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May 11, 2021 at 21:08 comment added Sean Tilson I thought Boardman and Vogt talked about weak Kan complexes, no? That was written before 1991. Although perhaps people don't appreciate that book. Dylan, want my netflix password? After this I would buy you a ticket to a film myself if I thought theaters were open.
Feb 10, 2019 at 21:37 history edited Peter May CC BY-SA 4.0
Answers comments and adds a bit of math.
Feb 9, 2019 at 6:37 comment added Dan Ramras Actually, in the last paragraph of his 3-page paper, I see that Elmendorf says that there's a different choice for the adjoint pair $(\Omega^\infty, \Sigma^\infty)$ in which 5) holds but 3) fails. Somehow the key underlying weirdness of S-modules, I think, is that the unit for the smash product is not cofibrant.
Feb 9, 2019 at 6:28 comment added Harry Gindi @DanRamras Neat, thanks!
Feb 9, 2019 at 6:24 comment added Dan Ramras @HarryGindi Elemndorf wrote a paper about this: 5) fails. See books.google.com/…
Feb 9, 2019 at 5:42 comment added Harry Gindi Professor May, which one of these five properties was violated by EKMM (or simplicial symmetric spectra)? Only the on-the-nose symmetry of the smash product?
Feb 9, 2019 at 4:57 comment added Mike Shulman Would you say that it was known even at the time of Lewis's theorem that "there is no corresponding contradiction in the $\infty$-category world", at least in some informal sense predating formal definitions of "$\infty$-category"? Or did that realization emerge later?
Feb 9, 2019 at 4:54 history edited Mike Shulman CC BY-SA 4.0
Change backquotes to ordinary ones (backquotes cause tt font)
Feb 9, 2019 at 3:34 comment added Emily Thank you very much for your illuminating answer!
Feb 9, 2019 at 3:34 vote accept Emily
Feb 9, 2019 at 3:25 comment added Dylan Wilson Of course I agree that $\infty$-categorical concepts differ from their point-set counterparts- and that Lewis's theorem is indeed a theorem ;) I was just answering the question that was asked! And alright, I'll get off the toy... but it's the weekend! Can I at least watch a movie or something?
Feb 9, 2019 at 3:00 history answered Peter May CC BY-SA 4.0