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پژوهشکدهٔ ریاضیات


Mathematical Logic Weekly Seminar سمینار هفتگی منطق ریاضی




TITLE  
Galvins Question on Non-$\sigma$-well Ordered Lines


SPEAKER  
Hossein Lamei Ramandi  
University of Toronto, Canada  
 


TIME  
Monday, July 22, 2019,   14:00 - 16:00


VENUE   Lecture Hall 1, Niavaran Bldg.



SUMMARY

 

Assume $\mathcal{C}$ is the class of all linear orders $L$ such that $L$ is not a countable union of well ordered sets, and every uncountable subset of $L$ contains a copy of $\omega_1$. We show that $\mathcal{C}$ might have minimal elements which answers a question due to Galvin.

 




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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