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Theorem of the Day is maintained by Robin Whitty. Comments or suggestions are welcomed by me.

All text and images and associated .pdf files © Robin Whitty, 2005–2009, except where otherwise acknowledged. See FAQ for more.


Posted by Bob14:57, 30 06 2009Italy
Maths is my passion also!


Posted by John12:53, 30 06 2009UK
This has also resparked my interest in Maths. I love it - many thanks!


Posted by Ronstewart06:45, 23 06 2009Australia
There is no simple algebraic formula for the catenary_


Posted by Josh22:57, 17 06 2009jason@tintophat.com
This has resparked my interest in Maths. Love it - many thanks!


Posted by Rupinder Dulay09:48, 12 05 2009CDHS Castle Douglas
A great site even though I find the mathematics very difficult but the real mathematician I work with are using the calendar with their A level students.


Posted by Imelda Almqvist19:42, 15 04 2009www.imelda-almqvist-art.com
Dear Robin, your website is such a treasure trove of mathematical ideas - I will keep on coming back for more!!

Had some fun today with the Borsuk-Ulam Theorem. The ingredients were a tailor's tape measure, a ruler and a 'mathematical balloon' (on which I had scribbled numbers). And you know, I did find number correspondences!

The real challenge will of course be to express some of my findings in a painting...

With many thanks for feeding me a diet of mathematical concepts! :-)

Imelda Almqvist


Posted by Candida17:08, 12 04 2009Circle appreciation
Oooh I just love todays theorem! Very harmonious! Keep up the excellent imagery for a simples way to success Mr.Whitty!


Posted by Candida16:54, 27 02 2009cloud 5
Absolutely love todays theorem!! Pretty, colourful, intriguing and full of suprises! Happy Birthday to Ms. Sidhu today too! Keep up the good work! x


Posted by Hyeong-Kwan Ju06:22, 23 02 2009Chonnam National University, S. Korea
Very glad to meet Website like this.
Hope this is one giant step to let people outside of mathematical world
know what we are doing and concerning
...
It is very useful for the mathematician
to know the other side of mathematical world.


Posted by Des Wann22:31, 05 01 2009Australia
What a wonderful site for a retired Head of Mathematics Department! Keeps up my interest in both the history and content of mathematics. It also brings back many memories (both good and bad) dealing with the subtle nuances of the subject.
Well done, Robin.


Posted by Willy Hereman23:06, 15 12 2008http://inside.mines.edu/~whereman
Thank you very much for offering this site and also for the free calendar. Beautiful!


Posted by Gérard P. Michon, Ph.D.02:50, 11 12 2008www.numericana.com
Your 2009 calendar is beautiful. Thank you so much for producing it.


Posted by mike newman01:27, 26 11 2008ottawa
Hey you are number one on google!


Posted by terence tao20:36, 10 11 2008ucla
I want to congratulate you on your beautiful site. may you reach 1000 theorems one day.


Posted by emri19:41, 04 11 2008vendi
keep up the good work!


Posted by carrie13:29, 02 11 2008hackney
CRB's 25th?


Posted by John Kemeny21:08, 21 10 2008johnkemeny.com/blog
Very nice!


Posted by Harriet Pollatsek22:35, 18 10 2008Mount Holyoke College, South Hadley, MA, USA
Greetings from New England to Old England.


Posted by Kalun13:27, 17 10 2008CEIBS, Shanghai, China
My students never had so much fun with maths before. Well done, keep up the good work.


Posted by Harvey16:42, 03 10 2008Canada
A very nice site, Robin. It is attractive and informative. A great contribution to the popularization of mathematics.


Posted by jaejun17:36, 04 09 2008london
hi do you remember me??
I'm korean we met near the new cross gate before 10 days.
your homepage is really intereting..
I'm not sure whether you see or not but, I'll just try
have a good day


Posted by Sam tetruashvili16:57, 24 05 2008Carnegie Mellon University, School of Computer Science
Great site.


Posted by Andy Drucker17:50, 23 05 2008MIT, Massachusetts (grad student, EECS dept)
Beautiful site! I'll tell my friends.


Posted by Eileen08:05, 23 05 2008ruby.optionextreme.net
Congratulation,
an excellent site, keep up the good work!


Posted by Kungwa14:58, 01 05 2008King's College London
I would like to reiterate the semi-recluse, Charles Wallingford's posting. Keep up the good work


Posted by Norman12:48, 01 05 2008Queen Mary Univ London
Great site - keep up the good work


Posted by ahmad15:18, 18 04 2008www.mathramz.com
Hi
your site is nice
may be i will list it in the mathsite glossary
in our site
www.mathramz.com
regards


Posted by Candida Bradley08:57, 07 04 2008Salford University
What a delight the cows are today!! ooooh so pretty :)

Keep up the good visuals as well as the intriguing maths!


Posted by Carrie Rutherford15:39, 12 03 2008LSBU
Well, here I am. As you know, I think theorem of the day is GREAT, and I have spread the calendars far and wide.


Posted by Gagan12:52, 06 03 2008London
Congratulations on the calendar and spreading the word on theorems. Look forward to you next batch of theorem calendars


Posted by Candida11:28, 27 02 2008Salford University
Thank you for brigthening up my days with your beautifully-drawn and colourful theorems! They make maths seem approachable, even to those who scraped through their maths GCSE. Continue to delight!


Posted by Fatima Affif Chaouche09:30, 26 02 2008University of Sciences and Technology Houari Boumediene. Algiers. Algeria.
Certainly I am happy to have the opportunity to transmit you my congratulation! Also to thanks you for giving me the possibility to discover this web site, which is really a very important site. Happy that I am in your mailing list.
Hope to receive more and more news.
Fatima


Posted by mike newman00:15, 25 02 2008Victoria University Wellington, New Zealand
Congratulations! Happy century, TotD.


Posted by Taoyang20:58, 24 02 2008London
Congratulations Robin in building the century and Tony in creating the century:-)


Posted by Dave07:35, 22 02 2008Durham
Keep up the good work!


Posted by Stuart J Hutcheon18:45, 21 02 2008London South Bank University
Congratulations Robin in reaching your century. Well done.


Posted by sara munday15:42, 21 02 2008www-maths.mcs.st-andrews.ac.uk/homepages/sam20.html
Congratulations on your 100 theorems! Slightly belatedly, many thanks for the calendar of theorems by women mathematicians. It is an inspiration every day.


Posted by Cahit15:28, 21 02 2008www.emu.edu.tr/~cahit/
Remarkable achievement. Hope to see other 100 theorems soon.


Posted by Jean Drabbe07:53, 20 02 2008University of Brussels
I was told about Theorem of the Day be
a colleague. I am delighted he did.
Congratulations !!!
Jean Drabbe
University of Brussels
(Belgium)


Posted by Tony Forbes20:38, 19 02 2008anthony.d.forbes.googlepages.com/adf.htm
Hi Robin,

Congratulations on reaching that magic number! And how appropriate to celebrate the historic occasion of Theorem 100 with a mathematical object containing word 'century' in its description.

Keep up the good work!

Best wishes,

Tony.


Posted by John16:37, 19 02 2008London
The calendar looks cool!


Posted by Pinky15:14, 19 02 2008London
As a non-mathematician, I can only appreciate the theorems from an aesthetic point of view - but love the links to artwork too!


Posted by Charles Wallingford15:03, 19 02 2008Donostia
Keep up the good work!