i_speak_softly: (Crud)
i_speak_softly ([personal profile] i_speak_softly) wrote 2012-10-19 02:30 am (UTC)

[Maybe Don should start with that subject, then. But how to draw it without the result being horribly misinterpreted?]

[After some consideration, he sketches a series of graphs and formulas representing skew lines and tangents. Please think abstractly about this, Robert...]
(729 comments)

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