Calderón

Calderón, Alberto, 1920-98, Argentine mathematician, b. Mendoza, Argentina, grad. Univ. of Buenos Aires (B.S. 1947), Univ. of Chicago (Ph.D. 1950). He is known for his contributions to mathematical analysis and the development of singular integrals, which are crucial to pure mathematics and to the mathematical description of physical functions, such as heat conduction and sound transmission. With his mentor Antoni Zygmund he formulated the Calderón-Zygmund theory of singular integral operators and inspired the Calderón-Zygmund, or Chicago, school of mathematicians devoted to their study. In particular Calderón wanted to describe a calculus for elliptic differential operators; from this beginning in the 1950s, the theory of pseudodifferential operators grew in the 1960s. Calderón's influence on analysis and related areas is due in large part to the many methods that he invented and perfected. Calderón's techniques have been absorbed as standard tools not only of harmonic analysis and but also of nonlinear analysis, partial differential equations, complex analysis, and even signal processing and numerical analysis.

(born July 6, 1907, Coyoacán, Mex.—died July 13, 1954, Coyoacán) Mexican painter. The daughter of a German Jewish photographer, she had polio as a child and at 18 suffered a serious bus accident. She subsequently underwent some 35 operations; during her recovery, she taught herself to paint. She is noted for her intense self-portraits, many reflecting her physical ordeal. Like many artists working in post-revolutionary Mexico, Kahlo was influenced by Mexican folk art; this is apparent in her use of fantastical elements and bold use of colour, and in her depictions of herself wearing traditional Mexican, rather than European-style, dress. Her marriage to painter Diego Rivera (from 1929) was tumultuous but artistically rewarding. The Surrealists André Breton and Marcel Duchamp helped arrange exhibits of her work in the U.S. and Europe, and though she denied the connection, the dreamlike quality of her work has often led historians to identify her as a Surrealist. She died at 47. Her house in Coyoacán is now the Frida Kahlo Museum.

Learn more about Kahlo (y Calderón de Rivera), (Magdalena Carmen) Frida with a free trial on Britannica.com.

Calderón is a Spanish surname. It is derived from the Vulgar Latin "caldaria" ("cauldron"). Its Italian equivalent is Calderone, its French equivalent is Cauderon, its Romanian equivalent is Căldăraru. Calderón may refer to the following persons:

• Alberto Calderón, Argentine mathematician
• Felipe Calderón, President of Mexico
• Felipe G. Calderón, Filipino constitutionalist
• Francisco García Calderón Landa, President of Peru in 1881
• Francisco García Calderón Rey, Peruvian writer and diplomat, representative at the Evian Conference in 1938
• Iván Calderón (boxer), Puerto Rican boxer
• Iván Calderón (baseball), Puerto Rican baseball player
• Jorge Calderón, long-time musical collaborator with Warren Zevon
• José Calderón, Spanish basketball player, currently of the NBA Toronto Raptors
• José Luis Calderón, Argentine footballer
• Leticia Calderón, Mexican actress
• Manny Calderon, Publisher of Presa Latina, Nebraska's "Spanish/English" Newspaper. All publications are archived at the Nebraska Historical Society, University of Nebraska Lincoln.
• Nissim Calderon (נסים קלדרון) Israeli literary critic of Sephardi origin.
• Oscar Calderón, chief of Philippine National Police
• Lee Davidson Calderon, mountain biker, mountain climber, motorbike rider
• Mercedes Calderón, Cuban volleyball player
• Paco Calderón, Mexican political cartoonist
• Pedro Calderón de la Barca, Spanish dramatist
• Rafael Ángel Calderón, Father and son Costa Rican presidents
• Philip Hermogenes Calderon, British painter of Spanish origin
• Ramón Calderón, Real Madrid president
• Robert Calderon, inventor of the slap bracelet
• Ronald Calderon or Charles M. Calderon, brothers and concurrent Californian politicians
• Sila María Calderón, former Governor of the Commonwealth of Puerto Rico
• Tego Calderón, Puerto Rican rapper

External links

• Calderón Ancestry webpage