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Willem Einthoven (21 May 1860 – 29 September 1927) was a Dutch medical doctor and physiologist. He invented the first practical electrocardiograph (ECG or EKG) in 1895 and received the Nobel Prize in Physiology or Medicine in 1924 for it ("for the discovery of the mechanism of the electrocardiogram").
Graphical representation of Einthoven's triangle. Einthoven's triangle is an imaginary formation of three limb leads in a triangle used in the electrocardiography, formed by the two shoulders and the pubis. [1] The shape forms an inverted equilateral triangle with the heart at the center. It is named after Willem Einthoven, who theorized its ...
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[1] In 1988, the method came to the attention to mathematical olympiad problems in the light of the first olympiad problem to use it in a solution that was proposed for the International Mathematics Olympiad and assumed to be the most difficult problem on the contest: [2] [3] Let a and b be positive integers such that ab + 1 divides a 2 + b 2.
The Einthoven Award (Netherlands Royal Academy of Science, InterUniversity Cardiology Institute, and Einthoven Foundation) 2000 AMS-SIAM Norbert Wiener Prize in Applied Mathematics, "in recognition of his profound impact on the field of biological rhythms , otherwise known as coupled nonlinear oscillators" [ 5 ] (shared with A. Chorin)
The Swiss pharmaceutical industry, manufacturers of machinery, appliances, precision instruments, watches and foodstuffs, for example, would suffer significantly from higher tariffs, economists at ...
From 1906, he corresponded with the Dutch physiologist Willem Einthoven concerning the latter's invention of the string galvanometer and electrocardiography, and Lewis pioneered its use in clinical settings. Accordingly, Lewis is considered the "father of clinical cardiac electrophysiology".
In mathematics, a proof by infinite descent, also known as Fermat's method of descent, is a particular kind of proof by contradiction [1] used to show that a statement cannot possibly hold for any number, by showing that if the statement were to hold for a number, then the same would be true for a smaller number, leading to an infinite descent and ultimately a contradiction. [2]