https://www.princetonreview.com/academic-tutoring/tutor/xiang%20w--10633278
Schedule an online tutoring session with Xiang W. to learn Algebra and Algebra 2 online. Read reviews, see more subjects Xiang W. tutors and schedule a session.
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https://www.arxiv.org/abs/1012.4468
Abstract page for arXiv paper 1012.4468: From SO/Sp instantons to W-algebra blocks
w algebraspinstantonsblocks