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((short description|Brazilian mathematician))
((More citations needed|date=February 2020))
(( Infobox scientist
| name              = Welington de Melo
| image             = Welington de Melo.jpg
| image_size        = 250px
| caption           = Melo in 1973
| birth_date        = ((birth date|1946|11|17|df=y))
| birth_place       = [[Guapé]], [[Minas Gerais]]
| death_date        = ((death date and age|2016|12|21|1946|11|17|df=y))
| death_place       = 
| nationality       = [[Brazil]]ian
| fields            = [[Mathematics]]
| workplaces        = [[Instituto Nacional de Matemática Pura e Aplicada]] <small>(1974–2016)</small>
| alma_mater        = Instituto Nacional de Matemática Pura e Aplicada
| thesis_title      = Structural Stability of Diffeomorphisms on Two-Manifolds
| thesis_year       = 1973
| doctoral_advisor  = [[Jacob Palis]]
| doctoral_students = [[Artur Avila]]
| known_for         = Contributions to [[dynamical systems theory]]
| awards            = 
))
'''Welington Celso de Melo ''' (17 November 1946 – 21 December 2016) was a Brazilian [[mathematician]]. Known for his contributions to [[dynamical systems theory]], he served as full professor at [[Instituto Nacional de Matemática Pura e Aplicada]] from 1980 to 2016. Melo wrote numerous papers, one being a complete description of the topological behavior of 1-dimensional real dynamical systems (co-authored with Marco Martens and Sebastian van Strien).<ref>((Citation |last1=Martens |first1=M. |last2=De Melo |first2=W. |last3=Van Strien |first3=S. |year=1992 |title=Julia-Fatou-Sullivan theory for real one-dimensional dynamics |journal=Acta Mathematica |volume=168 |issue=1 |pages=273–318 |doi=10.1007/BF02392981 |doi-access=free )).</ref>
He proved the global hyperbolicity of renormalization for ((math|C))<sup>''r''</sup> unimodal maps (co-authored with [[Alberto Pinto (mathematician)|Alberto Pinto]] and  Edson de Faria).<ref>((Citation |last1=Faria |first1=E. |last2=De Melo |first2=W. |last3=Pinto |first3=A. |year=2006|title=Global hyperbolicity of renormalization for Cr unimodal maps |journal=Annals of Mathematics|volume=164|pages=731–824 |doi=10.4007/annals.2006.164.731|arxiv=math/0702851|s2cid=119144004 )).</ref> He was a recipient of the 2003 [[TWAS Prize]].<ref>((Cite web |url=http://twas.org/opportunities/prizes-and-awards |title=Prizes and Awards |date=2016 |publisher=The World Academy of Sciences))</ref>

==Biography==
Born on November 17, 1946, in [[Guapé|Guapé, Minas Gerais]], Welington studied [[electrical engineering]] at the [[Federal University of Minas Gerais]] (1969). He adopted mathematics after attending a course in the researcher of the [[Elon Lages Lima]] Institute in a colloquium in [[Poços de Caldas|Poços de Caldas, Minas Gerais]]. Invited by Elon to study at [[Instituto Nacional de Matemática Pura e Aplicada]] he moved to Rio de Janeiro with his wife Gilza in 1970, with [[Jacob Palis]] his advisor, where Welington completed his doctorate in two years, with a thesis published in the prestigious [[Inventiones Mathematicae]] in 1972. He did his post-doctorate in mathematics at the [[University of California, Berkeley]] in 1972. He returned two years later to [[Brazil]] to make a career as a researcher at IMPA, where he stayed ever since.<ref name="Prizes and Awards">((Cite web |url=https://noticias.impa.br/auth?doc=2532&site=true |title=Morre Welington de Melo, pesquisador do IMPA que fazia matemática até velejando  |date=2016 |publisher=Instituto Nacional de Matemática Pura e Aplicada))</ref>

Appreciated by different generations of mathematicians, Welington was known and respected for his academic rigor and scientific productivity. Besides mathematics, he was passionate about sailing. On 1987  [[Stephen Smale|Steve Smale]], [[Charles C. Pugh|Charles Pugh]] and Welington sailed the Pacific in a long journey on Smale's  43-foot ''Stardust''.<ref>((Cite book|last=Batterson, Steve, 1950-|title=Stephen Smale : the mathematician who broke the dimension barrier|date=2000|publisher=American Mathematical Society|isbn=0-8218-2045-1|location=Providence, RI|oclc=41662613))</ref>  On his 30-foot ''Doisdu'' boat, he sailed at least a hundred days a year, mostly along  [[Angra dos Reis]]'s coast. He interpreted the wind with mastery, a phenomenon that can be modeled by dynamic systems, his mathematical specialty. He was proud to have taken on board the ''Doisdu'' six [[Fields medal]]ists and many friends of IMPA.

He died on December 21, 2016, at age 70, of complications of a [[heart attack]].<ref>((Cite news|url=https://oglobo.globo.com/sociedade/educacao/morre-matematico-welington-de-melo-orientador-do-medalha-fields-20684114|title=Morre o matemático Welington de Melo, orientador do medalha Fields|work=O Globo))</ref>

==Awards and honors==
* [[Brazilian Academy of Sciences]], Member (1991)<ref>((Cite web|url=http://www.abc.org.br/membro/welington-celso-de-melo/|title=Welington Celso de Melo – ABC|language=pt-BR|access-date=2020-03-01))</ref>
* [[National Order of Scientific Merit]], Commander (1996) 
*  Invited Lecturer at the [[International Congress of Mathematicians]], (1998)<ref>((cite book|author=De Melo, W.|chapter=Rigidity and renormalization in one dimensional dynamical systems|title=Doc. Math. (Bielefeld) Extra Vol. ICM Berlin, 1998, vol. II|year=1998|pages=765–778|chapter-url=https://www.elibm.org/ft/10011664000))</ref>
* National Order of Scientific Merit, Grand Cross (2002) 
* [[TWAS Prize#Mathematics|Third World Academy of Sciences Prize]] (2003) 
* [[The World Academy of Sciences]], Member (2005)

==References==
((Reflist))

==External links==
*[http://w3.impa.br/~demelo/ Welington de Melo's website at IMPA] ((Webarchive|url=https://web.archive.org/web/20110706160935/http://w3.impa.br/~demelo/ |date=2011-07-06 ))
*[http://w3.impa.br/~demelo/vitaedemelo.pdf Curriculum Vitae]
*((MathGenealogy |id=24583 ))

((Authority control))

((DEFAULTSORT:Melo, Welington de))
[[Category:1946 births]]
[[Category:2016 deaths]]
[[Category:21st-century Brazilian mathematicians]]
[[Category:20th-century Brazilian  mathematicians]]
[[Category:People from Minas Gerais]]
[[Category:Recipients of the Great Cross of the National Order of Scientific Merit (Brazil)]]
[[Category:Instituto Nacional de Matemática Pura e Aplicada alumni]]
[[Category:Instituto Nacional de Matemática Pura e Aplicada researchers]]
[[Category:TWAS laureates]]
[[Category:Dynamical systems theorists]]


((Brazil-scientist-stub))

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