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ww rouse ball has a tendency to write eloquently but without succinctness -- perhaps someone could trim this article to make room for more interesting information about this man's life? since it is taken from a book about the history of mathematics there is no mention of his music. yet the length of the article makes it appear to have sufficiently covered his life, which is of course not true.
Any word on his system he devised to teach deaf mutes? It was the first you know..No this is disputed William Holder, or even John Bulwer (who wrote about establishing an academy for the deaf in 1648) could have been first.
Times challenge on his code-breaking
See here for an article on his contribution to breaking French codes and a Times challenge to rebreak them - since Wallis failed to leave a description of the method he used.
Malick78 (
talk)
07:47, 11 April 2009 (UTC)reply
Moved anonymous comments from article
To the authors: Thank you for a very educational article on John Wallis. I want to point out that your expression of Wallis's product is probably going to be misleading because of the numerator not quite seeming to keep up with the denominator. Note that if you express your representation of the product as (2/3)^2 (4/5)^2 (6/7)^2 ..., every term will be less than 1, resulting in a product that is less than 1, which pi/2 is not. In fact, this product approaches zero if it is continued indefinitely. I do not know how Wallis himself expressed the product. However, I have seen it expressed as something like this
.
This significantly differs from your expression only in that it avoids squaring the last odd integer in the denominator. I'm sure that it will be helpful to some readers to align the numerator and denominator in the expression so that one of each of the two even integers in the numerator hovers directly over one odd integer that is one greater than itself and one that is one less.
It's not just a matter of alignment, but of ill-defined limits. Obviously one cannot form the diverging products of numerator and denominator and then divide the two infinities. So it is essential that divisions are performed first, and the product is one of (infinitely many) fractions. I've just fixed that.
Marc van Leeuwen (
talk)
16:24, 14 April 2010 (UTC)reply
Making sense of the Integral calculus section
It seems to me some things have gone wrong in the
integral calculus section.
"he was unacquainted with the binomial theorem, he could not effect the quadrature of the circle" seems nonsensical. Since Wallis was capable of integrating for he was most likely in particular aware of the binomial theorem for integer exponents (at least small ones), which was well known around the time (and Pascal had just published his Traité du triangle arithmétique in 1653). What Wallis did not know however was the generalized binomial formula for fractional exponents (notably for 1/2). And all this is not about the quadrature of the circle, just about computing its area,
"Wallis argued, we have in fact a series 1, 1⁄61⁄30, 1⁄140,..." But those numbers were from a different problem rather than
The text seems to be in part copied literally (except for some transcription errors) from the
Online Encyclopedia (although that text breaks off with "[ <-- This needs a lot of work! ] " It is not so clear what has gone on here (and I dont have "A Short Account of the History of Mathematics by W. W. Rouse Ball (4th Edition, 1908)" which the latter text claims as (public domain) source), but it makes me uncomfortable (and the current WP article acknowledges nothing).
The Rouse Ball material will be public domain, because of the date. These days we ask that direct copying should be acknowledged under a heading in the External links section (I use the semi-colon indent to make such headings - there is no need for a subsection). But, from the point of view of the article, it would be better to report what
W. W. Rouse Ball said: e.g. "in Rouse Ball's opinion, Wallis used an interpolation argument because the binomial theorem was not available to him".
Charles Matthews (
talk)
18:23, 14 April 2010 (UTC)reply
Resigned fellowship because of Marriage?
Wallis was elected to a fellowship at Queens' College, Cambridge in 1644, which he however had to resign following his marriage on 14 March 1645 to Susanna Glyde
Why did he have to resign? Was it a rule surviving from Catholic traditions that fellows have to be celibate? Or was it due to purely technical difficulties having to do e.g. with moving to live elsewhere?
Thus, as the ordinate of the circle is the
geometrical mean between the ordinates of the curves and , it might be supposed that, as an approximation, the area of the semicircle which is might be taken as the geometrical mean between the values of
that is, 1 and ; this is equivalent to taking or 3.26... as the value of π.
So far so good.
But, Wallis argued, we have in fact a series ... and therefore the term interpolated between 1 and ought to be chosen so as to obey the law of this series
But there we have the integral of (x - x^2)^p whereas here we have the integral of (1 - x^2)^p. There is some confusion here between computing the area of a quarter circle with radius 1 and the area of a half-circle with radius 1/2.
Top.Squark (
talk)
12:53, 23 July 2010 (UTC)reply
Van Heuraët's method
He [van Heuraet] supposes the curve to be referred to rectangular axes; if this be so, and if (x, y) be the coordinates of any point on it, and n be the length of the normal...
Unclear. What is the "length of the normal"? The normal is a vector orthogonal to the curve, that is, orthogonal to its tangent. It is usually taken either of unit or of arbitrary length.
I believe this will refer to the Descartes method, which is basically to find the circle touching the curve (so resting on the tangent), which comes down to saying that "the" normal would be the radius vector from the point to the centre of that circle. Rouse Ball talks about this.
[1]. I think that because
this page is about the original book of Van H, and describes his method as coming from the Descartes normal method and
Hudde's rules. This all should probably be in
arc length rather than this article.
Charles Matthews (
talk)
21:26, 10 July 2010 (UTC)reply
Doesn't seem to make sense. For example ds : dx = n : y can't hold since for a straight line n is infinite. Also, I don't understand the relevance of
W. W. Rouse Ball who was only born about 200 years later.
Top.Squark (
talk)
14:44, 24 July 2010 (UTC)reply
Wallis and Thabit Ibn Qurra
He [Wallis] is usually credited with the proof of the Pythagorean theorem using similar triangles. However, Thabit Ibn Qurra (AD 901), an Arab mathematician, had produced a generalization of the Pythagorean theorem applicable to all triangles 6 centuries earlier. It is a reasonable conjecture that Wallis was aware of Thabit's work
Does it mean that Wallis' proof was similar / based on Thabit's proof?
In the introduction to the article, John Wallis is credited with introducing the symbol ∞ for infinity, but there is no further mention of this in the body of the article. I found that he defined the symbol for infinity in his Treatise on the Conic Sections, which was published in 1656. In his paper, he wrote : "(let the altitude of each one of these be an infinitely small part, of the whole altitude, and let the symbol ∞ denote Infinity)". I have added this to the body of the article under the Analytical Geometry section. —Preceding
unsigned comment added by
Tmancarella635 (
talk •
contribs)
20:12, 5 December 2010 (UTC)reply
Concerning John Wallis' article and the fact it may need a cleanup to meet Wikipedia's quality standards, I would like to say that: as proved by
Amir Alexander[1], Wallis wasn't only and mainly an "experimental" mathematician, but he was also a man of his times (an ecclesiastic and a politician member of parliament) during a dark period for the sixteenth century science. His appointment as professor of mathematics was mainly political: at that point his knowledge of
mathematics was definitively insufficient to hold the position. You have to keep this into consideration dear wiki friends.
Mgvongoeden (
talk)
13:32, 29 December 2015 (UTC)reply
Notes
^Amir Alexander (2014). Infinitesimal: How a Dangerous Mathematical Theory Shaped the Modern World. Scientific American / Farrar, Straus and Giroux.
ISBN978-0374176815.
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The "clergyman and" and the category that I added (
[2]) were based on other parts of the article. According to the references, part of the article was derived from
[3], which says that he took orders (see
Holy Orders), so please don't remove "clergyman and." If you don't think the Westminster category should be there, please also remove its mention from the text.
208.95.51.38 (
talk)
13:06, 27 October 2017 (UTC)reply
The addition of the descriptor clergyman is trivial and irrelevant, and is not appropriate for the lede which is meant to summarize the major features of the article. Of course Wallis took Holy Orders, as all Fellows of colleges were required to do. There is no evidence for notability for his work as a clergyman (as there is, for example, in the case of
Jeremy Taylor). Wallis is famous for his work as a mathematician. I have transferred this thread from my talk page to the Wallis talk page. Please see the note at the top of my own talk page.
Xxanthippe (
talk)
21:35, 27 October 2017 (UTC).reply
How is it trivia? He wouldn't have been summoned to Parliament's assembly to define the doctrine and government of the Church if he were just an average cleric. They didn't summon mathematicians to Westminster, except for men like Wallis who also happened to mathematicians as well as divines.
208.95.51.38 (
talk)
15:42, 30 October 2017 (UTC)reply
Hi, I'm just a bystander in this debate, but let me contribute another point of view: the lead (or lede) at the top of the article is supposed to summarize the article below. (You can see more at
Wikipedia:Manual of Style/Lead section) So, if you think that he was notable as a cleric, then you should first add it to the article with appropriate references (e.g. under the "Contributions" section), and then the first sentence of the article can serve as an adequate summary of the article. Regards,
Shreevatsa (
talk)
02:41, 31 October 2017 (UTC)reply
A modern-day Newton?
"John Wallis is often known to be a modern-day Newton..."
This is a rather odd thing to say given that he was a contemporary of Isaac Newton.
Cocaineninja (
talk)
19:05, 5 December 2018 (UTC)reply
Hi @
Xxanthippe, re: adding the category "British Latinists"; he doesn't seem to be listed as an "English Latinist", although he is categorised within "English logicians". Am I missing something? On the other hand, there isn't a category for "English Latinists", it seems, which isn't good, as he's pre-British really.
Jim Killock(talk)22:32, 26 March 2023 (UTC)reply