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پژوهشکدهٔ ریاضیات


Mathematical Logic Weekly Seminar سمینار هفتگی منطق ریاضی




TITLE  
Large Cardinals Beyond HOD


SPEAKER  
Joan Bagaria i Pigrau  
University of Barcelona  
 


TIME  
Thursday, November 7, 2024,   14:00 - 16:00


VENUE   Lecture Hall 1, Niavaran Bldg.



SUMMARY

 

I will present some recent results about new large cardinals that imply the set-theoretic universe is not HOD (the universe of Hereditarily Ordinal Definable sets). In particular, ultraexact cardinals are equiconsistent, modulo ZFC, with the existence of an I0 embedding, yet they imply that some successor cardinal is measurable in HOD. Moreover, the existence of an ultraexact cardinal together with an extendible cardinal below it is consistent with ZFC and refute Woodins HOD Conjecture. This is joint work with Juan Aguilera, Gabriel Goldberg, and Philipp Lucke.

Zoom room information:
https://us06web.zoom.us/j/81916335336?pwd=5zQT4lutMiBoY5Xp1pkFGtbqiaGozg.1

Meeting ID: 819 1633 5336
Passcode: 559618

 




تهران، ضلع‌ جنوبی ميدان شهيد باهنر (نياوران)، پژوهشگاه دانش‌های بنيادی، پژوهشکده رياضيات
School of Mathematics, Institute for Research in Fundamental Sciences (IPM), Niavaran Bldg., Niavaran Square, Tehran
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