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242:{\displaystyle k\langle x_{1},\dots ,x_{n}\rangle /(x_{i}x_{j}-q_{ij}x_{j}x_{i})}
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Rogalski, D (2014). "An introduction to
Noncommutative Projective Geometry".
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321:Ajitabh, Kaushal (1994),
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293:See also
32:Examples
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360:arXiv
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