Takehiko Gappo

About me

I am a mathematician working in set theory. In particular, I am interested in determinacy and inner model theory.

I am a postdoctoral researcher at TU Wien belonging to the Set Theory Group (FB8) of the Institute for Discrete Mathematics and Geometry. Since November 2022, I have been a project assistant in the FWF project I6087 (PI: Sandra Müller).

I completed my PhD at Rutgers University in October 2022 under the supervision of Grigor Sargsyan. I gave an invited talk at the DVMLG PhD Colloquium in 2024 in recognition of my doctoral excellence.

Upcoming schedule

May 9--11: Attending the Roaming Logic Conference in Warsaw to give a poster presentation.
June 23 -- July 4: Attending the 3rd Berkeley Conference on Inner Model Theory at UC Berkeley to give an invited talk.
July 7 -- 11: Attending Logic Colloquium 2025 at TU Wien to give a contributed talk.
September 1--5: Organizing Minisymposium in Set Theory with Corey B. Switzer (University of Vienna) at ÖMG-DMV Annual Meeting 2025 in Linz.
September 8--12: Organizing Young Set Theory Workshop 2025 at TU Wien as one of the local organizers.
November 3--7: Attending XVIII International Workshop in Set Theory in Luminy to give an invited talk.

Past activities

In 2025:

February 16--22: I gave an invited talk at the 7th Arctic Set Theory Workshop in Kilpisjärvi, Finland. I talked about joint work with J. P. Aguilra on the exact large cardinal strength of games of fixed countable length.
January 7--10: I visited Gdańsk for research collaboration with Grigor Sargsyan.

In 2024:

November 17--20: I visited Wrocław to give an invited seminar talk at Wrocław Set Theory & Topology Seminar.
October 10: I gave a contributed online talk at RIMS set theory conference (Kyoto/online). I talked about joint work with J. P. Aguilera on the equivalence between mice and determinacy of fixed countable length. My slides are available on their website.
October 8: I gave an invited talk at PhD Colloquium, which is part of Colloquium Logicum 2024 in Vienna. Invitation to speak at the PhD Colloquium is recognition of doctoral excellence within or connected to the German-speaking research community.

Contact Information

Email: takehiko.gappo [at] tuwien [dot] ac [dot] at

Address:

Institut für Diskrete Mathematik und Geometrie, TU Wien

Wiedner Hauptstraße 8-10/104, 1040 Wien, Austria.

Nov. 27, 2022 in Vienna.