Research activity information

• Oct. 2025 National University of Colombia (Medellín Campus), Faculty of Sciences, Recognition Motion, Outstanding Contribution as a Graduate of the Master’s Program in Mathematical Sciences

  Diego A. Mejía

  Currently an Associate Professor at Kobe University, recognized as one of the leading researchers in set theory worldwide. His academic work and continuous support for young Colombian mathematicians demonstrate a strong commitment to the advancement of knowledge and to the international projection of the Colombian scientific community.

  Others

  共同研究・競争的資金等の業績IDIRI


• Oct. 2025 Alejandro Ángel Escobar Foundation, Honorable Mention: 2025 National Awards for Science and Solidarity, Iterated Forcing with Finitely Additive Measures: Applications of Probability to Forcing Theory

  Andres Felipe, Uribe Zapata, Diego A. Mejia

  International academic award

  共同研究・競争的資金等の業績IDIRI


• May 2025 Colombian Academy of Exact, Physical, and Natural Sciences, Shizu and Yu Takeuchi prize 2024 for the Best Master Thesis (advisor), Iterated forcing with finitely additive measures: applications of probability to forcing theory

  Andres Felipe Uribe-Zapata, Diego A. Mejía

  International society

  共同研究・競争的資金等の業績IDIRI


• Apr. 2022 Shizuoka University, 第5期静岡大学若手重点研究者の称号

  Diego A. Mejia

  Others


• Apr. 2010 MEXT (Japan), Japanese Government (MEXT) Scholarship, Scholarship for doctoral studies

  Diego A. Mejia

  International academic award


• Jan. 2007 Mazda Foundation for Arts and Sciences, Mazda fellowship from the Mazda Foundation for Arts and Sciences, Scholarship for master studies

  Diego A. Mejia

  Publisher


• Sep. 2006 Universidad de Antioquia, Best university degree by program, Best university degree by program

  Diego A. Mejia

  International academic award


• Sep. 2004 Universidad de Antioquia, Worth exaltation in the Scientific Field for distinguised participation at the Colombian Mathematical Olympiad, Worth exaltation in the Scientific Field for distinguised participation at the Colombian Mathematical Olympiad

  Diego A. Mejia

  International academic award


• Dec. 2003 Universidad Antonio Narino, Bronze medal, VII Colombian Mathematical Olympiad, Bronze medal, VII Colombian Mathematical Olympiad

  Diego A. Mejia

  Japan society


• Dec. 2003 Universidad Antonio Narino, Silver Medal, VI Iberoamerican Mathematical Olympiad, Silver Medal, VI Iberoamerican Mathematical Olympiad

  Diego A. Mejia

  International society


• Mar. 2001 Universidad de Antioquia, Honor scholarship (Dean's list), Honor scholarship (Dean's list)

  Diego A. Mejia

  International academic award

• Directed schemes of ideals and cardinal characteristics. I: The meager additive ideal

  Miguel A. Cardona, Diego A. Mejía, Ismael E. Rivera-Madrid

  Corresponding, Mar. 2026, Comptes Rendus. Mathématique, 364, 107 - 125, English, International magazine, Co-authored internationally

  [Refereed]

  Scientific journal


• Slalom numbers

  Miguel Cardona, Viera Gavalova, Diego A. Mejia, Miroslav Repicky, Jaroslav Supina

  Corresponding, Dec. 2025, Dissertationes Mathematicae, 607, 1 - 67, English, International magazine

  [Refereed]

  Scientific journal


• UNIFORMITY NUMBERS OF THE NULL-ADDITIVE AND MEAGER-ADDITIVE IDEALS

  MIGUEL ANTONIO CARDONA, DIEGO ALEJANDRO MEJÍA, ISMAEL RIVERA-MADRID

  Corresponding, Aug. 2025, The Journal of Symbolic Logic, English

  [Refereed]

  Scientific journal


• Separating cardinal characteristics of the strong measure zero ideal

  Jorg Brendle, Miguel A. Cardona, Diego A. Mejia

  Corresponding, World Scientific Pub Co Pte Ltd, Apr. 2025, Journal of Mathematical Logic, English

  [Refereed]

  Scientific journal


• More about the cofinality and the covering of the ideal of strong measure zero sets

  Miguel A. Cardona, Diego A. Mejía

  Corresponding, Apr. 2025, Annals of Pure and Applied Logic, 176(4) (4), 103537, English

  [Refereed]

  Scientific journal


• The measure algebra adding θ-many random reals is θ-FAM-linked

  Diego A. Mejía, Andrés F. Uribe-Zapata

  Elsevier BV, Mar. 2025, Topology and its Applications, 371(1) (1), 109371, English

  [Refereed][Invited]

  Scientific journal


• Forcing techniques for Cichon’s Maximum: Lecture notes for the mini-course at the University of Vienna

  Diego A. Mejia

  Dec. 2024, Boletin de Matematicas, 31(1) (1), 1 - 48, English

  [Refereed]

  Scientific journal


• Continuum many different things: Localisation, anti-localisation and Yorioka ideals

  Miguel A. Cardona, Lukas Daniel Klausner, Diego A. Mejía

  Corresponding, Elsevier BV, Jul. 2024, Annals of Pure and Applied Logic, 175(7) (7), 103453, English

  [Refereed]

  Scientific journal


• Independence of Whitehead's Problem for Algebraists

  Diego A. Mejia, Carlos M. Parra-Londono

  Corresponding, Jun. 2024, Boletin de Matematicas (Universidad Nacional de Colombia), 30(2) (2), 61 - 80, Spanish, Castilian, Co-authored internationally

  [Refereed][Invited]

  International conference proceedings


• Lebesgue measure zero modulo ideals on the natural numbers

  VIERA GAVALOVÁ, DIEGO A. MEJÍA

  Abstract We propose a reformulation of the ideal $\mathcal {N}$ of Lebesgue measure zero sets of reals modulo an ideal J on $\omega $ , which we denote by $\mathcal {N}_J$ . In the same way, we reformulate the ideal $\mathcal {E}$ generated by $F_\sigma $ measure zero sets of reals modulo J, which we denote by $\mathcal {N}^*_J$ . We show that these are $\sigma $ -ideals and that $\mathcal {N}_J=\mathcal {N}$ iff J has the Baire property, which in turn is equivalent to $\mathcal {N}^*_J=\mathcal {E}$ . Moreover, we prove that $\mathcal {N}_J$ does not contain co-meager sets and $\mathcal {N}^*_J$ contains non-meager sets when J does not have the Baire property. We also prove a deep connection between these ideals modulo J and the notion of nearly coherence of filters (or ideals). We also study the cardinal characteristics associated with $\mathcal {N}_J$ and $\mathcal {N}^*_J$ . We show their position with respect to Cichoń’s diagram and prove consistency results in connection with other very classical cardinal characteristics of the continuum, leaving just very few open questions. To achieve this, we discovered a new characterization of $\mathrm {add}(\mathcal {N})$ and $\mathrm {cof}(\mathcal {N})$ . We also show that, in Cohen model, we can obtain many different values to the cardinal characteristics associated with our new ideals.

  Corresponding, Cambridge University Press (CUP), Dec. 2023, The Journal of Symbolic Logic, 90(3) (3), 1098 - 1128, English

  [Refereed]

  Scientific journal


• Many different uniformity numbers of Yorioka ideals

  Lukas Daniel Klausner, Diego Alejandro Mejía

  Jul. 2022, Archive for Mathematical Logic, 61, 653 - 683

  [Refereed]

  Scientific journal


• The covering number of the strong measure zero ideal can be above almost everything else

  Miguel A. Cardona, Diego A. Mejía, Ismael E. Rivera-Madrid

  Jul. 2022, Archive for Mathematical Logic, 61, 599 - 610

  [Refereed]

  Scientific journal


• Controlling classical cardinal characteristics while collapsing cardinals

  Martin Goldstern, Jakob Kellner, Diego A. Mej{\'{\i } }a, Saharon Shelah

  Institute of Mathematics, Polish Academy of Sciences, May 2022, Colloquium Mathematicum, 170(1) (1), 115 - 144, English

  [Refereed]

  Scientific journal


• Some notes about power residues modulo prime

  Diego A. Mejía, Yuki Kiriu

  Universidad Industrial de Santander, Mar. 2022, Revista Integración, 40(1) (1), 1 - 23

  [Refereed]

  Scientific journal


• Cichoń’s maximum without large cardinals

  Martin Goldstern, Jakob Kellner, Diego A. Mej{\'{\i } }a, Saharon Shelah

  European Mathematical Society - {EMS} - Publishing House {GmbH}, Nov. 2021, Journal of the European Mathematical Society, 24(11) (11), 3951 - 3967, English

  [Refereed]

  Scientific journal


• Preservation of splitting families and cardinal characteristics of the continuum

  Goldstern, M., Kellner, J., Mej{\'i}a, D.A., Shelah, S.

  Nov. 2021, Israel Journal of Mathematics, 246(1) (1), 73 - 129

  [Refereed]

  Scientific journal


• Filter-linkedness and its effect on preservation of cardinal characteristics

  Brendle, J., Cardona, M.A., Mej{\'i}a, D.A.

  Jan. 2021, Annals of Pure and Applied Logic, 172(1) (1), 102856

  [Refereed]

  Scientific journal


• Controlling cardinal characteristics without adding reals

  Goldstern, M., Kellner, J., Mej{\'i}a, D.A., Shelah, S.

  2021, Journal of Mathematical Logic, 21(3) (3), 2150018

  [Refereed]

  Scientific journal


• Some infinitely generated non-projective modules over path algebras and their extensions under Martin's axiom

  Ayako ITABA, Diego A. MEJ{\'{I } }A., Teruyuki YORIOKA

  Mathematical Society of Japan (Project Euclid), Apr. 2020, Journal of the Mathematical Society of Japan, 72(2) (2), 413 - 433

  [Refereed]

  Scientific journal


• On cardinal characteristics of Yorioka ideals

  Miguel A. Cardona, Diego A. Mejía

  Sep. 2019, Mathematical Logic Quarterly, 65(2) (2), 170 - 199

  [Refereed]

  Scientific journal


• Absoluteness theorems for arbitrary Polish spaces,Teoremas de absolutidad para espacios polacos arbitrarios

  Mej{\'i}a, D.A., Rivera-Madrid, I.E.

  Feb. 2019, Revista Colombiana de Matematicas, 53(2) (2), 109 - 123

  [Refereed]

  Scientific journal


• Matrix Iterations with Vertical Support Restrictions

  Diego A. Mej{\'{\i } }a

  {WORLD} {SCIENTIFIC}, Jan. 2019, Proceedings of the 14th and 15th Asian Logic Conferences, 213 - 248, English

  [Refereed][Invited]

  International conference proceedings


• Coherent systems of finite support iterations

  Vera Fischer, Sy D. Friedman, Diego A. Mejía, Diana C. Montoya

  Cambridge University Press, Mar. 2018, Journal of Symbolic Logic, 83(1) (1), 208 - 236, English

  [Refereed]

  Scientific journal


• Splitting, Bounding, and Almost Disjointness Can Be Quite Different

  Vera Fischer, Diego Alejandro Mejia

  Jun. 2017, CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 69(3) (3), 502 - 531, English

  [Refereed]

  Scientific journal


• The left side of Cichoń’s diagram

  Goldstern, M., Mej{\'i}a, D.A., Shelah, S.

  Apr. 2016, Proceedings of the American Mathematical Society, 144(9) (9), 4025 - 4042

  [Refereed]

  Scientific journal


• Template iterations with non-definable ccc forcing notions

  Diego A. Mejia

  Nov. 2015, ANNALS OF PURE AND APPLIED LOGIC, 166(11) (11), 1071 - 1109, English

  [Refereed]

  Scientific journal


• Rothberger gaps in fragmented ideals

  Joerg Brendle, Diego Alejandro Mejia

  2014, FUNDAMENTA MATHEMATICAE, 227(1) (1), 35 - 68, English

  [Refereed]

  Scientific journal


• Matrix iterations and Cichon's diagram

  Diego Alejandro Mejia

  May 2013, ARCHIVE FOR MATHEMATICAL LOGIC, 52(3-4) (3-4), 261 - 278, English

  [Refereed]

  Scientific journal


• Recursion, induccion y ordenes bien fundados (Recursion, induction and well-foundness)

  Diego A. Mejia, Carlos M, Parra-Londono

  Corresponding, Universidad Industrial de Santander, Dec. 2011, Revista Integracion, 29(2) (2), 143 - 150, Spanish, Castilian, International magazine

  [Refereed]

  Scientific journal

• A failed attempt to preserve unbounded families

  Diego A. Mejia

  Lead, Kyoto University, Jul. 2026, RIMS Kokyuroku, 2349, 45 - 51, English, Domestic magazine

  Introduction international proceedings


• Anatomy of E

  Diego A. Mejia

  Corresponding, Jul. 2024, 京都大学数理解析研究所講究録, 2290, 43 - 61, English

  Summary international conference


• Localization and anti-localization cardinals

  D.A. Mejia, Miguel Cardona

  Jul. 2023, Kyoto University RIMS Koukyuuroku, 2261, 47 - 77


• Forcing constellations of Cichon's diagram by using the Tukey order

  D.A. Mejia, Miguel Cardona

  Apr. 2022, Kyoto University RIMS Koukyuuroku, 2213, 14 - 47


• Forcing and combinatorics of names

  Diego A. Mejia

  Jul. 2020, Kyoto University RIMS Koukyuuroku, 2164, 34 - 49


• A note on "Another ordering of the ten cardinal characteristics in Cichon's diagram" and further remarks

  Diego A. Mejia

  Mar. 2019, Kyoto University RIMS Koukyuuroku, 2141, 1 - 15


• Lecture notes: Recent (and not that recent) forcing techniques on finite support iterations

  Diego A. Mejia

  Aug. 2018, Kyoto University RIMS Koukyuuroku, 2081, 7 - 27


• Coding Polish spaces

  Diego A. Mejia

  Oct. 2017, Kyoto University RIMS Koukyuuroku, 2050, 153 - 161


• Some models produced by 3D iterations

  Diego A. Mejia

  Jul. 2017, Kyoto University RIMS Koukyuuroku, 2042, 75 - 87


• Borel computation of names in template iterations.

  Diego A. Mejia

  Kyoto University, May 2015, Kyoto University RIMS Koukyuuroku, 1949, 54 - 61, English


• Preservation properties for iterations with finite support

  Diego A. Mejia

  Kyoto University, May 2014, Kyoto University RIMS Koukyuuroku, 1895, 68 - 78, English


• Models of some cardinal invariants with large continuum

  Diego A. Mejia

  Kyoto University, Sep. 2013, Kyoto University RIMS Koukyuuroku, 1821, 36 - 48, English

• Mathematical Interplays in Analysis, Algebra, and Logic

  Miguel Cardona, Diego A. Mejia, Andres Uribe-Zapata

  Contributor, Finitely Aditive Measures on Boolean Algebras, Springer Proceedings in Mathematics & Statistics, May 2026, English, Accepted Book Chapter

  [Refereed]

  Scholarly book


• Set Theory: Reals and Topology

  Diego A. Mejia

  Editor, Editor, Kyoto University Research Institute for Mathematical Sciences, Sep. 2021, 1-86


• Proceedings of the 14th and 15th Asian Logic Conferences

  Kim, Byunghan, Brendle, Joerg, Lee, Gyesik, Liu, Fenrong, Ramanujam, R, Srivastava, Shashi M, Tsuboi, Akito, Yu, Liang

  Contributor, Matrix iterations with vertical support restrictions, World Scientific Publications, Jan. 2019, 213-248

• Knaster-like properties at singular cardinals

  Diego A. Mejia

  Yamaguchi Set Theory Seminar 2026, Jun. 2026, English, Iwakuni city, Yamaguchi-ken, Japan, Domestic conference, Co-authored internationally

  Oral presentation


• The structure of the real line

  Diego A. Mejia

  Coloquio de Matematicas Oswaldo Dede Mejia, Apr. 2026, Spanish, Castilian, Diego A Mejía.jpg, Others, Flyer, No password, Universidad del Atlantico, Barranquilla, Colombia

  [Invited]

  Invited oral presentation

  添付ファイルのURL


• Isomorphism Theorems for ideals in Polish spaces

  Diego A. Mejia

  RIMS Workshop on Set Theory 2025: Recent Developments in Axiomatic Set Theory, Dec. 2025, English, Kyoto University RIMS, Japan, International conference, Co-authored internationally

  Oral presentation


• Cardinal characteristics of the null-additive and meager-additive ideals

  Diego A. Mejia

  18th Asian Logic Conference, Sep. 2025, English

  Oral presentation


• Forcing techniques for finite support iterations

  Diego A. Mejia

  Conference on the occasion of Jörg Brendle's 60th birthday, Sep. 2025, English

  Oral presentation


• The cofinality of the strong measure zero ideal

  Diego A. Mejia

  The Vienna Oracle of Set Theory, Jul. 2025, English

  Oral presentation


• Directed schemes of ideals and cardinal characteristics

  Diego A. Mejia

  Logic Colloquium 2025, Jul. 2025, English

  Oral presentation


• Strong measure zero, additive ideals, and their cardinal characteristics

  Diego A. Mejia

  19th Kansai Set Theory seminar, Dec. 2024, English

  Oral presentation


• Slalom numbers

  Diego A. Mejia

  Symposium on Advances in Mathematical Logic, Jul. 2024, Japanese

  [Invited]

  Invited oral presentation


• Malliaris' and Shelah's p=t (mini-course)

  Diego A. Mejia

  Shizuoka University, Special Seminar in Set Theory, Mar. 2024, English

  [Invited]

  Public discourse


• Mini-course: Forcing techniques for Cichon's Maximum

  Diego A. Mejia

  University of Vienna, Research Seminar in Set Theory, English

  [Invited]

  Public discourse


• Ultrafilters and finitely additive measures in forcing theory

  Diego A. Mejia

  Wroclaw Set Theory Seminar, Nov. 2023, English

  [Invited]

  Public discourse


• Iterations with ultrafilter-limits and fam-limits

  Diego A. Mejia

  Logic Colloquium, University of Vienna, Nov. 2023, English

  [Invited]

  Public discourse


• Two-dimensional iterations with fam-limits

  Diego A. Mejia

  京都大学RIMS研究集会2023巨大基数と連続体, Oct. 2023, Domestic conference


• Japan and the real numbers (in Spanish)

  Diego A. Mejia

  56th National Congress of the Mexican Mathematical Society, Oct. 2023, Domestic conference

  [Invited]


• Finitely additive measures and closed measure zero sets

  Diego A. Mejia

  Iberoamerican and Pan Pacific International Conference on Topology and its Applications, Sep. 2023, Domestic conference

  [Invited]


• Preservation results related to finitely additive measures on Boolean algebras

  Diego A. Mejia

  University of Vienna, Research Seminar in Set Theory, Jun. 2023, Domestic conference

  [Invited]


• Forcing and combinatoris of the reals

  Diego A. Mejia

  TUKE x UPJS Colloquium, Jun. 2023, Domestic conference

  [Invited]


• Cofinality of the ideal of strong measure zero sets

  Diego A. Mejia

  Colombia-Mexico seminar of Set Theory, Nov. 2022, Domestic conference

  [Invited]


• Measure zero modulo ideals

  Diego A. Mejia

  京都大学RIMS研究集会2022強制法と基数算術の新たな展開, Oct. 2022, Domestic conference


• 強測度ゼロ集合のイデアルに関連する基数不変量

  Diego A. Mejia

  日本数学会2022年度秋季総合分科会, Sep. 2022, Domestic conference


• Cardinal Characteristics Associated with the Ideal of Strong Measure Zero Sets

  Diego A. Mejia

  ESI Set Theory Workshop, Jul. 2022, Domestic conference

  [Invited]


• Variations of the negation of Riis’ axiom

  Diego A. Mejia

  1st Meeting Brazil-Colombia in Logic, Dec. 2021, Domestic conference

  [Invited]


• Measure zero modulo ideals

  Diego A. Mejia

  XI Simposio Nororiental de Matematicas, Dec. 2021, Domestic conference

  [Invited]


• The infinite and the real numbers

  Diego A. Mejia

  II Workshop of Basic Sciences: a closeup to Engineering applications, Oct. 2021, Domestic conference

  [Invited]


• Recent forcing techniques: restrictions to submodels I and II

  Diego A. Mejia

  RIMS研究集会2021 実数の集合論における近年の進展, Oct. 2021, Domestic conference

  [Invited]


• Combinatorics of the real line since its beginnings

  Diego A. Mejia

  Science Mondays, Sep. 2021, Domestic conference

  [Invited]


• Continuum-many many things

  Diego A. Mejia

  XVI International Luminy Workshop in Set Theory, Sep. 2021, Domestic conference

  [Invited]


• Coherent systems of finite support iterations

  Diego A. Mejia

  A short talk series: Research in Set Theory, Jun. 2021, Domestic conference

  [Invited]


• Preserving failures of simple fragments of Martin's axiom

  Diego A. Mejia

  Kobe Set Theory Workshop 2021 on the occasion of Sakaé Fuchino's Retirement, Mar. 2021, Domestic conference

  [Invited]


• Lebesgue measure zero modulo ideals

  Diego A. Mejia

  日本数学会2020年度秋季総合分科会, Sep. 2020, Domestic conference


• Preserving splitting families

  Diego A. Mejia

  Research Seminar, Kurt Goedel Research Center, University of Vienna, May 2020, Domestic conference

  [Invited]


• Cichon's maximum without large cardinals

  Diego A. Mejia

  XVIII Latin American Symposium of Mathematical Logic, Dec. 2019, Domestic conference

  [Invited]


• Cichon's maximum without large cardinals

  Diego A. Mejia

  京都大学RIMS研究集会2019集合論と無限, Nov. 2019, Domestic conference


• Cichon's maximum over ZFC alone

  Diego A. Mejia

  日本数学会2019年度秋季総合分科会, Sep. 2019, Domestic conference

  [Invited]


• Preservation Theorems of finite support iterations I and II

  Diego A. Mejia

  Set Theory of the Reals, Aug. 2019, Domestic conference

  [Invited]


• Many different uniformity numbers of Yorioka ideals

  Diego A. Mejia

  RIMS研究集会2018 公理的集合論とその応用, Nov. 2018, Domestic conference


• Filter-linkedness and its effect on cardinal characteristics of the continuum

  Diego A. Mejia

  Set Theory Today: A conference in honor of Georg Cantor, Sep. 2018, Domestic conference

  [Invited]


• Filter-linkedness and its effect on cardinal characteristics of the continuum

  Diego A. Mejia

  Joint meeting of the Colombian and Mexican Mathematical Society, May 2018, Domestic conference

  [Invited]


• 強制法理論及び連続体上の組合せ論

  Diego A. Mejia

  日本数学会2018年度年会, Mar. 2018, Domestic conference


• Ultrafilter limits in matrix iterations

  Diego A. Mejia

  2nd Pan Pacific International Conference on Topology and Applications, Nov. 2017, Domestic conference

  [Invited]


• Recent (and not that recent) forcing techniques on finite support iterations

  Diego A. Mejia

  RIMS研究集会２０１７ 反復強制法の理論と基数不変量, Nov. 2017, Domestic conference

  [Invited]


• Multiple dimensional finite support iterations

  Diego A. Mejia

  The 15th Asian Logic Conference, Jul. 2017, Domestic conference

  [Invited]


• The left side of Cichon's diagram

  Diego A. Mejia

  RIMS研究集会２０１６ 無限組合せ論と強制法理論, Nov. 2016, Domestic conference


• Several Values in Cichon's diagram

  Diego A. Mejia

  RIMS研究集会２０１６ 数学基礎論とその応用, Sep. 2016, Domestic conference


• Expected values for the a.d. number and 3D-iterations

  Diego A. Mejia

  Winter School in Abstract Analysis, section: Set Theory and Topology, Feb. 2016, Domestic conference


• Cardinal invariants of ideas related to the strong measure zero ideal

  Diego A. Mejia

  1st Pan Pacific International Conference on Topology and Applications, Nov. 2015, Domestic conference

  [Invited]


• Many different values in Cichon's diagram

  Diego A. Mejia

  The 19th Midrasha Mathematicae, 8th Young Set Theory Workshop, Oct. 2015, Domestic conference

  [Invited]


• Splitting, bounding and almost disjointness number

  Diego A. Mejia

  Winter School in Abstract Analysis, section: Set Theory and Topology, Feb. 2015, Domestic conference


• Cichon's diagram and large continuum

  Diego A. Mejia

  Workshop on Mathematical Logic on the Occasion of Sakae Fuchino's 60th Birthday, Nov. 2014, Domestic conference

  [Invited]


• sba

  Diego A. Mejia

  RIMS研究集会２０１４ 集合論における無限組み合わせ論とその応用, Nov. 2014, Domestic conference


• Matrix iterations and Cichon's diagram

  Diego A. Mejia

  Logic Colloquium 2014, Jul. 2014, Domestic conference

  [Invited]


• Rothberger gaps in F_\sigma ideals

  Diego A. Mejia

  ESI Set Theory Programme. Forcing and large cardinals workshop, Sep. 2013, Domestic conference

  [Invited]


• Template iterations with non-definable posets

  Diego A. Mejia

  RIMS研究集会２０１３ 反映原理と巨大基数の集合論, Sep. 2013, Domestic conference


• Models of some cardinal invariants with large continuum

  Diego A. Mejia

  RIMS研究集会２０１２ 強制法による拡大と巨大基数, Dec. 2012, Domestic conference


• Matrix iterations and Cichon's diagram

  Diego A. Mejia

  Joint FWF-JSPS Seminar on Forcing in Set Theory, Jan. 2012, Domestic conference

  [Invited]


• Forcing iterations and Cichon's diagram

  Diego A. Mejia

  数学基礎論若手の会 2011, Dec. 2011, Domestic conference

• European Set Theory Society

  Apr. 2025 - Present


• Colombian Mathematical Society

  Jan. 2018 - Present


• The Mathematical Society of Japan

  Oct. 2017 - Present


• Association for Symbolic Logic

  Apr. 2010 - Present

• Models of Classical Cardinal Characteristics and Open Questions

  Diego A. Mejia

  Jul. 2026 - Present, TU Wien Research Data Repository

  Wolfram Mathematica Notebook

  DOI

• Advances on Combinatorics of the real line and topology

  基盤研究(C), Apr. 2023 - Mar. 2027


• 反復強制法の理論における新たな発展

  若手研究(B), 若手研究(B), Apr. 2018 - Mar. 2022

  Competitive research funding

• 静岡大学FSS

  Others, 高校生の受け入れ, 01 Aug. 2024 - 30 Jun. 2025


• コロンビア国立大学での講義（オンライン）

  Lecturer, 18 Sep. 2024 - 18 Sep. 2024


• 静岡大学私立高校SSH

  Others, 07 Aug. 2024 - 08 Aug. 2024


• 静岡大学FSS

  Others, 高校生の受け入れ, 01 Oct. 2023 - 15 Jun. 2024

• Graduate of the University of Antioquia Receives Honorary Mention in the 2025 Alejandro Ángel Escobar Awards

  Other than myself, University of Antioquia website, Nov. 2025

  Internet


• Mathematicians from the National University of Colombia propose a new approach to understanding infinity

  National University of Colombia Agency, 03 Oct. 2025, Medellin (Colombia)

  Internet


• Winners of the 2025 National Awards for Science and Solidarity of the Alejandro Ángel Escobar Foundation

  La Patria (newspaper), 28 Sep. 2025, Colombia

  Paper


• Andres Uribe, winner of the Prize Shizu and Yu Takeuchi, 2024

  UN Radio (Colombia), UNAL News, 28 May 2025, Medellin (Colombia), Interview to Andres Uribe-Zapata and his thesis advisors Diego A. Mejia and Carlos M. Parra, about his Prize Shizu and Yu Takeuchi 2024 for the best Master Thesis, awarded by the Colombian Academy of Science

  Media report

• Program Committee (Set Theory), XXI SLALM

  Program Committee (Set Theory), XXI SLALM

  Alexander Berenstein, Diego A. Mejia, Ramiro de la Vega, Dana Bartosova

  01 Jun. 2026 - 05 Jun. 2026, Bogota, Colombia

  Competition etc


• Scientific Committee, The 10th European Set Theory Conference

  Scientific Committee, The 10th European Set Theory Conference

  Sandra Muller (chair), Diego A. Mejia, Omer Ben-Neria, Natasha Dobrinen, Gabriel Goldberg, Chris Lambie-Hanson, Andrew Marks, Jouko Vaananen, Matteo Viale

  18 May 2026 - 22 May 2026, Helsinki, Finland

  Academic society etc


• Organizer, Conference on the occasion of Jörg Brendle's 60th birthday

  Organizer, Conference on the occasion of Jörg Brendle's 60th birthday

  Diego A. Mejia, Teruyuki Yorioka

  02 Sep. 2025 - 05 Sep. 2025

  Academic society etc


• Program Committee, XXIV Colombian Congress of Mathematics

  Program Committee, XXIV Colombian Congress of Mathematics

  Diego A. Mejia, Alexander Berenstein

  02 Jun. 2025 - 06 Jun. 2025

  Academic society etc


• Organizer, Young Logicians Gathering in Japan 2022

  Organizer, Young Logicians Gathering in Japan 2022

  Diego A. Mejia

  25 Nov. 2022 - 27 Nov. 2022

  Academic society etc


• Organizer, Kyoto University RIMS Workshop 2020, Set Theory: Reals and Topology

  Organizer, Kyoto University RIMS Workshop 2020, Set Theory: Reals and Topology

  Diego A. Mejia

  16 Nov. 2020 - 20 Nov. 2020

  Academic society etc