Re: [lojban] Direction of Rotation

[Jonathan Jones <eyeonus@gmail.com>]

On Sat, Aug 11, 2012 at 2:08 AM, Escape Landsome <escaaape@gmail.com> wrote:

>> "In a mathematical sense, a circle defined parametrically in a positive
>> Cartesian
>> plane<http://en.wikipedia.org/wiki/Cartesian_coordinate_system#Orientation_and_.22handedness.22>by
>> the equations
>> *x* = cos *t* and *y* = sin *t* is traced counterclockwise as *t*
>> increases
>> in value."
>>
>> That's pure math right there.

Well, that's Wikipedia maths.

In University and Ecole Normale, we are taught tensor algebra, which
clearly states that the notion of clockwise and counterclockwise is
arbitrary.   If the only thing you can oppose to me is a commonplace
cyclopedia collected by amateurs, and not the works of high-status
mathematicians, then I consider you have contributed no critique at
all.

Buy a book of high grade mathematics, and come back later.

Your tone is dismissive and inflammatory, serves no useful or beneficial purpose to anyone including yourself, and merely provokes a response to be equally dismissive of you /in general/.

It doesn't matter what "grade" of math is being used. (And by the way, it's not "Wikipedia maths". It's a parametric equation, which is calculus. The fact that I found it on Wikipedia is incidental.) You asked for a purely mathematical way of describing rotational motion that distinguishes counter- and clock-wise directions. I have done so.

-- 
mu'o mi'e .aionys.

.i.e'ucai ko cmima lo pilno be denpa bu .i doi.luk. mi patfu do zo'o
(Come to the Dot Side! Luke, I am your father. :D )

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