Castellano

   
 
 

 
 
 

 

 
 

Dr. Sebastian Fortin

 
 

Name: Sebastian Ezequiel Fortin

e-mail: sfortinconicet.gov.ar

University degree:

  • M.Sc. on physics, University of Buenos Aires (UBA)

Postgraduate Degree:

  • PhD on physics, University of Buenos Aires (UBA)

  • PhD on philosophy and history of science, University of Tres de Febrero (UNTREF)

Current Positions:

  • Researcher at the CONICET (National Council of Scientific and Technical Research)

  • Associate professor ad honorem in the Instituto de Filosofía de la Universidad Austral

Research:

  • Philosophy of Physics: Quantum Information; Interpretation of Quantum Mechanics; Modal-Hamiltonian Interpretation; Classical Limit; Quantum Decoherence; Non-Unitary Evolutions; Irreversibility, Quantum Logic; Quantum Probabilities; Quantum Chaos

  • Philosophy of Chemistry: Quantum Chemistry; Isomerism; Hund´s Paradox; Molecular Structure

 
 

Download my Curriculum Vitae (CV) --> download

 
 

Refereed publications in journals

 
  1. “On the ontological status of molecular structure: is it possible to reconcile molecular chemistry with quantum mechanics?”, S. Fortin, M. Labarca y O. Lombardi, Foundations of Science 28, 709-725, 2023.
    link to the journal - preprint link

  2. “Quantum trans-statistics from an ontology of properties”, M. Pasqualini y S. Fortin, Revista Colombiana de Filosofía de la Ciencia, Vol. 23 Núm. 47, 293-330, 2023.
    link to the journal

  3. “Trans-estadística cuántica desde una ontología de propiedades”, M. Pasqualini y S. Fortin, Revista Colombiana de Filosofía de la Ciencia, Vol. 23 Núm. 47, 255-291, 2023.
    link to the journal

  4. “Mathematical Models for Unstable Quantum Systems and Gamow States”, M. Gadella, S. Fortin, J. P. Jorge y M. Losada, Entropy 24(6), 804, 2022.
    link to the journal

  5. “Trans-statistical behavior of a multiparticle system in an ontology of properties”, M. Pasqualini y S. Fortin, Foundations of Physics, 52, 70 (2022).
    link to the journal - preprint link

  6. “An Algebraic Model for Quantum Unstable States”, S. Fortin, M. Gadella, F. Holik, J. P. Jorge y M. Losada, Mathematics 10(23), 4562, 2022.
    link to the journal

  7. “La interpretación modal-hamiltoniana y la naturaleza relacional del tiempo”, M. Pasqualini y S. Fortin, Crítica, Vol. 54, No. 161, pp. 3-42, 2022.
    link to the journal

  8. “Possibility and time in quantum mechanics”, O. Lombardi, S. Fortin y M. Pasqualini, Entropy, 24(2), 249, 2022.
    link to the journal - preprint link

  9. “Entanglement and indistinguishability in a quantum ontology of properties”, S. Fortin and O. Lombardi, Studies in History and Philosophy of Modern Physics, vol. 91, 234-243, 2022.
    link to the journal - preprint link

  10. “Relational event-time in quantum mechanics”, S. Fortin, O. Lombardi and M. Pasqualini, Foundations of Physics, vol. 52, 10, 2022.
    link to the journal - preprint link

  11. “Is the problem of molecular structure just the quantum measurement problem?”, S. Fortin and O. Lombardi, Foundations of Chemistry, vol. 23, 379-395, 2021.
    link to the journal - preprint link

  12. “Acerca del estatuto ontológico de los fonones”, H. Accorinti and S. Fortin, Principia, vol. 24, número 2, pp. 391–417, 2020.
    link to the journal

  13. “The Frauchiger-Renner argument: A new no-go result?”, S. Fortin and O. Lombardi, Studies In History And Philosophy of Modern Physics, vol. 70, pp. 1 - 7, 2020.
    link to the journal - preprint link

  14. “Evolution of quantum observables: from non-commutativity to commutativity”, S. Fortin, M. Gadella, F. Holik and M. Losada, Soft Computing - (Print), vol. 24, pp. 10265 - 10276, 2020.
    link to the journal - preprint link

  15. “Gamow vectors formalism applied to the Loschmidt echo”, S. Fortin, M. Gadella, F. Holik and M. Losada, European Physical Journal Plus, vol. 135, 738, 2020.
    link to the journal - preprint link

  16. “The correspondence principle and the understanding of decoherence”, S. Fortin and O. Lombardi, Foundations of Physics, vol. 49, pp. 1372 - 1393, 2019.
    link to the journal - preprint link

  17. “A new chapter in the problem of the reduction of chemistry to physics: The Quantum Theory of Atoms in Molecules”, J. A. Jaimes Arriaga, S. Fortin and O. Lombardi, Foundations of Chemistry, Volume 21, Issue 1, pp 125–136, 2019.
    link to the journal - preprint link

  18. “Why molecular structure cannot be strictly reduced to quantum mechanics”, J. C. Martinez Gonzalez, S. Fortin and O. Lombardi, Foundations of Chemistry, Volume 21, Issue 1, pp 31–45, 2019.
    link to the journal - preprint link

  19. “La Teoría Cuántica de Átomos en Moléculas y su rol en la reducción de la química a la física”, J. A. Jaimes Arriaga and S. Fortin, Metatheoria, vol. 9, pp. 33 - 43, 2019.
    link to the journal

  20. “¿Es posible definir una flecha cuántica del tiempo mediante la hipótesis del colapso?”, C. López and S. Fortin, Metatheoria, vol. 9, pp. 69 - 82, 2019.
    link to the journal

  21. “Dynamics of algebras in quantum unstable systems”, M. Losada, S. Fortin, M. Gadella and F. Holik, International Journal of Modern Physics A, Vol. 33, Nos. 18 & 19 (2018) 1850109.
    link to the journal - preprint link

  22. “Understanding decoherence as an irreversible process”, S. Fortin and O. Lombardi, International Journal of Quantum Foundations, Volume 4, Issue 4, pages 247-267, 2018.
    link to the journal - preprint link

  23. “Let us build better boats. An answer to Jeffrey Seeman's "Moving beyond insularity in the history, philosophy, and sociology of chemistry"”, S. Fortin, O. Lombardi and J. C. Martínez González, Foundations of Chemistry, Volume 20, Issue 3, pp 261–264, 2018.
    link to the journal - preprint link

  24. “A new application of the modal-Hamiltonian interpretation of quantum mechanics: the problem of optical isomerism”, S. Fortin, O. Lombardi and J. C. Martinez Gonzalez, Studies in History and Philosophy of Modern Physics, Volume 62, Pages 123-135, 2018.
    link to the journal - preprint link

  25. “Classical limit and quantum logic”, M. Losada, S. Fortin and F. Holik, International Journal of Theoretical Physics, Volume 57, Issue 2, pp 465–475, 2018.
    link to the journal - preprint link

  26. “Interpretation and Decoherence: A Contribution to the Debate Vassallo & Esfeld Versus Crull”, S. Fortin and O. Lombardi, Foundations of Physics, Volume 47, Issue 11, pp 1423-1427, 2017.
    link to the journal - preprint link

  27. “Interpretations of Quantum Theory in the Light of Modern Cosmology”, M. Castagnino, S. Fortin, R. Laura and D. Sudarsky, Foundations of physics, Volume 47, Issue 11, pp 1387–1422, 2017.
    link to the journal - preprint link

  28. “The relationship between chemistry and physics from the perspective of Bohmian mechanics”, S. Fortin, O. Lombardi and J. C. Martinez Gonzalez, Foundations of Chemistry, Volume 19, Issue 1, pp 43-59, 2017.
    link to the journal - preprint link

  29. “On the interpretation of probabilities in generalized probabilistic models”, F. Holik, S. Fortin, G. Bosyk and A. Plastino, Lecture Notes in Computer Science, Volume 10106, pp 194-205, 2017.
    link to the journal - preprint link

  30. “Deflating the deflationary view of information”, O. Lombardi, S. Fortin and C. López, European Journal for Philosophy of Science, Volume 6, Issue 2, pp 209-230, 2016.
    link to the journal - preprint link

  31. “Isomerism and decoherence”, S. Fortin, O. Lombardi and J. C. Martinez Gonzalez, Foundations of Chemistry, Volume 18, Issue 3, pp 225-240, 2016.
    link to the journal - preprint link

  32. “Non-unitary evolution of quantum logics”, S. Fortin, F. Holik and L. Vanni, Springer Proceedings in Physics, Volume 184, pp 219-234, 2016.
    link to the journal - preprint link

  33. “The Role of Symmetry in the Interpretation of Quantum Mechanics”, O. Lombardi and S. Fortin, Electronic Journal of Theoretical Physics, Volume 12, Issue IYL15-34, 255-272, 2015.
    link to the journal - preprint link

  34. “Measurement, interpretation and information”, O. Lombardi, S. Fortin and C. López, Entropy, Volume 17, Issue 11, 7310-7330, 2015.
    link to the journal - preprint link

  35. “A semiclassical condition for chaos based on Pesin theorem”, I. Gomez, M. Losada, S. Fortin, M. Castagnino and M. Portesi, International Journal of Theoretical Physics, Volume 54, Issue 7, pp. 2192-2203, 2015.
    link to the journal - preprint link

  36. “A pluralist view about information”, O. Lombardi, S. Fortin and L. Vanni, Philosophy of Science, Volume 82, No. 5, pp. 1248-1259, 2015.
    link to the journal - preprint link

  37. Quantum decoherence: a logical perspective”, S. Fortin and L. Vanni, Foundations of Physics, Volume 44, Issue 12, pp. 1258-1268, 2014.
    link to the journal - preprint link

  38. “Partial traces in decoherence and in interpretation: What do reduced states refer to?”, S. Fortin and O. Lombardi, Foundations of Physics, Volume 44, Issue 4, pp. 426-446, 2014.
    link to the journal - preprint link

  39. “Decoherence: a closed-system approach”, S. Fortin, O. Lombardi and M. Castagnino, Brazilian Journal of Physics, Volume 44, Issue 1, pp 138-153, 2014.
    link to the journal -
    preprint link

  40. “La relación entre química y física: isomerismo óptico y la paradoja de Hund”, S. Fortin and J. C. Martínez González, Revista Colombiana de Filosofía de la Ciencia, Volumen XIII, Número 26, pp. 199-224, 2013.
    link to the journal - preprint link

  41. “Formal features of a General Theoretical Framework for Decoherence in open and closed systems”, M. Castagnino and S. Fortin, International Journal of Theoretical Physics 52 (5), pp. 1379-1398, 2013.
    link to the journal - preprint link

  42. “Medición y decoherencia desde la perspectiva de los sistemas cerrados”, S. Fortin, Anuario Filosófico 46 (2), pp. 281-310, 2013.
    link to the journal - preprint link

  43. “Non-Hermitian Hamiltonians in decoherence and equilibrium theory”, M. Castagnino and S. Fortin, Journal of Physics A: Mathematical and Theoretical (45), 444009, 2012.
    link to the journal - preprint link

  44. “Hacia una mejor comprensión de la decoherencia desde una perspectiva general”, S. Fortin, Revista Colombiana de Filosofía de la Ciencia, Volumen XII, Número 24, pp. 65-82, 2012.
    link to the journal - preprint link

  45. “Compatibility between environment-induced decoherence and the modal-Hamiltonian interpretation of quantum mechanics”, O. Lombardi, S. Fortin, M. Castagnino and S. Ardenghi, Philosophy of Science, Volume 78, pp. 1024-1036, 2011.
    link to the journal - preprint link

  46. “New bases for a general definition for the moving preferred basis”, M. Castagnino and S. Fortin, Modern Physics Letters A, Volume 26, Issue 31, pp. 2365-2373, 2011.
    link to the journal - preprint link

  47. “Predicting decoherence in discrete models”, M. Castagnino and S. Fortin, International Journal of Theoretical Physics, Springer, Volume 50, Number 7, pp. 2259-2267, 2011.
    link to the journal - preprint link

  48. “Foundations of quantum mechanics: decoherence and interpretation”, S. Ardenghi, S. Fortin, M. Narvaja and O. Lombardi, en Proceedings of the conference Quantum Gravity and the Foundations of Physics, International Journal of Modern Physics D, World Scientific, Volume 20, Issue 5, pp. 861-875, 2011.
    link to the journal - preprint link

  49. “The effect of random coupling coefficients on decoherence”, M. Castagnino, S. Fortin and O. Lombardi, Modern Physics Letters A, Volume 25, Issue 8, pp. 611-617, 2010.
    link to the journal - preprint link

  50. “Suppression of decoherence in a generalization of the spin-bath model”, M. Castagnino, S. Fortin and O. Lombardi, Journal of Physics A: Mathematical and Theoretical, Volumen 43, #065304, 2010.
    link to the journal - preprint link

  51. “Is the decoherence of a system the result of its interaction with the environment?”, M. Castagnino, S. Fortin and O. Lombardi, Modern Physics Letters A, Volume 25, Issue 17, pp. 1431-1439, 2010.
    link to the journal - preprint link

  52. “A general theoretical framework for decoherence in open and closed systems”, M. Castagnino, S. Fortin, R. Laura and O. Lombardi, Classical And Quantum Gravity, Volumen 25, #154002, 2008.
    link to the journal - preprint link

  53. “Colaboración Ítalo-Argentina para el estudio de celdas solares basadas en materiales III-V”, J. Plá, M. Barrera, M. Bosi, C. Pelosi, G. Attolini, F. Rubinelli, S. Fortín and M.G. Martínez Bogado, Avances en Energías Renovables y Medio Ambiente (AvERMA), Vol. 10, pp. 04-61, 2006.
    link to the journal - preprint link

  54. “Un diseño simple orientado a objetos de un equipo de fútbol de robots”, A. Martínez, D. Park, J. Burella, G. Viscuso, F. Holik and S. Fortin, Actas del III Workshop en Inteligencia Artificial aplicada a Robótica Móvil, Universidad Abierta Interamericana, Buenos Aires, 2006.
    preprint link

  55. “Respuesta espectral de celdas solares multijuntura para aplicaciones espaciales: diseño del equipo y primeras mediciones”, S. Fortin, M.G. Martínez Bogado and J. Plá, Avances en Energías Renovables y Medio Ambiente (AvERMA), Vol. 9, pp. 04-01, 2005.
    link to the journal - preprint link

  56. “Observaciones del asteroide 4 VESTA”, S. Fortin, P. Mastrolonardo, J. Pastini, A. Gonzalez and L. Zanellato, Revista Astronómica, Nº 252, pp. 10-11, 1995.
    paper link

 
 

Book chapters

 
  1. “The Case of Phonons: Explanatory or Ontological Priority”, H. Accorinti, S. Fortin, M. Herrera and J. A. J. Arriaga, en C. Soto (eds.), Current Debates in Philosophy of Science: In Honor of Roberto Torretti, ISBN: 978-3-031-32374-4, Cham, Suiza, 2023.
    link to the book - link al preprint

  2. “Relaciones entre química y física II: El problema de la estructura molecular”, S. Fortin. En: Labarca, M. y Fortin, S. (eds), Introducción a la Filosofía de la Química, Sociedad Chilena de Didáctica, Historia y Filosofía de la Ciencias Bella Terra Ltda., Santiago de Chile, Chile, 2023.
    link to the book

  3. “About the Nature of the Wave Function and Its Dimensionality: The Case of Quantum Chemistry” S. Fortin and J. A. Jaimes Arriaga (2022). In: Lombardi, O., Martínez González, J.C., Fortin, S. (eds) Philosophical Perspectives in Quantum Chemistry, ISBN: 978-3-030-98373-4, Synthese Library, vol 461. Springer, Cham, 2022.
    link to the book - link al preprint

  4. “Hacia una ontología para la química cuántica: La naturaleza de la función de onda”, J. A. Jaimes Arriaga and S. Fortin, Actas del XIX Congreso Nacional de Filosofía AFRA, N. Fernández, E. Ferreyro and D. Pared (eds.), ISBN: 978-987-811-006-6, Universidad Nacional de Mar del Plata, Mar del Plata, pp. 1528-1542, 2021.
    link to the book

  5. “Irreversibilidad, decoherencia y el eco de Loschmidt”, S. Fortin, C. López and M. Losada, Actas del XIX Congreso Nacional de Filosofía AFRA, N. Fernández, E. Ferreyro and D. Pared (eds.), ISBN: 978-987-811-006-6, Universidad Nacional de Mar del Plata, Mar del Plata, pp. 1432-1440, 2021.
    link to the book

  6. “Una vez más el viejo problema del realismo estructural”, H. Accorinti and S. Fortin, in Filosofía e Historia de la Ciencia del Cono Sur-Selección de trabajos del XI Encuentro, AFHIC, São Carlos, 2020, p. 302-313.
    link to the book

  7. “El problema de la existencia de los fonones”, S. Fortin, H. Accorinti and M. Herrera, in Filosofía e Historia de la Ciencia del Cono Sur-Selección de trabajos del XI Encuentro, AFHIC, São Carlos, 2020, p. 25-37.
    link to the book

  8. “Logical approach to the quantum-to-classical transition”, S. Fortin, M. Gadella, F. Holik and M. Losada, en O. Lombardi, S. Fortin, C. López and F. Holik (eds.), Quantum Worlds, Perspectives on the Ontology of Quantum Mechanics, ISBN: 978-1-108-47347-7, Cambridge University Press, Cambridge, 2019.
    link a Cambridge University Press - preprint link

  9. “Quantum Mechanics and Molecular Structure: The Case of Optical Isomers”, J. C. Martínez González, J. A. Jaimes Arriaga and S. Fortin, en O. Lombardi, S. Fortin, C. López and F. Holik (eds.), Quantum Worlds, Perspectives on the Ontology of Quantum Mechanics, ISBN: 978-1-108-47347-7, Cambridge University Press, Cambridge, 2019.
    link a Cambridge University Press - preprint link

  10. “A closed system approach to decoherence”, S. Fortin and O. Lombardi, en O. Lombardi, S. Fortin, C. López and F. Holik (eds.), Quantum Worlds, Perspectives on the Ontology of Quantum Mechanics, ISBN: 978-1-108-47347-7, Cambridge University Press, Cambridge, 2019.
    link a Cambridge University Press - preprint link

  11. “Modelos atómicos y moleculares: ¿independencia conceptual o relativa?”, H. Accorinti, J. C. Martínez González and S. Fortin, in S. Seno Chibeni, L. Zaterka, J. Ahumada, D. Letzen, C. C. Silva, L. Al-Chueyr, P. Martins, A. P. O. Pereira de Morais Brito (eds.), Filosofía e Historia de la Ciencia en el Cono Sur, Selección de trabajos del X Encuentro, ISBN: 978-950-33-1401-2, 464 páginas, Associação de Filosofia e História da Ciência do Cone Sul (AFHIC), Córdoba, 2018, pp. 293-304.
    link to the book

  12. “About the Concept of Information”, S. Fortin and O. Lombardi, en O. Lombardi, S. Fortin, F. Holik and C. Lopez (eds.), What is Quantum Information? ISBN: 978-1-10714-211-4, Cambridge University Press, Cambridge, 2017, pp. 9-34.
    link a Cambridge University Press

  13. “A top-down view of the classical limit of quantum mechanics”, S. Fortin and O. Lombardi, in R. E. Kastner, J. Jeknic-Dugic and G. Jaroszkiewicz (eds.), Quantum Structural Studies: Classical Emergence from the Quantum Level, ISBN: 978-1-78634-140-2, World Scientific Europe, London, 2016, pp. 435-468.
    World Scientific link - preprint link

  14. “¿Favorece la mecánica cuántica un indeterminismo epistemológico u ontológico?”, L. Vanni and S. Fortin, ¿Determinismo o Indeterminismo?: Grandes preguntas de las ciencias a la filosofía, C. Vanney and J. F. Franck (eds.), ISBN: 978-987-732-067-1, Rosario: Ediciones Logos, pp. 213-242, 2016.
    Amazon link - preprint link

  15. “Una perspectiva diacrónica en la estructura de la lógica cuántica”, S. Fortin and L. Vanni, in José Ahumada and Silvio Seno Chibeni (eds.), Filosofía e Historia de la Ciencia en el Cono Sur, Volumen IX, ISBN: 978-987-707-026-2, 716 páginas, Associação de Filosofia e História da Ciência do Cone Sul (AFHIC), Córdoba, 2015, pp. 31-39.
    preprint link

  16. “Determinismo e indeterminismo en mecánica cuántica”, S. Fortin, en C. Vanney and O. Lombardi (eds.), Fronteras del Determinismo Científico. Filosofía y Ciencias en Diálogo, ISBN: 978-84-16345-72-4, Editorial Biblioteca Nueva, Colección Fronteras, Madrid, 2015, pp. 68-84.
    Amazon link - preprint link

  17. “The ontological status of open quantum systems”, S. Fortin, en Zoheir Ezziane (ed.), Advances in Quantum Systems Research, ISBN: 978-1-62948-645-1, eISBN: 978-1-62948-656-7, Nova Science Publishers Inc., New York, 2014, pp. 300-25.
    Amazon link - preprint link

  18. “Una descripción de la apariencia del mundo clásico sin apelar a límites reductivos”, G. Bellomo and S. Fortin, Epistemología e Historia de la Ciencia 2013, H. Severgnini, J. G. Morales and D. L. Rabinovich (eds.), ISBN: 978-950-33-1073-1, Centro de Investigaciones de la Facultad de Filosofía y Humanidades de la Universidad Nacional de Córdoba, Córdoba, pp. 53-63, 2013.
    preprint link

  19. “The problem of identifying the system and the environment in the phenomenon of decoherence”, O. Lombardi, S. Fortin and M. Castagnino, en H. W. de Regt, S. Hartmann and S. Okasha (eds.), European Philosophy of Science Association (EPSA). Philosophical Issues in the Sciences Volume 3, ISBN 978-94-007-2403-7, Springer, Berlin, pp. 161-174, 2012.
    Springer link - preprint link

  20. “¿Cómo se distingue el sistema que decohere de su entorno?”, S. Fortin and O. Lombardi, en C. Celestino Silva and L. Salvático (eds.), Filosofia e História da Ciência no Cone Sul. Seleção de Trabalhos do 7º Encontro, ISBN: 978-85-60084-04-3, 589 páginas, Associação de Filosofia e História da Ciência do Cone Sul (AFHIC), Porto Alegre, 2012, pp. 529-535.
    preprint link

  21. “El problema de la definición de la base privilegiada móvil y una posible solución”, M. Castagnino and S. Fortin, Epistemología e Historia de la Ciencia 2012, L. Salvatico and M. Bozzoli L. Pesenti (eds.), ISBN 978-950-33-0999-5, Centro de Investigaciones de la Facultad de Filosofía y Humanidades de la Universidad Nacional de Córdoba, Córdoba, pp. 137-145, 2012.
    preprint link

  22. “The modal-Hamiltonian interpretation of quantum mechanics: physical relevance and philosophical implications”, O. Lombardi, S. Fortin, M. Castagnino and J. S. Ardenghi, en Jonathan P. Groffe (ed.), Quantum Mechanics, ISBN 978-1-61728-966-8, Nova Science Publishers Inc., New York, 2010, pp. 1-62.
    Nova link - preprint link

  23. “El esquema general de la decoherencia como punto de partida para un enfoque basado en valores medios”, M. Castagnino and S. Fortin, Epistemología e Historia de la Ciencia 2010, P. García and A. Massolo (eds.), ISBN 978-950-33-0816-5, Centro de Investigaciones de la Facultad de Filosofía y Humanidades de la Universidad Nacional de Córdoba, Córdoba, pp. 142-150, 2010.
    preprint link

  24. “Sobre un punto de vista heurístico concerniente a la naturaleza del espacio en mecánica cuántica”, S. Fortin, M. Narvaja and M. Lastiri, Epistemología e Historia de la Ciencia 2009, D. Letzen and P. Lodeyro (eds.), ISBN 978-950-33-0756-4, Centro de Investigaciones de la Facultad de Fzilosofía y Humanidades de la Universidad Nacional de Córdoba, Córdoba, pp. 198-204, 2009.
    preprint link

 
 

Books

 

  1. El Límite Clásico Basado en Decoherencia, S. Fortin, AV Akademikerverlag GmbH & Co. KG., Saarbrücken, Germany, 2012, ISBN: 978-3-659-00664-7.
    Amazon link - preprint link

  2. Introduction to the Modal-Hamiltonian Interpretation, O. Lombardi, S. Fortin, J. S. Ardenghi and M. Castagnino, Nova Science Publishers Inc., New York, 2010, ISBN: 978-1-61761-316-6.
    Amazon link - preprint link

 
 
 
 
 
   
   
 
 
 

Grupo de Filosofía de la Ciencia, Facultad de Filosofía y Letras - Facultad de Ciencias Exactas y Naturales - Universidad de Buenos Aires, Buenos Aires, Argentina