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Re: FindRoots?

• To: mathgroup at smc.vnet.net
• Subject: [mg112245] Re: FindRoots?
• From: Andrzej Kozlowski <akozlowski at gmail.com>
• Date: Mon, 6 Sep 2010 04:42:15 -0400 (EDT)
• References: <201009031010.GAA26297@smc.vnet.net> <DA40379B-B509-4C55-B575-071F91F1021A@gmail.com> <CBE6A14D-39E3-4A2C-AEA3-ACAD9CEDFE7E@uniud.it>

On 5 Sep 2010, at 20:10, Gianluca Gorni wrote:

>
> On 03/set/2010, at 18.57, Andrzej Kozlowski wrote:
>
>>
>> On 3 Sep 2010, at 12:10, Gianluca Gorni wrote:
>>
>>>
>>> Reduce[2 x + Log[-((-1 + 2 x)/(-1 + 2 x^2))] ==== 0 && -2 <
>>> x < -1/Sqrt[2], x, Reals]
>>> False
>>
>> You seem to be using === instead of == which is a very basic error. In fact
>>
>>
>> What are these ==== doing in your code? I don't think they could have been in it when you run it?
>
> Hi Andrzei!
>
> I had made copy-and-paste from Mathematica to Mail,
> and my original message had the correct double "==".
> The incorrect "====" must have crept in during
> transmission, I wonder where. How is this message
> showing up on your side?
>
> Best regards,
> Gianluca Gorni
>

I think the problem is caused by the MathGroup mail server. It seems 
that when you send a post to the MathGroup with an equality sign the 
same post is sent to other MathGroup users with the equality sign 
doubled. In other words = is replaced by ==. This is very 
inconvenient because it means that a lot of code when pasted into 
Mathematica will turn into nonsense. The problem is clearly on the 
server side and I don't think that we can do anything about it. I don't 
know how long it has existed as I have not been very active in the 
MathGroup recently and I only noticed it because of your post.

[I have checked the raw emails that came into my mailbox and I 
saw  ======== in the mail instead of ===.   My server is not
doing anything to the posts as far as I can see.  Note that
the posts come with "=" as hex 3D and other hex codes instead
of ASCII.  This may be the problem with some server before
it gets to me - Moderator]


Andrzej

• References:
  • Re: FindRoots?
    • From: Gianluca Gorni <gianluca.gorni@uniud.it>