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Three Pairs of Mutually Perpendicular Lines -- Not a Very Generic Case. (arXiv:2011.05327v1 [math.CO]) http://arxiv.org/abs/2011.05327
Three Pairs of Mutually Perpendicular Lines -- Not a Very Generic Case. (arXiv:2011.05327v1 [math.CO]) http://arxiv.org/abs/2011.05327