Recent and upcoming talks by Asaf Karagila

Asaf Karagila: Fodor’s lemma can fail at every cardinal

HUJI Logic Seminar The next meeting of the Logic Seminar will take place in next Wednesday, 14/12, Ross Building 70, 16:00 — 18:00. Speaker: Asaf Karagila Title: Fodor’s lemma can fail at every cardinal Abstract. continue reading…

Asaf Karagila: Restrictions on forcings that change cofinalities

Friday Set Theory Seminar (HUJI) We shall meet this Friday (June 26th) in the Hebrew University math department building in Room 110, at 10 am. Speaker: Asaf Karagila (HUJI) Title: Restrictions on forcings that change cofinalities Abstract: Given a regular cardinal kappa, we want to know what sort of “nice” properties a forcing can have while making kappa singular. continue reading…

Asaf Karagila: Finite Width of the Cardinals Implies Choice.

  Shalom, The next meeting of the seminar in Logic, Set Theory  and Topology will be held on Tuesday, November 13. Time is 16:00 – 17:30. Place: seminar room 201 which is located in the building of Computer Science Department (not Math Dept) Speaker :Asaf Karagila (HUJI) Title: Finite Width of the Cardinals Implies Choice. continue reading…

Asaf Karagila: On the ordering of cardinals without choice.

Shalom, The next meeting of the seminar in Logic, Set Theory  and Topology will be held on Tuesday, November 6. Time is 16:00 – 17:30. Place: seminar room 201 which is located in the building of Computer Science Department (not Math Dept) Speaker :Asaf Karagila (BGU) Title: On the ordering of cardinals without choice. continue reading…

Asaf Karagila: Forcing and Symmetric extensions, part II

Shalom, We hold seminar on Tuesday , June 5, time 16:00-17:30, seminar room: 201. Speaker: Asaf Karagila (BGU) Title: Forcing and Symmetric Extensions, part II Abstract: Continuing from last week, we will discuss automorphism of forcings and define what are symmetric models and how they are used to create models negating the axiom of choice. continue reading…

Asaf Karagila: Forcing and Symmetric extensions, part I

Shalom, We hold seminar on Tuesday , May 29, time 16:00-17:30, seminar room: 201. Speaker: Asaf Karagila (BGU) Title: Forcing and Symmetric extensions, part I Abstract: We will review the methods of forcing for proving independence results in set theory. continue reading…

Asaf Karagila: Some more about Cohen’s first model

Shalom We held seminar on Tuesday , May 15, time 16:00-17:30, seminar room: 201. Speaker: Asaf Karagila (BGU) Title: Some more about Cohen’s first model   continue reading…

Asaf Karagila: Horrors in topology, when N is not Lindelof!

Shalom, We held seminar on Tuesday , May 8, time 16:00-17:30, seminar room: 201. Speaker: Asaf Karagila (BGU) Title: Horrors in topology, when N is not Lindelof! Abstract: We will discuss a bit of the horrors of topology when the axiom of choice is on vacation. continue reading…