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I have started adding references to string field theory , in particular those by Jim Stasheff et al. on the role of L-infinity algebra and A-infinity algebra. Maybe I find time later to add more details.
added a bit to framed manifold
reformatted the entry group a little, expanded the Examples-section a little and then pasted in the group-related “counterexamples” from counterexamples in algebra. Mainly to indicate how I think this latter entry should eventually be used to improve the entries that it refers to.
Detection of the 21cm hydrogen absorption line expected in the CMB has been claimed now. Such a detection is thought to have implications for observational cosmology comparable in relevance to those of the recent gravitational wave detection. I have collected some original articles and reviews here in an otherwise empty entry hydrogen line
Expanded the formerly stubby article convex function, giving examples, properties, etc.
I have written a disordered article lacking information. No, wait! I mean, I have written an article on a measure of disorder and lack of information: entropy.
This is from a very mathematical perspective, but I have also tried to indicate how this connects to the physical notion of entropy. (This is something that I would like to understand better!)
added this pointer (hat tip to David C. here):
On the logical equivalence between the four-colour theorem and a statement about transition from the small N limit to the large N limit for Lie algebra weight systems on Jacobi diagrams via the ’t Hooft double line construction:
added pointer to today’s
I have reorganised set theory and spun off material set theory.
I keep having the need to point to something like mass gap problem. So now I created a stub for it, just so that the links works. Has to be expanded, clearly.
created a bare minimum at light-cone gauge quantization, just so as to be able to sensibly link to it from elsewhere
More propositions and stuff entered at bicategory of relations.