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Bony's research deals with microlocal analysis, partial differential equations and potential theory.In 1981 he published important results on paradifferential operators, extending the theory of pseudifferential operators published by Ronald Coifman and Yves Meyer in 1979.
Annales de la Société Polonaise de Mathématique. 5. 1926. "Les systèmes d'équations aux dérivées partielles" (PDF). Mémorial des Sciences Mathématiques. 21: 1–55. 1927. Janet, Maurice (1929). "Les systèmes comprenant autant d'équations aux dérivées partielles que de fonctions inconnues. Caractéristiques singulières des ...
De Bruijn–Erdős theorem: Mathematics: Nicolaas Govert de Bruijn and Paul Erdős: De Morgan's law: Logic: Augustus De Morgan: Dermott's law: Celestial mechanics: Stanley Dermott: Descartes's theorem: Geometry: René Descartes: Dirac equation Dirac delta function Dirac comb Dirac spinor Dirac operator See also: List of things named after Paul ...
Xcas can solve differential equations. Xcas is a user interface to Giac , which is an open source [ 2 ] computer algebra system (CAS) for Windows , macOS and Linux among many other platforms. Xcas is written in C++ . [ 3 ]
The 42S, however, has a much smaller form factor than the 41, and features many more built-in functions, such as a matrix editor, complex number support, an equation solver, user-defined menus, and basic graphing capabilities (the 42S can draw graphs only by programs). Additionally, it features a two-line dot matrix display, which made stack ...
Baron Siméon Denis Poisson FRS FRSE (French: [si.me.ɔ̃ də.ni pwa.sɔ̃]; 21 June 1781 – 25 April 1840) was a French mathematician and physicist who worked on statistics, complex analysis, partial differential equations, the calculus of variations, analytical mechanics, electricity and magnetism, thermodynamics, elasticity, and fluid mechanics.
Faà di Bruno's formula is an identity in mathematics generalizing the chain rule to higher derivatives. It is named after Francesco Faà di Bruno (1855, 1857), although he was not the first to state or prove the formula.
The Wheeler–DeWitt equation [1] for theoretical physics and applied mathematics, is a field equation attributed to John Archibald Wheeler and Bryce DeWitt. The equation attempts to mathematically combine the ideas of quantum mechanics and general relativity , a step towards a theory of quantum gravity .