stevenvh
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 Sep 24 comment Types of infinity Thanks. Does this also mean that the cardinalities of all classes which include the class of infinities are equal, and greater than the cardinalities of all classes which don't include the class of infinities? Sep 24 asked Types of infinity Sep 22 comment If $x=1$, then its powers end with $1$ I don't think OP knows about modular arithmetic... Sep 14 comment Why is $e^{\pi \sqrt{163}}$ almost an integer? accepted as answer for explaining how some numbers approach integers, albeit with a completely different example. I understand Rumanujan's Constant is way beyond my understanding of mathematics. Sep 14 accepted Why is $e^{\pi \sqrt{163}}$ almost an integer? Sep 13 comment How do I map a spherical triangle to a plane triangle? Maybe also interesting for gis.stackexchange.com? Sep 13 asked Why is $e^{\pi \sqrt{163}}$ almost an integer? Sep 13 revised sangaku - a geometrical puzzle deleted 59 characters in body Sep 13 comment sangaku - a geometrical puzzle This is the approach I followed too, but I had some trouble finding a second equation to get rid of the theta :-( Sep 13 comment sangaku - a geometrical puzzle accepted as answer for indeed looking nicer than your other solution. Sep 13 accepted sangaku - a geometrical puzzle Sep 12 revised sangaku - a geometrical puzzle edited title; added 15 characters in body Sep 12 revised sangaku - a geometrical puzzle added 79 characters in body Sep 12 asked sangaku - a geometrical puzzle Sep 12 revised Boy Born on a Tuesday - is it just a language trick? added 12 characters in body Sep 12 comment Boy Born on a Tuesday - is it just a language trick? @muad: there doesn't seem a mistake in your derivation; the error was in my intuition that the day couldn't possibly have anything to do with it. Sep 12 revised Boy Born on a Tuesday - is it just a language trick? added 209 characters in body Sep 11 comment Do complex numbers really exist? "When you first hear this, it sounds crazy." I must say, when I first saw it being drawn in the Argand plane, it made perfectly sense to me: you introduce an imaginary axis because your imaginary number obviously can fit nowhere on the real axis. If you say i = 1 rotated CW over 90°, then i*i = 1 rotated over 2*90°, and you've arrived at -1, back on the real axis! The Argand plane made it all clear to me. Unfortunately I have no such representation for quaternions :-( Sep 11 answered Do complex numbers really exist? Sep 11 comment Liouville's number revisited I guess I should have said "Liouville's constant" instead of "Liouville's number".