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Pierre DuhemFrench physicist, mathematician, philosopher and historian of science
Date of Birth: 10.06.1861
Country:  France |
Content:
Biography of Pierre Duhem
Pierre Duhem was a French physicist, mathematician, philosopher, and historian of science. He is known for his major contributions to hydrodynamics, electrodynamics, magnetism, elasticity theory, and classical thermodynamics. Duhem was a proponent of conventionalism and the concept of uncertainty in experimental criteria, which are among the fundamental principles of positivist philosophy of science. In the humanities, he reevaluated the role of the Middle Ages in the development of natural sciences and was one of the first to understand the significance of the history of science in its methodology and theory of knowledge. He was a member of the Paris Academy of Sciences (1913).
Early Life and Education
Pierre, the eldest of four children, was born on Rue des Jeûneurs in Paris to Pierre-Joseph Duhem, a traveling salesman, and his wife Alexandrine Fabre. At the age of eleven, Pierre Duhem entered the Collège Stanislas, where he displayed exceptional abilities in all subjects, excelling in history, Latin, Greek, mathematics, and natural sciences. His versatile talents presented him with a choice between pursuing further education at the more academic École Normale Supérieure or the Polytechnic School, which promised a more practical career as an engineer, as his father had envisioned. However, his mother wanted him to develop his abilities in the humanities by studying Latin and Greek at the École Normale, fearing that delving into rational knowledge would distance him from the faith she instilled in her children. Initially, Pierre Duhem passed entrance exams for both institutions but decided to dedicate himself to the study of exact sciences at the École Normale, where he began his studies on August 2, 1882. It was within the walls of the École Normale that Duhem published his first article on electrochemical cells. In the same year, before receiving his degree in mathematics, Duhem presented a dissertation abstract on the thermodynamic potential in physics and chemistry, which examined criteria for chemical reactions in terms of free energy. During his work on the paper, Duhem discovered an erroneous criterion put forth by Marcellin Berthelot twenty years earlier. Duhem's critique of Berthelot's theory provided a correct alternative. Unfortunately, due to his scientific authority being questioned, Berthelot was unable to objectively evaluate this criticism, and Duhem's thesis was rejected. Firm in his conviction, Pierre Duhem boldly published the rejected thesis in 1886, which, of course, did not improve his relationship with Berthelot, who became the Minister of Education of France shortly after (1886). Meanwhile, Pierre Duhem worked on his second thesis, this time wisely choosing a mathematical topic related to magnetism, which was accepted in 1888. However, the conflict with Berthelot had a lasting impact on the scientist's life.
Career and Contributions
From 1887 to 1893, Duhem worked in Lille. In 1894, he became a professor of theoretical physics at the University of Bordeaux. In 1886, Duhem introduced the concept of thermodynamic potentials. His philosophical analysis focused on the physical theory presented by two historically established directions: the tradition of Descartes-Laplace (the "explanatory" theory) and the tradition of Pascal-Ampère (the "descriptive" theory). In Duhem's constructed logical system, physical theory does not explain experimental regularities through hypotheses based on inaccessible facts. Such interpretations belong to the realm of metaphysics, and as science develops, it distances itself from this method, accumulating theoretical experience. The application of the latter should serve as a consistent systematization and classification of experimental results. Duhem's methodological views on the philosophy of natural science are presented in his work "La théorie physique: son objet et sa structure" (The Aim and Structure of Physical Theory). In this work, he offers an historiographical critique of the "inductive method" in Newton's fundamental principles concerning the universal law of gravitation, derived from the "phenomena" including Kepler's second and third laws. Prior to Duhem, Newton's theory had already faced valid and well-argued criticisms from G.W. Leibniz and, later, most convincingly from Immanuel Kant during his logical and critical analysis of David Hume's induction. Duhem's critique of induction in his work is recognized as one of his undeniable and most productive achievements in the methodology of comparative history of science. Through a series of logical comparisons, the scientist demonstrates convincingly that Newton's law of universal gravitation (the traditional foundation of the inductivists) is not a consistent inductive generalization of the laws empirically derived by Kepler; on the contrary, it contradicts them. Duhem applies a similar critical analysis to the conclusions of A.M. Ampère, a follower of Newtonian ideology in the development of electrodynamics, demonstrating that "the mathematical theory of electromagnetic phenomena is not at all based on the method prescribed by Ampère, nor is it exclusively derived from experimental data."
Unlike many historians who considered the Middle Ages as an era of "obscurantism," spiritual degradation, stagnation, or a "wrong path" of natural science, Duhem independently and quite successfully developed the ideas prevalent at the time that acknowledged a spiritual rise in the European culture preceding the Renaissance. His interest in research in this area arose from studying the morphology of statics when he encountered the works of medieval mathematicians and philosophers such as Jean Buridan, Nicole Oresme, and Roger Bacon, whose intricate worldview fascinated him. Duhem came to conclusions that allowed him to eventually see, behind their work and sources upon which they relied in their reasoning, the prerequisites for the formation of what contemporary science understands as the substrate and precursor to many discoveries made by Galileo Galilei and subsequent thinkers. Duhem concluded that mechanics and physics, which contemporary science takes pride in, in a series of continuous and barely noticeable improvements, can be traced back to the doctrines found in the heart of medieval schools.
In summary, Pierre Duhem had a multifaceted career as a physicist, mathematician, philosopher, and historian of science. His contributions to various fields, such as hydrodynamics, electrodynamics, magnetism, elasticity theory, and classical thermodynamics, left a lasting impact. Additionally, his philosophical analysis challenged the traditional explanations in the physical theory, critiquing both the inductive method and the Newtonian ideology. Duhem's exploration of the Middle Ages led him to recognize the intellectual advancements of that period, providing a foundation for the subsequent development of science.
