doi:10.1006\/aama.2001.0785, MR\u00a01899997.^ Deutsch, Emeric; Elizalde, Sergi (2012), “Restricted simsun permutations”, Annals of Combinatorics, 16 (2): 253\u2013269, arXiv:0912.1361, doi:10.1007\/s00026-012-0129-6, MR\u00a02927606, S2CID\u00a0115172092.^ Bonin, Joseph E. (2002), “A remembrance of Rodica Simion”, Advances in Applied Mathematics, 28 (3\u20134): 280\u2013281, doi:10.1006\/aama.2001.0783, MR\u00a01899995.^ Kalai, Gil (January 7, 2000), Rodica Simion: Immigrant Complex, Combinatorics and more.^ Robson, Ernest M.; Wimp, Jet, eds. (1979), Against infinity: an anthology of contemporary mathematical poetry, Primary Press, pp.\u00a065\u201366, ISBN\u00a09780934982016.Wikimedia ErrorOur servers are currently under maintenance or experiencing a technical problem.Please try again in a few\u00a0minutes.See the error message at the bottom of this page for more\u00a0information.      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