Re: The Euler Equation - how to get clickable URLs

HOW TO GET CLICKABLE URLS
=========================

URLs mentioned in emails and newsgroups posts become automatically clickable with most reading software.

The URL ends of course with a blank character or at the end of the line. Special characters may end the URL prematurely, as the apostroph character does in http://en.wikipedia.org/wiki/Euler's_formula . The link seems broken.

By replacing ' with its hex representation %27 this character is no longer an obstacle, and one will get the complete correct URL for the Wikipedia article: http://en.wikipedia.org/wiki/Euler%27s_formula .

The same holds for parentheses and - I guess - many other special characters. This may depend on the software used and on the character encoding settings. Apparently the underscore is no obstacle in making the complete URL clickable.

The WWW browser shows up special characters in their %nn format in the URL antry field (*).
With Copy&Paste from this field one copies this complete URL to the email text. In this way the complete URL will become clickable at the receiver's end.

Anyhow, after so many years of advancements the good old paper ASCII table is still most useful.

(*) At least Netscape and Internet Explorer do so.

Johan E. Mebius


Timothy Murphy wrote:

>Anon wrote:
>
>
>>Roger Cotes found it first (sort of, in a different form).
>>
>>Ref to work by Cotes (from about 1714): "Harmonia Mensurarum",
>>published posthumously in 1722.
>>
>>"Harmonia Mensurarum, sive Analysis and Synthesis Per Rationum et
>>Angulgrum Mensuras", R. Cotes, Cambridge Opera Miscellanea, 1722
>>
>>For more, see
>>http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Cotes.html
>>http://www.mathpages.com/home/kmath192/kmath192.htm
>>http://en.wikipedia.org/wiki/Euler's_formula
>>
>>
>>Euler rediscovered the result, and proved it in a number of different
>>ways, three of which are given in the book (pages 93-96)
>>
>>"Euler, The Master of Us All" by William Dunham, ISBN 0883853280.
>
>
>That is interesting.
>What are the 3 proofs (in brief) as a matter of interest,
>for those of us without access to the book?
>
>Incidentally, I've always known this result as "de Moivre's Theorem".
>How did he get in the act?
>
>At least de Moivre only had one equation,
>while Euler had billions.
>
>
.

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