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Seminars "Proof Theory" and "Logic Online Seminar"
July 6, 2020 17:30, Moscow, Steklov Mathematical Institute (8 Gubkina), room 313 + Zoom


Giant and illusionary giant Goodstein principles

Andreas Weiermann


https://youtu.be/HoYUh5FrFAc

Abstract: We analyze some Goodstein principles which are defined with respect to natural fast growing functions labeled by ordinals not exceeding $\varepsilon_0$. Some, the giant ones, will be proof-theoretic strong whereas others, the illusionary giant ones, will turn out to be comparatively weak although they look strong at first sight.

Language: English

* Join Logic Online Seminar via Zoom, 06.07.2020 17:30 MSK (GMT +3): https://zoom.us/j/887484923


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