Nelson José Merentes Díaz (born 6 May 1954) is a

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

researcher Research is " creative and systematic work undertaken to increase the stock of knowledge". It involves the collection, organization and analysis of evidence to increase understanding of a topic, characterized by a particular attentiveness ...

, and

politician A politician is a person active in party politics, or a person holding or seeking an elected office in government. Politicians propose, support, reject and create laws that govern the land and by an extension of its people. Broadly speaking, a ...

Academic activity

In 1978 Merentes finished his bachelor's degree of Mathematics at

Central University of Venezuela The Central University of Venezuela (Spanish: ''Universidad Central de Venezuela''; UCV) is a public university of Venezuela located in Caracas. It is widely held to be the highest ranking institution in the country, and it also ranks 18th in L ...

and continued his post graduate education taking courses on Economy and Finance, as well as in multifunction techniques for the study of economic problems, completing finally a

doctorate A doctorate (from Latin ''docere'', "to teach"), doctor's degree (from Latin ''doctor'', "teacher"), or doctoral degree is an academic degree awarded by universities and some other educational institutions, derived from the ancient formalism ''l ...

in Mathematics with

summa cum laude Latin honors are a system of Latin phrases used in some colleges and universities to indicate the level of distinction with which an academic degree has been earned. The system is primarily used in the United States. It is also used in some Sou ...

honors, at the

Eötvös Loránd University Eötvös Loránd University ( hu, Eötvös Loránd Tudományegyetem, ELTE) is a Hungarian public research university based in Budapest. Founded in 1635, ELTE is one of the largest and most prestigious public higher education institutions in Hung ...

Budapest Budapest (, ; ) is the capital and most populous city of Hungary. It is the ninth-largest city in the European Union by population within city limits and the second-largest city on the Danube river; the city has an estimated population ...

(

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia a ...

) (1991). Merentes developed most of his research and teaching at Central University of Venezuela where he participated as professor, representative and member of various councils and committees.

Public office work

Merentes also worked extensively in public administration. From 2000 to 2001 he was the Economy and Finance subcommittee's chairman of the National Legislative Committee. He also worked for the Ministry of Finance as deputy minister of Regulation and Control (2000-2001). In 2001 he was appointed as

Minister of Finance A finance minister is an executive or cabinet position in charge of one or more of government finances, economic policy and financial regulation. A finance minister's portfolio has a large variety of names around the world, such as "treasury", " ...

of Venezuela by President

Hugo Chavez Hugo or HUGO may refer to: Arts and entertainment * ''Hugo'' (film), a 2011 film directed by Martin Scorsese * Hugo Award, a science fiction and fantasy award named after Hugo Gernsback * Hugo (franchise), a children's media franchise based on a ...

. He held that position until the following year, when he was designated as Science and Technology Minister. From that position he was called by President Chavez for the presidency of Social Development Bank (BANDES), a position he left to return to the Ministry of Finance in early 2004. During his second term, took place the creation of the FONDEN, Venezuela's National Development Fund. From April 2009 he became a president of the

Central Bank of Venezuela The Central Bank of Venezuela ( es, Banco Central de Venezuela, BCV) is the central bank of Venezuela. It maintains a fixed exchange rate for the Venezuelan bolívar and since 1996 is the governing agent of the Venezuelan Clearing House System ...

until 2013. In April 2013 is appointed as

Nicolás Maduro Nicolás Maduro Moros (; born 23 November 1962) is a Venezuelan politician and president of Venezuela since 2013, with his presidency under dispute since 2019. Beginning his working life as a bus driver, Maduro rose to become a trade unio ...

. In January 2014, he was re-designated as president of the

Sanctions

In 2017, Canada sanctioned Merentes and other Venezuelan officials under the ''

Justice for Victims of Corrupt Foreign Officials Act Magnitsky legislation refers to laws providing for governmental sanctions against foreign individuals who have committed human rights abuses or been involved in significant corruption. They originated with the United States which passed the firs ...

'', stating: "These individuals are responsible for, or complicit in, gross violations of internationally recognized human rights, have committed acts of significant corruption, or both."

Published works

As a researcher Merentes has published more than 200

scientific papers : ''For a broader class of literature, see Academic publishing.'' Scientific literature comprises scholarly publications that report original empirical and theoretical work in the natural and social sciences. Within an academic field, scienti ...

, including some in specialized mathematical study journals. His field of study was mainly focused on the study of

differential equation In mathematics, a differential equation is an equation that relates one or more unknown functions and their derivatives. In applications, the functions generally represent physical quantities, the derivatives represent their rates of change, an ...

s and

Lipschitz continuity In mathematical analysis, Lipschitz continuity, named after German mathematician Rudolf Lipschitz, is a strong form of uniform continuity for functions. Intuitively, a Lipschitz continuous function is limited in how fast it can change: there exis ...

. some of his notable contributions include: * ''On the Composition Operator in AC

, b The comma is a punctuation mark that appears in several variants in different languages. It has the same shape as an apostrophe or single closing quotation mark () in many typefaces, but it differs from them in being placed on the baseline o ...

' (1991), * ''On the Composition Operator in BV φ ; b' (1991) * ''On Functions of Bounded (p,k)-Variation'' (1992) (with S. Rivas and J. L. Sánchez) * ''Characterization of Globally Lipschitzian Composition Operators in the Banach Space BV²_p

' (1992) (with J. Matkowski) * ''Explicit Petree's function of interpolation of the spaces H _p ^s'' (1993) * ''On the Composition Operator between RV_p

and BV

' (1995) (with S. Rivas) * ''Uniformly Continuous Set-valued Composition Operators in the Spaces of Functions of Bounded Variation in the Sense of Wiener'' (2010) (with A. Azócar, J. A. Guerrero and J. Matkowski) * ''Locally Lipschitz Composition Operators in Spaces of Functions of Bounded Variation'' (2010) (with J. Appell y J.L. Sanchez) * ''Measures of Noncompactness in the Study of Asymptotically Stable and Ultimately Nondecreasing Solutions of Integral Equations'' (2010) (with J. Appell y J. Banaś) * ''Exact Controllability of Semilinear Stochastic Evolution Equation'' (2011) (with D. Barráez, H. Leiva and M. Narváez) * ''Integral Representation of Functions of Bounded Second ϕ-Variation in the Sense of Schramm'' (2011) (with J. Giménez and S. Rivas) * ''Approximate Controllability of Semilinear Reaction Diffusion Equations'' (2012) (with H. Leiva and J. L. Sánchez) * ''Uniformly Bounded Set-valued Composition Operators in the Spaces of Functions of Bounded Variation in the Sense of Schramm'' (2012) (with T. Ereú, J. L. Sánchez and M. Wróbel)

References

{{DEFAULTSORT:Merentes, Nelson 1954 births Living people Venezuelan mathematicians Nicolás Maduro ministers Finance ministers of Venezuela Presidents of the Central Bank of Venezuela United Socialist Party of Venezuela politicians Central University of Venezuela alumni Eötvös Loránd University alumni Venezuelan Ministers of Science Venezuelan Ministers of Technology Hugo Chávez ministers