Maria Joita

Background

Maria Joita is a Romanian mathematician whose documented career has been based in Bucharest and Râmnicu Vâlcea. Her early professional work combined secondary-school teaching with research in mathematical sciences before she moved into university teaching and academic research.

Education

Joita studied mathematics at the University of Craiova from 1979 to 1983, receiving a Bachelor of Science degree. The university, founded in 1947, developed as a major public institution serving southwestern Romania and provided training in the natural sciences and mathematics.

She continued at the University of Bucharest, receiving a master's degree in mathematics in 1984 and a Ph.D. in mathematics in 1998. Her master's work concerned Powers factors under the supervision of Şerban Strătilă, while her doctoral thesis, supervised by Ion Colojoara, treated representations of topological groups and Hopf algebras. The University of Bucharest, founded in its modern form in 1864, is one of Romania's oldest public research universities and has long maintained established programs in mathematics.

In 2013 she completed a habilitation thesis on crossed products of pro-C*-algebras and Hilbert pro-C*-modules at the University of Bucharest. The habilitation qualified her for doctoral supervision under Romanian higher-education regulations.

Career

Joita began her professional career as a mathematics teacher at School No. 1 in Râmnicu Vâlcea from 1984 to 1986. She then worked as a junior researcher at Increst in Bucharest from 1986 to 1990, an early research stage preceding her university career.

From 1990 to 1992 she was an assistant at the Polytechnic Institute of Bucharest, later known as the University Politehnica of Bucharest. She joined the University of Bucharest as an assistant in 1992 and became a lecturer in 1998, teaching and conducting research in mathematics until 2014. She has also worked as a researcher at the university's Continuum Mechanics Research Center since 2007.

At the University Politehnica of Bucharest, she served as an associate professor from 2014 to 2016 and became a professor in 2016. The institution is a major Romanian technical university whose Faculty of Applied Sciences combines mathematical methods with applications in engineering and technology. Her teaching has included mathematical analysis, linear algebra, differential equations, complex analysis, and related subjects.

Joita's research is centered on operator algebras and functional analysis, with particular attention to locally and pro-C*-algebras, Hopf C*-algebras, Hilbert C*-modules, operator spaces, representations, and completely positive maps. She was a researcher at the Simion Stoilow Institute of Mathematics of the Romanian Academy from 2013 to 2016 and again participated in its research activity from 2022 to 2023. She has led or coordinated research projects on completely positive linear maps and operator models, served as a doctoral supervisor, and participated in national and international mathematical conferences.

Her academic service has included membership in Romania's National Commission for the Attestation of University Titles, Diplomas and Certificates, as well as editorial-board service for mathematical journals. She has also acted as a referee for journals in operator theory, functional analysis, mathematical physics, and related fields.

Achievements

• Joita led the 2006–2008 CNCSIS research project “Completely positive linear maps,” investigating structural questions about completely positive and completely multi-positive maps between C*-algebras and related Hilbert-module representations.

• She has published research on operator algebras and functional analysis, including work on pro-C*-algebras, crossed products, Hilbert C*-modules, representations, and completely positive maps.

• Joita has supervised doctoral research in mathematics and contributed to the training of researchers working in local operator systems and related areas.

Works

• monograph

  • Completely positive linear maps on pro-C*-algebras

    (Research monograph examining completely positive linear m...)

    2008
  • Hilbert modules over locally C*-algebras

    (Research monograph on Hilbert modules over locally C*-alg...)

    2006
  • Crossed products of locally C*-algebras

    (Research monograph on crossed products of locally C*-alge...)

    2007

• problem collection

  • Culegere de probleme de calcul diferenţial

    (Co-authored collection of problems in differential calcul...)

    1997
  • Culegere de probleme de calcul integral

    (Co-authored collection of problems in integral calculus w...)

    1998

• research article

  • Injective envelopes for locally C*-algebras

    (Co-authored research article introducing admissible injec...)

    2025
  • Strict completely positive maps between locally C*-algebras and representations on Hilbert modules

    (Research article describing the structure of continuous s...)

    2002
  • Crossed products of pro-C*-algebras and Hilbert pro-C*-modules

    (Research article establishing universal properties for cr...)

    2015
  • A Radon-Nikodym theorem for completely multi-positive linear maps and applications

    (Research article establishing a Radon-Nikodym-type theore...)

    2007
  • On representations associated with completely n-positive linear maps on pro-C*-algebras

    (Research article describing representations associated wi...)

    2008
  • Factorization properties for unbounded local positive maps

    (Research article concerning factorization properties of u...)

    2021
  • Crossed products by Hilbert pro-C*-bimodules

    (Co-authored research article examining crossed products b...)

    2013
  • Unbounded local completely contractive maps

    (Research article on unbounded local completely contractiv...)

    2022
  • Morita equivalence for locally C*-algebras

    (Research article on Morita equivalence for locally C*-alg...)

    2004

• textbook

  • Differential equations

    (University-level textbook on differential equations publi...)

    2003
  • A course of algebra

    (University-level algebra course published by the Universi...)

    2000

Membership

Joita has served on the editorial boards of the Banach Journal of Mathematical Analysis and Survey in Mathematics and its Applications. These journals publish research in mathematical analysis and provide platforms for the dissemination and review of specialist work. She has also participated in Romania's national commission for the evaluation and certification of university titles, diplomas, and certificates.

• Member of the editorial board.

  Banach Journal of Mathematical Analysis , Romania

• Member of the editorial board.

  Survey in Mathematics and its Applications , Romania

• Member of the Mathematics Commission.

  National Commission for the Attestation of University Titles, Diplomas and Certificates , Romania

  2018 - present

Connections

Joita is the daughter of Mihai and Elena. Her documented family connections are limited to these parental relationships.

Father:

Mihai

Mother:

Elena

References

• Curriculum vitae of Maria Joita, University Politehnica of Bucharest Documents Joita's education, academic appointments, research interests, books, scientific papers, grants, editorial work, and professional service.
  2020
• Curriculum Vitae of Maria Joiţa, University Politehnica of Bucharest Documents her later academic positions, research areas, publications, doctoral supervision, grants, institutional service, and conference activity.
  2025
• Maria Joita faculty profile Institutional profile describing Joita's education, professional career, research interests, editorial-board memberships, and selected papers.