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Re: about the use of button

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115371] Re: about the use of button
  • From: Syd Geraghty <sydgeraghty at me.com>
  • Date: Sun, 9 Jan 2011 02:18:54 -0500 (EST)

Hi Steve,

[As far as I can tell, your post has no issues.  Take a look and see
 if you see anything wrong. -- Steve C. Moderator]

You may want a few samples from other sources to solve the mysterious equals proliferation:

1,2,3,equals:

=

==

===

Mathematica expressions with equals (I give results as well so you can check output easily):

s = NDSolve[{y'[x] == y[x] Cos[x + y[x]], y[0] == 1}, y, {x, 0, 30}]

{{y->InterpolatingFunction[{{0.,30.}},<>]}}

Reduce[x^2 + 3 x == 2, x]

x < 1/2 (-3 - Sqrt[17]) || x > 1/2 (-3 + Sqrt[17])

x == \[Pi]/2 || (5 \[Pi])/6 <= x <= \[Pi] || (3 \[Pi])/2 <= x <= (
  11 \[Pi])/6 || x == (5 \[Pi])/2 || (17 \[Pi])/6 <= x <= 3 \[Pi]

{x, y} = N[{1, 2}, 20];
While[x != y, {x, y} = {(x + y)/2, Sqrt[x y]}]; x

1.4567910310469068692

Eliminate[{x == 2 + y, y == z}, y]

2 + z == x

My system info is below:-

Whilst on this topic do other people see a lot of strange character errors/misinterpretations as in the following example? I seem to get a lot!

"Philipp Wei=C3=9Fgraeber"

Cheers .... Syd

Syd Geraghty B.Sc, M.Sc.

sydgeraghty at mac.com

Mathematica 8.0 for Mac OS X x86 (64-bit) (November 6, 2010)
MacOS X V 10.6.5 Snow Leopard 
MacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM

On Jan 7, 2011, at 1:07 AM, Andrzej Kozlowski wrote:

> [Note, we can try an experiment Andrzej.  Send me a test email with
> various combinations of =, ==, etc in and out of Mathematica expressions.
> We will see how they arrive and what they look like after I run my
> various processing scripts on them to see where the extra ='s come
> from if possible. --  Steve C.]



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