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School</video:title><video:description>https://logic.fudan.edu.cn/event2025/summer#Lecture2</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/ec5f3c00-f6fd-4595-84bb-40f40d33aef3/8a62dfdb-9141-415f-b043-008b08c698c1-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/vbVbDA2KcyYwiZavVaufVH</video:player_loc><video:duration>9371</video:duration><video:rating>0</video:rating><video:view_count>3</video:view_count><video:publication_date>2025-08-25T15:57:15.049Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/dhrVyHtnhVQDKc2hTuegRg</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/374986c4-930b-47ca-bb21-b55ea8e7ec9c.jpg</video:thumbnail_loc><video:title>Ben Castle: Strong Minimality and Geometric Stability Theory 5 - 2025 Fudan Logic Summer 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Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/9eFYLScvcHE7FaJwrwsNUT</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/0a0f42fc-a7d1-47b3-b48d-8703d0348515.jpg</video:thumbnail_loc><video:title>Joel D. Hamkins: Philosophy of Mathematics 01</video:title><video:description>https://jdh.hamkins.org/lecture-series-on-the-philosophy-of-mathematics/
https://logic.fudan.edu.cn/event2025/jdh</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/42b26a87-c56b-43c7-a0a4-918237bf0083/4196e723-9629-41c8-8b2a-b2944199d905-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/9eFYLScvcHE7FaJwrwsNUT</video:player_loc><video:duration>7773</video:duration><video:rating>0</video:rating><video:view_count>25</video:view_count><video:publication_date>2025-08-28T12:08:27.625Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/apU11Jiat9C8QT4zk49q8y</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/8cceb0e6-c88b-4da6-b847-da8129502aec.jpg</video:thumbnail_loc><video:title>Joel D. Hamkins: Philosophy of Mathematics 02</video:title><video:description>https://jdh.hamkins.org/lecture-series-on-the-philosophy-of-mathematics/
https://logic.fudan.edu.cn/event2025/jdh</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/4c3866a2-d4e4-44a9-bd9d-0c3c590a2d26/56cb6248-2b9e-4bf9-8cf8-0274a9bb5a90-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/apU11Jiat9C8QT4zk49q8y</video:player_loc><video:duration>8041</video:duration><video:rating>0</video:rating><video:view_count>3</video:view_count><video:publication_date>2025-08-28T13:55:59.380Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/kHEaPfrPo8T7y8E3avNcQV</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/20eb34fc-5174-4d23-901b-a8782962724c.jpg</video:thumbnail_loc><video:title>Joel D. Hamkins: Philosophy of Mathematics 03</video:title><video:description>https://jdh.hamkins.org/lecture-series-on-the-philosophy-of-mathematics/
https://logic.fudan.edu.cn/event2025/jdh</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/9faea6d7-858b-4713-9b5f-32cdcb458ec1/7950abdb-82b5-4a71-a8f2-639adb97c18d-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/kHEaPfrPo8T7y8E3avNcQV</video:player_loc><video:duration>7835</video:duration><video:rating>0</video:rating><video:view_count>2</video:view_count><video:publication_date>2025-08-28T16:37:26.732Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/2w823afmGunUnM7tstEy3k</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/9e1fb38c-8dcb-4973-ae7c-56d3e580f226.jpg</video:thumbnail_loc><video:title>Joel D. Hamkins: Philosophy of Mathematics 04</video:title><video:description>https://jdh.hamkins.org/lecture-series-on-the-philosophy-of-mathematics/
https://logic.fudan.edu.cn/event2025/jdh</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/0c4dc6d4-c73a-40ae-bcd3-bf7e795628a7/afcdbc2b-9f9e-4758-9888-aeb7a94988f4-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/2w823afmGunUnM7tstEy3k</video:player_loc><video:duration>7935</video:duration><video:rating>0</video:rating><video:view_count>2</video:view_count><video:publication_date>2025-08-28T19:04:05.121Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/3Q9au2KV1mfMqzNaQnM8Jy</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/6b6ac85e-76c3-4b54-a5de-e58825ea1e53.jpg</video:thumbnail_loc><video:title>Joel D. Hamkins: Philosophy of Mathematics 05</video:title><video:description>https://jdh.hamkins.org/lecture-series-on-the-philosophy-of-mathematics/
https://logic.fudan.edu.cn/event2025/jdh</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/16eb025c-2625-4421-a930-784a248bcf38/e7d702ce-e0d4-4de6-beff-f17272839bde-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/3Q9au2KV1mfMqzNaQnM8Jy</video:player_loc><video:duration>8232</video:duration><video:rating>0</video:rating><video:view_count>1</video:view_count><video:publication_date>2025-08-28T21:33:32.389Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/xbzR4P3R7ozouQgCiwxB98</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/d5faa4a1-c98f-471d-a575-548b521026fc.jpg</video:thumbnail_loc><video:title>Joel D. Hamkins: Philosophy of Mathematics 06</video:title><video:description>https://jdh.hamkins.org/lecture-series-on-the-philosophy-of-mathematics/
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https://logic.fudan.edu.cn/event2025/jdh</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/b61186e9-867a-4495-907e-930cf9ead79e/baa3b201-e8ba-45d8-aeb0-a86998ec5d76-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/otZr9vqJnfycZbZcc49nah</video:player_loc><video:duration>8267</video:duration><video:rating>0</video:rating><video:view_count>3</video:view_count><video:publication_date>2025-08-29T02:31:37.217Z</video:publication_date><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/6tAEJRhsyZyVZ996sowQLn</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/8203d296-4468-46f4-9dbb-15e7547bff37.jpg</video:thumbnail_loc><video:title>Fudan Logic Student Seminar: The Coding Conception of Set 01, 陈俊宏 CHEN, Junhong</video:title><video:description>Speaker: 陈俊宏 CHEN, Junhong
Time: 13:30 - 15:00, March 20, 2026.
Location: HGW2403.

Title: The Coding Conception of Set

Abstract: This report focuses on a new Conception of Set developed in current research. This Conception takes ordinals as prior to sets and maintains that set theory ought to be regarded as a consequence of ordinal theory. Specifically, we argue that ZFGC is in fact a true first-order ordinal theory, while the true second-order ordinal theory admits three possible directions of divergence. Each of these directions offers a distinct prediction concerning the shape of the true set-theoretic universe: the ZFGC2 single universe, the countabilist single universe, and a new maximal single universe constructed from a multiverse perspective, which we refer to as the coding multiverse. By conducting technical derivations on the potential of the strengthened theories associated with these three possible directions, combined with philosophical arguments, we demonstrate that the third type of universe is sufficiently justified to be accepted, thereby proposing a new set-theoretic worldview. Finally, we briefly outline prospects for the possible Gödel Program within this worldview.</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/2c5823d3-ad22-40bc-b078-0484eada6c5d/8153f595-df9e-4a23-a434-47d795e0f5e4-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/6tAEJRhsyZyVZ996sowQLn</video:player_loc><video:duration>3256</video:duration><video:rating>0</video:rating><video:view_count>27</video:view_count><video:publication_date>2026-03-21T15:30:12.929Z</video:publication_date><video:tag>Logic</video:tag><video:tag>Fudan Logic Student Seminar</video:tag><video:tag>Set theory</video:tag><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/7GHWKiZ7kahpJjo4DYRCDc</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/e4063caf-8264-43d0-bd87-661a2dc495ff.jpg</video:thumbnail_loc><video:title>Fudan Logic Student Seminar: The Coding Conception of Set 02, 陈俊宏 CHEN, Junhong</video:title><video:description>Speaker: 陈俊宏 CHEN, Junhong
Time: 13:30 - 15:00, March 20, 2026.
Location: HGW2403.

Title: The Coding Conception of Set

Abstract: This report focuses on a new Conception of Set developed in current research. This Conception takes ordinals as prior to sets and maintains that set theory ought to be regarded as a consequence of ordinal theory. Specifically, we argue that ZFGC is in fact a true first-order ordinal theory, while the true second-order ordinal theory admits three possible directions of divergence. Each of these directions offers a distinct prediction concerning the shape of the true set-theoretic universe: the ZFGC2 single universe, the countabilist single universe, and a new maximal single universe constructed from a multiverse perspective, which we refer to as the coding multiverse. By conducting technical derivations on the potential of the strengthened theories associated with these three possible directions, combined with philosophical arguments, we demonstrate that the third type of universe is sufficiently justified to be accepted, thereby proposing a new set-theoretic worldview. Finally, we briefly outline prospects for the possible Gödel Program within this worldview.</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/36466e7e-2502-47ae-9b4d-5c6320d47a85/36fd75fb-36f3-45f8-b2af-55c08959b550-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/7GHWKiZ7kahpJjo4DYRCDc</video:player_loc><video:duration>2437</video:duration><video:rating>0</video:rating><video:view_count>1</video:view_count><video:publication_date>2026-03-21T15:21:57.571Z</video:publication_date><video:tag>Logic</video:tag><video:tag>Fudan Logic Student Seminar</video:tag><video:tag>set theory</video:tag><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic Fudan</video:uploader><video:live>NO</video:live></video:video></url><url><loc>https://tube.yangruizhi.cyou/w/47erQfSFSacLdLGQiyVVFh</loc><video:video><video:thumbnail_loc>https://tube.yangruizhi.cyou/lazy-static/thumbnails/8a1e4747-d2ce-4c39-94f9-42bd2cdc11fb.jpg</video:thumbnail_loc><video:title>Jan Dobrowolski: Some applications of model theory to algebraic combinatorics 01</video:title><video:description>https://logic.fudan.edu.cn/event2026/summer#Lecture1</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/192a2a23-d865-48b7-89ae-b9d24f1a6942/eab1d60a-5aa8-405e-b552-71c4ec6e8443-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/47erQfSFSacLdLGQiyVVFh</video:player_loc><video:duration>4422</video:duration><video:rating>0</video:rating><video:view_count>10</video:view_count><video:publication_date>2026-08-17T10:46:58.207Z</video:publication_date><video:tag>mathematical 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02</video:title><video:description>https://logic.fudan.edu.cn/event2026/summer#Lecture1</video:description><video:content_loc>https://tube.yangruizhi.cyou/static/streaming-playlists/hls/f9efe8e2-3767-46a1-823b-adcd0a60429b/c752116d-ba4c-4cfe-b05a-2c6b08d4ce57-master.m3u8</video:content_loc><video:player_loc>https://tube.yangruizhi.cyou/videos/embed/wS5a4KeqHgPpU4yyVxogBi</video:player_loc><video:duration>4697</video:duration><video:rating>0</video:rating><video:view_count>2</video:view_count><video:publication_date>2026-08-18T13:54:19.979Z</video:publication_date><video:tag>Jan Dobrowolski</video:tag><video:tag> mathematical logic</video:tag><video:tag>model theory</video:tag><video:tag>summer school</video:tag><video:family_friendly>YES</video:family_friendly><video:uploader info="https://tube.yangruizhi.cyou/c/logic_fudan/videos">Logic 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