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Gear of the Antikythera mechanism, a mechanical computer from the 2nd century BCE showing a previously unknown level of complexity. An out-of-place artifact (OOPArt or oopart) is an artifact of historical, archaeological, or paleontological interest to someone that is claimed to have been found in an unusual context, which someone claims to challenge conventional historical chronology by its ...
Enigma machine messages Solved (broken by Polish and Allied cryptographers between 1932 and 1945) 1939 D'Agapeyeff cipher: Unsolved 1939–1945 Purple cipher machine messages Solved (broken by Allied cryptographers in 1940) 1941 Lorenz SZ42 machine cipher messages Solved (broken by Allied cryptographers in 1942) 1944 Pigeon NURP 40 TW 194 ...
Jeffreys's perforated sheets were used by Polish cryptologists in exile in France to make the first wartime decryption of an Enigma message on 17 January 1940. [ 8 ] In early 1940, a section called " Hut 6 " — named after the building in which it was initially housed — was created to work on solving German Army and Air Force Enigma messages.
At present, there is no explanation widely accepted by economists. [ 8 ] [ 9 ] [ 10 ] The Modigliani–Miller theorem suggests that the puzzle can (only) be explained by some combination of taxes, bankruptcy costs, market inefficiency (including that due to investor psychology ), and asymmetric information .
The 10 Wildest Moments From Aaron Rodgers Enigma From The Bachelorette Diss to RFK JR 226 Four snaps into his first season with the New York Jets in 2023, Rodgers suffered a season-ending Achilles ...
The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. [1] [2] Boolos' article includes multiple ways of solving the problem.
Created Date: 8/30/2012 4:52:52 PM
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.