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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.
This is a list of the most intense tropical cyclones as measured by minimum atmospheric pressure at sea level. Although maximum sustained winds are often used to measure intensity as they commonly cause notable impacts over large areas, and most popular tropical cyclone scales are organized around sustained wind speeds, variations in the ...
The question is whether or not, for all problems for which an algorithm can verify a given solution quickly (that is, in polynomial time), an algorithm can also find that solution quickly. Since the former describes the class of problems termed NP, while the latter describes P, the question is equivalent to asking whether all problems in NP are ...
Goldbach’s Conjecture. One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes ...
List of countries by natural disaster risk; List of all known deadly earthquakes since 1900; List of disasters in Canada; List of disasters in Indonesia; List of disasters in the Philippines; List of disasters in Thailand; List of natural disasters in the British Isles; List of natural disasters in Haiti; List of natural disasters in New Zealand
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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.
It has also been called the worst song of all time by GQ [96] and The A.V. Club, and named one of the worst songs of all time in a readers' poll in the New York Post. The group's co-lead singer Grace Slick has called it "the worst song ever" and "awful". [94] [96] "Don't Worry, Be Happy", Bobby McFerrin (1988)