25/ or (b) approach it in the limit, by probabalistically self-cancelled the error out? I don't know. ...but I'd like to learn.
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Replying to @MorlockP
ⓘ Dogs don't have thumbs Retweeted Honktrain
26/ Yes, watched his entire brass clock video, and intend to build one myself someday (retirement?)https://twitter.com/Nitetrain_1/status/859036462398021633 …
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Replying to @MorlockP
ⓘ Dogs don't have thumbs Retweeted nzc
27/ This is an excellent analogy!https://twitter.com/ngvrnd/status/859037291125329921 …
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Replying to @MorlockP
29/ Anyway, that's been a guided tour of what it's like inside my head. Hope the rest of your day is less spergy.
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ⓘ Dogs don't have thumbs Retweeted ⓘ Dogs don't have thumbs
30/ I may have 90% answered my own question at the very beginning.https://twitter.com/MorlockP/status/859033195307835392 …
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Replying to @MorlockP
31/ So we know how to create a straight edge ( f = g = h). Given a cylinder (which is easy to boostrap bc a lathe takes a form and ...
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Replying to @MorlockP
32/ generates the three dimensional revolution of it, i.e. straight edge -> cylinder or cone), we can wrap straight edge onto the cylinder
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Replying to @MorlockP
33/ and it's an elementary geometric proof that the angle that the edge makes vs circumference A is the same angle it makes vs circumf B
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34/ bc the circumference at point A is a parallel line to the circumference at point B (non Euclidean space, obviously!)
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35/ to whit, the old "a line that intersects paralllel lines creates corresponding angles" proof (not axiom?) http://www.mathnstuff.com/math/spoken/here/2class/260/trans.htm …
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Replying to @MorlockP
36/ which still holds in the simple non Euclidean space we're talking about.
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37/ So we can create the thread pitch we want with simple compass work (bisection is legal, trisection is not), but we can also get 60°
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