#  Ocneanu's Magic Garden 

 



Canvas: <https://canvas.harvard.edu/courses/31194>  
Syllabus: [https://mathpicture.fas.harvard.edu/files/mathpicture/files/syllabus.pdf](/file_url/194)

Sort   ![Adrian with a few models](/sites/g/files/omnuum6611/files/styles/hwp_1_1__360x360_scale/public/mathpicture/files/screen_shot_2017-08-18_at_3.47.46_am.png?itok=Xs9cNp-6) 

 



   ![Adrian Ocneanu](/sites/g/files/omnuum6611/files/styles/hwp_1_1__360x360_scale/public/mathpicture/files/adrian90s.png?itok=LLPUGvZ2) 

 







*Left: Adrian Ocneanu in his office at Harvard in 2017.*  
*Right: This photo taken in 1999 shows Adrian holding Misner-Thorne-Wheeler in one hand, and some models in the other hand. He was celebrating the fact that he realized intertwiners, and coefficients like the 6j symbols, are made of a network of small permutohedra, in frames subject to Riemann curvature, namely gravity-like conditions.*  
  
In 2017, Professor Adrian Ocneanu, visiting from Penn State's mathematics department, taught a course introducing completely new work in higher representation theory. Cross-listed in Harvard's physics and mathematics departments, the course will cover the construction of higher (category) simple Lie groups, their roots, weights and representations, and Dynkin and Young diagrams - all encoded by discrete Riemann curvature.

Transcriptions of the course lectures are posted on this website. Videos can be obtained from A. Ocneanu.

**Relevant papers and talks**

A. Ocneanu, [The classification of subgroups of quantum SU(N)](https://cel.archives-ouvertes.fr/cel-00374414/document). In: *Bariloche* (Argentine), pp. 26, 2000.  
A. Ocneanu, [Chirality for operator algebras](https://tqft.net/web/projects/taniguchi/Chirality%20for%20operator%20algebras%20-%20Adrian%20Ocneanu%20-%20Subfactors%20(Kyuzeso,%201993)%2039-63%20-%20MR1317353.pdf). In: H. Araki, Y. Kawahigashi and H. Kosaki (eds.): *Subfactors*. pp. 39-63. World Scientiﬁc Publ., 1994.  
A. Ocneanu, [Operator algebras, topology and subgroups of quantum symmetry— construction of subgroups of quantum groups](https://tqft.net/other-papers/subfactors/Subgroups%20of%20Quantum%20Groups%20-%20Ocneanu.pdf). In: Taniguchi Conference on Mathematics Nara 1998, 235–263, *Adv. Stud. Pure Math.*, 31, Math. Soc. Japan, Tokyo, 2001.  
A. Ocneanu, [Paths on Coxeter diagrams: From platonic solids and singularities to minimal models and subfactors](https://www.researchgate.net/publication/248790709_Paths_on_Coxeter_diagrams_From_Platonic_solids_and_singularities_to_minimal_models_and_subfactors), (Notes by S. Goto) in “Lectures on operator theory”, *Fields Inst. Monographs* 13, Amer. Math. Soc., Providence, 1999.  
A. Ocneanu, [Quantized groups, string algebras and Galois theory for algebras](https://www.cambridge.org/core/books/operator-algebras-and-applications/quantized-groups-string-algebras-and-galois-theory-for-algebras/61DFE87D2B960EB9DDD1F7AE8BD9C5AD). In: *Operator algebras and applications*, Vol. 2, pp. 119-172, Cambridge Univ. Press, 1988.  
A. Ocneanu, [Quantum Subgroups and Higher McKay Correspondences](https://www.youtube.com/watch?v=TzsJ2WZN9do). Talk given at workshop "Generalized McKay Correspondences and Representation Theory", MSRI, Berkeley, 2006.

   ![Higher rep course poster](/sites/g/files/omnuum6611/files/styles/hwp_1_1__720x720_scale/public/mathpicture/files/hrt_poster.png?itok=5A6B2rfE) 

 



 

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 Attachments- [  picture\_as\_pdf  Syllabus ](/sites/g/files/omnuum6611/files/mathpicture/files/syllabus.pdf)
- [  picture\_as\_pdf  lecture\_1\_23.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_1_23.pdf)
- [  picture\_as\_pdf  lecture\_24\_20171025.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_24_20171025.pdf)
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- [  picture\_as\_pdf  lecture\_26\_20171030.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_26_20171030.pdf)
- [  picture\_as\_pdf  lecture\_27\_20171101.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_27_20171101.pdf)
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- [  picture\_as\_pdf  lecture\_31\_20171110.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_31_20171110.pdf)
- [  picture\_as\_pdf  lecture\_32\_20171113.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_32_20171113.pdf)
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- [  picture\_as\_pdf  lecture\_34\_20171117.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_34_20171117.pdf)
- [  picture\_as\_pdf  lecture\_35\_20171120.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_35_20171120.pdf)
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- [  picture\_as\_pdf  lecture\_42\_20171213.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/lecture_42_20171213.pdf)
 
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