Stefania Centrone is currently Privatdozentin at the University of Hamburg and was deputy Professor of Theoretical Philosophy at the Georg-August-Universität Göttingen. In 2012 she was awarded a DFG-Eigene Stelle for the project Bolzanos und Husserls Weiterentwicklung von Leibnizens Ideen zur Mathesis Universalis at the Carl-von-Ossietzky University of Oldenburg. She is author/editor, among others, of the volume Logic and philosophy of Mathematics in the Early Husserl (Springer 2010) and Studien zu Bolzano (Academia Verlag 2015).Deborah Kant studied mathematics at Free University and Humboldt University in Berlin, and specialized in set theory and logic. At the DMV Students' Conference 2015 in Hamburg, her talk about her master's thesis “Cardinal Sequences in ZFC” was being awarded. Since 2015, she is a PhD student at the Humboldt University Berlin under the supervision of Karl-Georg Niebergall with a project on naturalness inset theory.Deniz Sarikaya is PhD-Student of Philosophy (BA: 2012, MA: 2016) and studies Mathematics (BA: 2015) at the University of Hamburg with experience abroad at the Universiteit van Amsterdam and Universidad de Barcelona. He stayed a term as a Visiting Student Researcher at the University of California, Berkeley developing a project on the Philosophy of Mathematical Practice concerning the Philosophical impact of the usage of automatic theorem prover and as a RISE research intern at the University of British Columbia. He is mainly focusing on philosophy of mathematics and logic.

"This volume is incredibly rich and varied. ... this collection is as timely as it can be, and the editors clearly did an amazing job in putting it together. It is a fine addition to any departmental library, and any scholar interested in these topics will find new interesting ideas in all the contributions of this volume. " (Matteo de Ceglie, Studia Logica, July 17, Vol. 113 (1), 2025) “The volume succeeds in presenting a pleasantly non-biased, balanced, and multi-faceted selection of papers which does not convey the impression that any one particular approach or school would be too dominant. … The volume is well-edited and curated. The many cross-references amongst the contributions help one appreciate the volume as something more than the mere sum of its parts, after all, conveying the feel of an actual ongoing discussion.” (Hans-Christoph Kotzsch, Philosophia Mathematica, Vol. 30 (1), February, 2022)

• Part I: Current Challenges for the Set Theoretic Foundations.- 1. Neil Barton and Sy-David Friedman: Does set theory need an apology?.- 2. Laura Fontanella: The choice of new axioms in set theory.- 3. Michèle Friend: Pluralism in Foundations of Mathematics: Oxymoron, Paradox, Neither or Both?.- 4. Deborah Kant: A distinction between meta set theory and object set theory.- 5. Jan von Plato: The weaknesses of set theory.- 6. Claudio Ternullo: Multiversism and Naturalism.- 7. Philip Welch: Proving Theorems from Reflection: Global Reflection Theorems.- Part II: What are the Univalent Foundations?.- 8. Benedikt Ahrens and Paige North: Univalent foundations and the equivalence principle.- 9. Thorsten Altenkirch: A constructive justification of Homotopy Type Theory.- 10. Ulrik Buchholtz: Title: Higher structures in Homotopy Type Theory.- 11. Andrei Rodin: Models of HoTT and the Semantic View of Theories.- 12. Urs Schreiber: Modern Physics formalized in Modal Homotopy Type Theory.- 13. Vladimir Voevodsky: Multiple Concepts of Equality in the New Foundations of Mathematics.- Part III: Thoughts on the Foundations of Mathematics.- 14. Nathan Bowler: Foundations for the working mathematician, and for their computer.- 15. Merlin Carl: Formal and Natural Proof - A phenomenological approach.- 16. Stefania Centrone and Deniz Sarikaya: Thoughts on the Foundation of Mathematics: Logicism, Intuitionism and Formalism.- 17. Mirna Džamonja: A new foundational crisis in mathematics, is it really happening?.- 18. Penelope Maddy: What foundational jobs do we want done?.- 19. Giovanni Sambin: Dynamics in foundations: what does it mean in practice.- 20. Roy Wagner: Does mathematics need foundations?.

Stefania Centrone is currently Privatdozentin at the University of Hamburg and was deputy Professor of Theoretical Philosophy at the Georg-August-Universität Göttingen. In 2012 she was awarded a DFG-Eigene Stelle for the project Bolzanos und Husserls Weiterentwicklung von Leibnizens Ideen zur Mathesis Universalis at the Carl-von-Ossietzky University of Oldenburg. She is author/editor, among others, of the volume Logic and philosophy of Mathematics in the Early Husserl (Springer 2010) and Studien zu Bolzano (Academia Verlag 2015).Deborah Kant studied mathematics at Free University and Humboldt University in Berlin, and specialized in set theory and logic. At the DMV Students' Conference 2015 in Hamburg, her talk about her master's thesis “Cardinal Sequences in ZFC” was being awarded. Since 2015, she is a PhD student at the Humboldt University Berlin under the supervision of Karl-Georg Niebergall with a project on naturalness inset theory.Deniz Sarikaya is PhD-Student of Philosophy (BA: 2012, MA: 2016) and studies Mathematics (BA: 2015) at the University of Hamburg with experience abroad at the Universiteit van Amsterdam and Universidad de Barcelona. He stayed a term as a Visiting Student Researcher at the University of California, Berkeley developing a project on the Philosophy of Mathematical Practice concerning the Philosophical impact of the usage of automatic theorem prover and as a RISE research intern at the University of British Columbia. He is mainly focusing on philosophy of mathematics and logic.

"This volume is incredibly rich and varied. ... this collection is as timely as it can be, and the editors clearly did an amazing job in putting it together. It is a fine addition to any departmental library, and any scholar interested in these topics will find new interesting ideas in all the contributions of this volume. " (Matteo de Ceglie, Studia Logica, July 17, Vol. 113 (1), 2025) “The volume succeeds in presenting a pleasantly non-biased, balanced, and multi-faceted selection of papers which does not convey the impression that any one particular approach or school would be too dominant. … The volume is well-edited and curated. The many cross-references amongst the contributions help one appreciate the volume as something more than the mere sum of its parts, after all, conveying the feel of an actual ongoing discussion.” (Hans-Christoph Kotzsch, Philosophia Mathematica, Vol. 30 (1), February, 2022)

• Part I: Current Challenges for the Set Theoretic Foundations.- 1. Neil Barton and Sy-David Friedman: Does set theory need an apology?.- 2. Laura Fontanella: The choice of new axioms in set theory.- 3. Michèle Friend: Pluralism in Foundations of Mathematics: Oxymoron, Paradox, Neither or Both?.- 4. Deborah Kant: A distinction between meta set theory and object set theory.- 5. Jan von Plato: The weaknesses of set theory.- 6. Claudio Ternullo: Multiversism and Naturalism.- 7. Philip Welch: Proving Theorems from Reflection: Global Reflection Theorems.- Part II: What are the Univalent Foundations?.- 8. Benedikt Ahrens and Paige North: Univalent foundations and the equivalence principle.- 9. Thorsten Altenkirch: A constructive justification of Homotopy Type Theory.- 10. Ulrik Buchholtz: Title: Higher structures in Homotopy Type Theory.- 11. Andrei Rodin: Models of HoTT and the Semantic View of Theories.- 12. Urs Schreiber: Modern Physics formalized in Modal Homotopy Type Theory.- 13. Vladimir Voevodsky: Multiple Concepts of Equality in the New Foundations of Mathematics.- Part III: Thoughts on the Foundations of Mathematics.- 14. Nathan Bowler: Foundations for the working mathematician, and for their computer.- 15. Merlin Carl: Formal and Natural Proof - A phenomenological approach.- 16. Stefania Centrone and Deniz Sarikaya: Thoughts on the Foundation of Mathematics: Logicism, Intuitionism and Formalism.- 17. Mirna Džamonja: A new foundational crisis in mathematics, is it really happening?.- 18. Penelope Maddy: What foundational jobs do we want done?.- 19. Giovanni Sambin: Dynamics in foundations: what does it mean in practice.- 20. Roy Wagner: Does mathematics need foundations?.

Stefania Centrone is currently Privatdozentin at the University of Hamburg and was deputy Professor of Theoretical Philosophy at the Georg-August-Universität Göttingen. In 2012 she was awarded a DFG-Eigene Stelle for the project Bolzanos und Husserls Weiterentwicklung von Leibnizens Ideen zur Mathesis Universalis at the Carl-von-Ossietzky University of Oldenburg. She is author/editor, among others, of the volume Logic and philosophy of Mathematics in the Early Husserl (Springer 2010) and Studien zu Bolzano (Academia Verlag 2015).Deborah Kant studied mathematics at Free University and Humboldt University in Berlin, and specialized in set theory and logic. At the DMV Students' Conference 2015 in Hamburg, her talk about her master's thesis “Cardinal Sequences in ZFC” was being awarded. Since 2015, she is a PhD student at the Humboldt University Berlin under the supervision of Karl-Georg Niebergall with a project on naturalness inset theory.Deniz Sarikaya is PhD-Student of Philosophy (BA: 2012, MA: 2016) and studies Mathematics (BA: 2015) at the University of Hamburg with experience abroad at the Universiteit van Amsterdam and Universidad de Barcelona. He stayed a term as a Visiting Student Researcher at the University of California, Berkeley developing a project on the Philosophy of Mathematical Practice concerning the Philosophical impact of the usage of automatic theorem prover and as a RISE research intern at the University of British Columbia. He is mainly focusing on philosophy of mathematics and logic.

"This volume is incredibly rich and varied. ... this collection is as timely as it can be, and the editors clearly did an amazing job in putting it together. It is a fine addition to any departmental library, and any scholar interested in these topics will find new interesting ideas in all the contributions of this volume. " (Matteo de Ceglie, Studia Logica, July 17, Vol. 113 (1), 2025) “The volume succeeds in presenting a pleasantly non-biased, balanced, and multi-faceted selection of papers which does not convey the impression that any one particular approach or school would be too dominant. … The volume is well-edited and curated. The many cross-references amongst the contributions help one appreciate the volume as something more than the mere sum of its parts, after all, conveying the feel of an actual ongoing discussion.” (Hans-Christoph Kotzsch, Philosophia Mathematica, Vol. 30 (1), February, 2022)

• Part I: Current Challenges for the Set Theoretic Foundations.- 1. Neil Barton and Sy-David Friedman: Does set theory need an apology?.- 2. Laura Fontanella: The choice of new axioms in set theory.- 3. Michèle Friend: Pluralism in Foundations of Mathematics: Oxymoron, Paradox, Neither or Both?.- 4. Deborah Kant: A distinction between meta set theory and object set theory.- 5. Jan von Plato: The weaknesses of set theory.- 6. Claudio Ternullo: Multiversism and Naturalism.- 7. Philip Welch: Proving Theorems from Reflection: Global Reflection Theorems.- Part II: What are the Univalent Foundations?.- 8. Benedikt Ahrens and Paige North: Univalent foundations and the equivalence principle.- 9. Thorsten Altenkirch: A constructive justification of Homotopy Type Theory.- 10. Ulrik Buchholtz: Title: Higher structures in Homotopy Type Theory.- 11. Andrei Rodin: Models of HoTT and the Semantic View of Theories.- 12. Urs Schreiber: Modern Physics formalized in Modal Homotopy Type Theory.- 13. Vladimir Voevodsky: Multiple Concepts of Equality in the New Foundations of Mathematics.- Part III: Thoughts on the Foundations of Mathematics.- 14. Nathan Bowler: Foundations for the working mathematician, and for their computer.- 15. Merlin Carl: Formal and Natural Proof - A phenomenological approach.- 16. Stefania Centrone and Deniz Sarikaya: Thoughts on the Foundation of Mathematics: Logicism, Intuitionism and Formalism.- 17. Mirna Džamonja: A new foundational crisis in mathematics, is it really happening?.- 18. Penelope Maddy: What foundational jobs do we want done?.- 19. Giovanni Sambin: Dynamics in foundations: what does it mean in practice.- 20. Roy Wagner: Does mathematics need foundations?.