Art & History


To be simple

Photo of Yvo Jacquier, by Guillaume Murray-Bechaux.

Yvo Jacquier by Guillaume Murray-Béchaux
(San Fancisco, California - 2008)

Yvo Jacquier is a painter and a researcher in history of art. To him, both activities are inseparable: the painter needed the skills of Renaissance masters to continue his quest. The forgotten culture of Rublev, Botticelli and Dürer was necessary in accessing the harmony of composition.
People are often surprised about the reality of a mathematic presence in art. They usually anticipate literary elements in order to feed their inspiration. But we don't speak about contemporary mathematics. This practice is called « geometry with the eyes ». And this very visual discipline avoids calculation, even in its demonstrations ! It is a sort of intelligence in painting, similar to what harmony is in music - which doesn't surprise anyone.


These documents focus on the artist.

The short biography of Yvo Jacquier.
The short version
Presentation in one page.

The visual biography of Yvo Jacquier.
The visual version
Document entitled « Line is my job ».

The complete biography of Yvo Jacquier.
The full version
Complete biography.


Before research on composition (French)
Monograph about the french painter Yvo Jacquier.

Research - Art History

Capital letter T, of the word The. he artist wanted to surpass his classical way to build his paintings. He needed special skills in composition. The Moderns have been on this path, but they failed totally (eg Picasso, Dali). Yvo Jacquier remembered his academic background in mathematics; a long study began in 2002.
A new field of research, as well as a new methodology, requires a long time to reach accomplishment. That's why Yvo Jacquier consecrated 10 years to the process before exposing the first results to the public.

The first partners are mathematicians [IREM = Institute of Research in Mathematics Education]. It was necessary to rebuild the geometric vocabulary involved in the ancient works. Then, application is what follows with composition, which is the act of inserting the figures into the works. This step can be of a great interest for the schools of art and architecture, practices and contemporary artists. 

First finding : the main properties of the figures are totally unedited. This proves that sacred geometry is mostly unknown. Second finding : this Egyptian Geometry is entirely coherent (and even more : without calculation). In fact, the Greeks didn't invent mathematics, they found them it Egypt.

Comparative Geometry. Article wiith IREM about root of three in the tympanum of Conques. 2015 - The tympanum of Conques
(pdf - collaboration with IREM Poitiers). Several mathematicians compare their solutions about a mysterious figure. The « G of Conques», dating from 11°-12°C, is at the moment the only one explicit lesson of sacred geometry by the Ancients.

Egyptian Geometry. Full article about the corpus of pre-euclidean geometry. 2014 - The Egyptian Geometry
(pdf - reviewed by Jean-Paul Guichard, IREM). The total restitution of the « corpus » : the academic lesson of Egyptian Geometry.

Publication of the ebook : « Dürer et ses tarots ». 2014 - « Dürer et ses Tarots »
(ebook by Yvo Jacquier, in french at the moment). This long study gathers the essential proofs of research. Albrecht Dürer has been the last great master in Sacred Geometry. The italian painters of Renaissance proposed a particular mission to the best engraver of their times. He finished the job of a Byzantine project : a series of cards that will become famous as « Tarots de Marseille ».

Charles University. Article on the conference about art and geometry. 2013 - Conference at University
(pdf - Summation of the lecture). A mathematician of Charles University, Zdenek Halas, has invited Yvo Jacquier to give a conference to the students. The theme was « Mathematics and Art ».

Repères-IREM. Publication of an article by Yvo Jacquier. 2012 - Scientific Publication
Publication of an article by Yvo Jacquier, in the french national magazine « Repère-IREM ». The main points are the discovery of the Egyptian definition about the Golden Ratio, and second : its unexpected presence into the triangle 3-4-5.