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Subject: Re: [lojban] Direction of Rotation
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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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<div class=3D"gmail_quote">On Sat, Aug 11, 2012 at 2:08 AM, Escape Landsome=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:escaaape@gmail.com" target=3D"_bla=
nk">escaaape@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex">
<div class=3D"im">&gt;&gt; &quot;In a mathematical sense, a circle defined =
parametrically in a positive<br>
&gt;&gt; Cartesian<br>
&gt;&gt; plane&lt;<a href=3D"http://en.wikipedia.org/wiki/Cartesian_coordin=
ate_system#Orientation_and_.22handedness.22" target=3D"_blank">http://en.wi=
kipedia.org/wiki/Cartesian_coordinate_system#Orientation_and_.22handedness.=
22</a>&gt;by<br>

&gt;&gt; the equations<br>
&gt;&gt; *x* =3D cos *t* and *y* =3D sin *t* is traced counterclockwise as =
*t*<br>
&gt;&gt; increases<br>
&gt;&gt; in value.&quot;<br>
&gt;&gt;<br>
&gt;&gt; That&#39;s pure math right there.<br>
<br>
</div>Well, that&#39;s Wikipedia maths.<br>
<br>
In University and Ecole Normale, we are taught tensor algebra, which<br>
clearly states that the notion of clockwise and counterclockwise is<br>
arbitrary. =A0 If the only thing you can oppose to me is a commonplace<br>
cyclopedia collected by amateurs, and not the works of high-status<br>
mathematicians, then I consider you have contributed no critique at<br>
all.<br>
<br>
Buy a book of high grade mathematics, and come back later.</blockquote></di=
v><br>Your tone is dismissive and inflammatory, serves no useful or benefic=
ial purpose to anyone including yourself, and merely provokes a response to=
 be equally dismissive of you /in general/.<br>
<br>It doesn&#39;t matter what &quot;grade&quot; of math is being used. (An=
d by the way, it&#39;s not &quot;Wikipedia maths&quot;. It&#39;s a parametr=
ic equation, which is calculus. The fact that I found it on Wikipedia is in=
cidental.) You asked for a purely mathematical way of describing rotational=
 motion that distinguishes counter- and clock-wise directions. I have done =
so.<br clear=3D"all">
<br>-- <br>mu&#39;o mi&#39;e .aionys.<br><br>.i.e&#39;ucai ko cmima lo piln=
o be denpa bu .i doi.luk. mi patfu do zo&#39;o<br>(Come to the Dot Side! Lu=
ke, I am your father. :D )<br><br>

<p></p>

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To post to this group, send email to lojban@googlegroups.com.<br />
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For more options, visit this group at http://groups.google.com/group/lojban=
?hl=3Den.<br />



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