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Shone's syndrome is a rare congenital heart defect described by Shone in 1963. In the complete form, four left-sided defects are present: [1] Supravalvular mitral membrane (SVMM) Parachute mitral valve; Subaortic stenosis (membranous or muscular) Coarctation of the aorta
This article is a list of notable unsolved problems in astronomy.Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results.
The book's rationale was also praised by media outlets including Newsday and The Economist. CNN described it as an answer to the Fermi paradox. [2] Several astronomy sources also praised the book including Sky & Telescope and Astronomy magazine. Other science media also praised the book including American Scientist, Popular Mechanics, and ...
A conformal anomaly, scale anomaly, trace anomaly or Weyl anomaly is an anomaly, i.e. a quantum phenomenon that breaks the conformal symmetry of the classical theory.. In quantum field theory when we set to zero we have only Feynman tree diagrams, which is a "classical" theory (equivalent to the Fredholm formulation of a classical field theory).
The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
A special case of this problem is known as the “counting anomaly”. [ 32 ] [ 33 ] Supporters of collapse theories mostly dismiss this criticism as a misunderstanding of the theory, [ 34 ] [ 35 ] as in the context of dynamical collapse theories, the absolute square of the wave function is interpreted as an actual matter density.
Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
Schaum's Outlines (/ ʃ ɔː m /) is a series of supplementary texts for American high school, AP, and college-level courses, currently published by McGraw-Hill Education Professional, a subsidiary of McGraw-Hill Education.