![Joel David Hamkins : The hierarchy of second-order set theories between GBC and KM and beyond - YouTube Joel David Hamkins : The hierarchy of second-order set theories between GBC and KM and beyond - YouTube](https://i.ytimg.com/vi/qrphJDYPq70/maxresdefault.jpg)
Joel David Hamkins : The hierarchy of second-order set theories between GBC and KM and beyond - YouTube
![PDF] REFLECTION IN SECOND-ORDER SET THEORY WITH ABUNDANT URELEMENTS BI-INTERPRETS A SUPERCOMPACT CARDINAL | Semantic Scholar PDF] REFLECTION IN SECOND-ORDER SET THEORY WITH ABUNDANT URELEMENTS BI-INTERPRETS A SUPERCOMPACT CARDINAL | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/639bf7b7125e927bc4c76cccf34efc7b2efa1f72/31-Figure2-1.png)
PDF] REFLECTION IN SECOND-ORDER SET THEORY WITH ABUNDANT URELEMENTS BI-INTERPRETS A SUPERCOMPACT CARDINAL | Semantic Scholar
![Joel David Hamkins on X: "My PhD student, Bokai Yao @BokaiYao, has just passed his dissertation defense, defending the thesis, "Set theory with urelements", in which he establishes and separates a surprisingly Joel David Hamkins on X: "My PhD student, Bokai Yao @BokaiYao, has just passed his dissertation defense, defending the thesis, "Set theory with urelements", in which he establishes and separates a surprisingly](https://pbs.twimg.com/media/Fr1h1_2WcAM_c0y.jpg)
Joel David Hamkins on X: "My PhD student, Bokai Yao @BokaiYao, has just passed his dissertation defense, defending the thesis, "Set theory with urelements", in which he establishes and separates a surprisingly
![Second Order Differential Equations: Special Functions and Their Classification: Kristensson, Gerhard: 9781441970190: Amazon.com: Books Second Order Differential Equations: Special Functions and Their Classification: Kristensson, Gerhard: 9781441970190: Amazon.com: Books](https://m.media-amazon.com/images/I/61oKCcIvJaL._AC_UF1000,1000_QL80_.jpg)
Second Order Differential Equations: Special Functions and Their Classification: Kristensson, Gerhard: 9781441970190: Amazon.com: Books
![Categorical large cardinals and the tension between categoricity and set- theoretic reflection | Joel David Hamkins Categorical large cardinals and the tension between categoricity and set- theoretic reflection | Joel David Hamkins](https://jdh.hamkins.org/wp-content/uploads/Categorical-cardinals-Venn-diagram.jpg)
Categorical large cardinals and the tension between categoricity and set- theoretic reflection | Joel David Hamkins
![The surprising strength of second-order reflection in urelement set theory, Luminy, October 2023 | Joel David Hamkins The surprising strength of second-order reflection in urelement set theory, Luminy, October 2023 | Joel David Hamkins](http://jdh.hamkins.org/wp-content/uploads/Bi-interpretation-KMU-AAA-with-supercompact.jpg)