Escher and the Droste effect


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Page 24 of 41 (new to old)

Gerjan Bossenbroek2003-02-04 09:53:11
Fantastisch genoten van de presentatie op de Nationale Wiskunde Dagen. Op deze manier wordt wetenschap toegankelijk gemaakt. En nu maar wachten op de mooist denkbare screensaver!!

Anna Rodenhausen2003-02-03 14:43:25
This web site is great!

giovanni curcio2003-02-03 05:53:43
this is the most amazing this i have ever seen is this for real???!!

Andrea2003-02-02 18:00:55
Leuke lezing in Maastricht, afgelopen week. Ik hoop ook dat er een screensaver komt! Succes met deze projecten. Ik vind het van groot belang dat wetenschap 'leuk' gemaakt wordt.

Erik Kauffeld2003-02-02 17:38:38
Een perfecte lezing tijdens de Nationale Wiskunde Dagen (NWD) in Noordwijkerhout. Mijn complimenten voor dit prachtig stukje techniek. Ook de site is erg goed. Ik hoop dat er nog een screensaver komt. Succes verder.

Mini2003-02-02 02:02:18
ur art work RULZ.... xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xx da 1 where he drew an eye in da middle of a hand.

Iftikhar 2003-02-01 20:04:51
Very Impressive work.

johan p snapper2003-01-31 18:29:35
Very impressive, indeed! The Dutch Studies department at the University of California (Berkeley) and the Netherlands America League of California look forward to Hendrik Lenstra's lecture on "Escher and the Droste Effect" in Berkeley on Sunday February 23.

jan maas2003-01-31 13:43:59
Ik heb veel positieve reakteis gehoord.

Reid Blackburn2003-01-31 04:55:31
great images. Thanks for your website.

Jan Maas2003-01-30 17:20:29
Prima lezing van Bart de Smit op de UT vandaag. Ik heb hem nog geattenteerd op het feit, dat Escher als kristallograaf mogelijk gebruik heeft gemaakt van delen van het "Wulff net" of een andere stereografische projectiemethode bij het tekenen van deze afbeelding. Graag hierover een reaktie. Sukses verder, Jan Maas Universiteit Twente.

Josette2003-01-28 08:57:01
Mooi gedaan!! Fraaie site.

Bill Casselman2003-01-28 07:52:22
Great stuff.

florence2003-01-27 08:10:29
just amazing !!!

olivier Pellet2003-01-25 15:40:47
Fine ! What Escher made whithout any computer, it seems you needed one, but it's fabulous! The video clip_1_1 is really interesting : a rather good animation of the perception of the drawing. A nice job concieling maths and art! Note : this special effect is known as "Flodor's Chips" effect in France (effet des Chips Flodor) or more scientifically a "mise en abime de l'image"(in french!). Good work for any new picture analysis !

Pierre Gloesener2003-01-22 22:09:25
Fantastic insight into the world of Escher, which shows at the same time the depth of his artistic thinking and the formal beauty of mathematics.Thanks and congratulations.

Steven Heylen2003-01-22 18:39:21
Ik ben gewoon op zoek naar informatie voor p.o.

Philippe HOUBART2003-01-22 12:06:58
Thanks for your marvellous job. PH from France.

Inma Blanco2003-01-21 16:51:44
I meet Escher´s work few weeks ago.I never see nothing like this. Sublime. Yo conocí el trabajo de Escher hace unas semanas y de casualidad. Nunca vi nada igual. Me parece algo Sublime.

frans klaus2003-01-21 15:42:18
As long time Escher fan (since 1960) I was delighted to see that people have taken the trouble to finish one of his great ideas with the help of the computer. The presentation of the site is also fantastic. I'm very glad that my uncle pointed me to this effort.

Aad van Ulden2003-01-21 13:54:35
Een leuke web-site. Een fascinerende blik op Escher en de Wiskunde

Wouter2003-01-21 11:59:57
Heel erg mooi om te zien dat de computer niet zomaar een stom ding hoeft te zijn.

Jeroen2003-01-20 11:03:25
Een erg mooie site die ik goed kan gebruiken. Ik ben namelijk voor CKV bezig met iets over Escher. We zijn al met een paar naar het Escher museum geweest in Den Haag. En ik kon dit er goed bij gebruiken. Kortom gewoon erg goed gedaan en goed bruikbaar voor werkstukken etcetra

cielke2003-01-17 08:44:38
Geweldige site! Samen met een jongen uit mijn klas ben ik bezig aan een profielwerkstuk over Escher. Via het krantenartikel dat over de onopgeloste tekening van Escher ging (Dagblad de Limburger) ben ik op deze site gekomen. Ik vind het zo interessant dat we nu een deelvraag van ons werkstuk aan de onopgeloste tekening (die nu opgelost is!) gaan besteden. We proberen het proces dat jullie gebruikt hebben te volgen en op onze eigen manier uit te leggen. Graag zouden we wat meer willen weten. ... read more

Jan Fryns2003-01-14 16:28:31

Samuel Verbiese2003-01-14 15:09:48
Bart de Smit kindly answered our questioning with an excellent article from SIAM (probably well-known to mathematicians...)that not only clearly explains the way the project was initiated and conducted, filling a few holes in the present site, but above all, reinstalling the flawless reputation of the team versus the memory of Escher, something the press wasn't always producing. I thus would urge all people interested to read this text asap, and would ... read more

Gemma Hall2003-01-14 14:41:27
Its a good site to visit and has helped me alot with my Art research. Its made me think about diferent tehniques that I can use.

Samuel Verbiese2003-01-14 07:29:51
Go to, Carissa. Lots of info and numerous interesting links. Also read contributions in this guestbook (site looks dormant, unfortunately: "Hellooooo, Webmaster, anybody in here ????")

Anatoly Rodionov2003-01-13 21:48:29
GREAT!!! Good job. It is good to check harmony with algebra.

Nel De Clerck2003-01-13 18:57:02
Enjoyed very much the animation. A wonderful job! How long did it take you to unravel this Escher "soft" spot?

Carissa2003-01-13 18:47:43
I would like to receive more info about Escher.

ronny walkstein2003-01-13 14:34:06
Super Sache. Danke für den Link an Samuel.

Samuel Verbiese2003-01-12 22:59:42
In this new text written to explain the very purpose of this programming project as asked by a few correspondents, I take the opportunity to add some references of people who also contributed ideas and whom I forgot to mention in previous notes. I do not repeat here those already acknowledged earlier. The point is that, among others (tilings, polyhedra, quest to infinity, etc...), Escher was working on images of impossible things and situations. Its "Print Gallery" belongs to that last ... read more

vera de kort2003-01-11 13:01:23
Samuel thanks for your thoughts.

Samuel Verbiese2003-01-11 03:01:30
Here what I try to send to all conributors with valid e-mail addresses... I hope the project team will give their comments too !. Dear Escher admirers, Recently I discovered the most inspiring site and the very interesting discussion going on in its guestbook, with more than eight hundred entries now, so I made sort of a summary with some new thoughts of mine they induced. You might be interested to have a look and further elaborate perhaps? If ... read more

Frédéric Wronecki2003-01-10 21:17:30
Connaissant Escher par deux ouvrages détaillant la construction géométrique de ses principales estampes, j'ai été plutôt frustré par vos explications sur la "Galerie d'estampes". Quelques formules mathématiques précises seraient nécessaires.

Samuel Verbiese2003-01-08 23:42:22
Coming back here after my first comments of yesterday... I took the time to dig into the guestbook, to discover it contains a few very crisp and deep thoughts that painstakingly and precisely cristallise unspoken-out impressions many readers might have experienced somehow, in the perception of both the original print and its "completion". One of the excellent features of this site really is this guestbook facility, that allows to expand and elaborate even more on the fascinating subject. ... read more

Jonny Yassanye2003-01-08 04:03:29
May I have some information on your university please?Thanks!

Sebastiaan GMC Naafs van Dijk2003-01-07 16:12:17
He is really amazing. Imagine what we let computers do today. He did it with his mind alone...!

Samuel Verbiese2003-01-07 09:57:04
Among the very best sites I've been induced to see (by Charles Fontaine) ! A meta contribution to Escher, simultaneously didactically informative and aesthetically pleasing, it virtually swallows you into infinity: a long vision of the swirling large avi's almost turns you dizzy ! Also links to a most helpfully commented on-line dictionnary on mathematical concepts.

Daniel Wathelet2003-01-06 20:43:03
Je découvre ce site grâce à Sciences & Vie, N°1023 de décembre 2002. C'est formidable, Escher nous surprend toujours mais vous l'extrapolez d'une manière tellement fantastique que cela lui aurait certainement plu.

jack2003-01-06 14:27:13
bonjoir je veux des renseinement sur ce site

Ramananarivo2003-01-05 16:43:24
On voit jusqu'à quel point l'esprit humain (même artistique) peut être tortueux. Ici, c'est pour la bonne cause alors félicitation! Monsieur Escher! Bravo!

pol2003-01-03 20:02:41
wath do you mean in mats

Corina van der Burgt2003-01-03 17:08:27
Erg leuk en knap gedaan. Hebben jullie er ooit aan gedacht om dit ook naar het Escher-museum in Den Haag te sturen? Ik ben daar pas geweest en had eigenlijk verwacht om naast het orgineel toch ook zeker iets over jullie ingevulde versie van deze tekening te zien. Groeten Corina

Satori2003-01-01 19:48:11
very psychedelic!

Zaff2002-12-29 00:09:03
And still now and then you wonder, how on earth it's possible that the Universe seem so 'infinite'..

Joël Dufresne2002-12-27 20:57:28
I found a resume about the unfinished Escher's picture on the french magazine "sciences & vie", which gave the name of your site. Whatever artists could say, you have to be congratulated for your nice job. Thank you for the pleasure that you gave me.

Maria do Carmo Miranda Guedes2002-12-26 15:09:02
I like very much Escher's work. Congratulations on your very interesting work. I have visited this site since I received SIAM NEWS (October 2002). I have shown it to several young people that seemed to have enjoyed it as much as myself.

Pau Wilfong2002-12-23 22:18:34
Thanks - very interesting. I got your web-site from a review in MAA's Mathematics Magazine.