From 1927 to 1933, he followed his scholarship in various schools of Boulogne-sur-Mer and later in Lycée Hoche in Versailles. Thereafter, he studied English and Law at the University of Lille.
Mathieu obtained a position as an English teacher in 1942 at the lycée of Douai in the north of France. During the following years, he held several jobs serving as an interpreter for the American Army in Cambrai in 1944, teaching in the American University of Biarritz and in Istres during years 1945-46.
Mathieu then worked for the United States Lines in charge of public relations on the line between New York City and Le Havre: his function was to welcome and accompany the travelers during their move between Le Havre and Paris. This position was an opportunity for Mathieu to reach a prestigious clientele, and form his first network of potential customers. He meets Salvador Dalí for the first time on his occasion.
The group is later expanded, with Michel Tapié, Picabia and François Stahly to form H.W.P.S.M.T.B., exposing at the Galerie Allendy. He promoted an art free from the constraints of figurative paintings and defining the concept of Lyrical Abstraction.
In 1948, he put in place the first confrontation between American and French avant-garde painters : on this occasion he revealed the importance of the American abstraction of Jackson Pollock and Alton Tobey to the French audience.
He painted his first large canvases as soon as 1952.
Mathieu and Simon Hantaï held a series of conferences called the Cérémonies commémoratives de la seconde condamnation de Siger de Brabant in 1957. During three weeks, various debates questioned the foundations of western civilisations, the role of the great men and revolutions that shaped the western culture from the Edict of Milan in 313 up to the contemporary breakthroughs in physics and philosophy. Many scholars like essayist T.S. Eliot, philosopher Stéphane Lupasco and scientists took a stand at these conferences. The event was named after the philosopher Siger de Brabant, who played a key role in the 13th-century.
In 1965, Mathieu exposed a hundred paintings at the Galerie Charpentier. He executed for this event Paris, Capitale des Arts, a giant canvas featuring primary colors on a blue background. Today, Galerie Charpentier's walls house the headquarters of Sotheby's France, rue Faubourg Saint-Honoré in Paris.
A great retrospective at the Grand Palais opened in 1978 and covered the fifteen last years of his production. Seven six meters wide paintings, executed from January to March 1978, were made especially for the occasion.
He received the Legion of Honour and is Commander of Arts and Letters. Mathieu’s works now appears worldwide in more than 90 museums.Wikipedia