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In number theory, a Descartes number is an odd number which would have been an odd perfect number if one of its composite factors were prime.They are named after René Descartes who observed that the number D = 3 2 ⋅7 2 ⋅11 2 ⋅13 2 ⋅22021 = (3⋅1001) 2 ⋅ (22⋅1001 − 1) = 198585576189 would be an odd perfect number if only 22021 were a prime number, since the sum-of-divisors ...
NATO has 12 original founding member states. Three more members joined between 1952 and 1955, and a fourth joined in 1982. Since the end of the Cold War, NATO has added 16 more members from 1999 to 2024. [2] NATO currently recognizes Bosnia and Herzegovina, Georgia, and Ukraine as aspiring members as part of their Open Doors enlargement policy. [3]
This is a list of individuals serving in the United States House of Representatives (as of September 23, 2024, the 118th Congress). [1] The membership of the House comprises 435 seats for representatives from the 50 states, apportioned by population, as well as six seats for non-voting delegates from U.S. territories and the District of Columbia.
The members of the European Parliament have been elected by universal suffrage since 1979 (before that, they were seconded from national parliaments). [32] [33] The national governments appoint one member each to the European Commission, the European Court of Justice and the European Court of Auditors. Prospective Commissioners must be ...
Irene Blecker Rosenfeld (born May 3, 1953) [2] is an American businesswoman who was the chairman and chief executive officer (CEO) of Mondelēz International. [3] Rosenfeld's career began at Dancer Fitzgerald Sample, a New York City advertising agency.
Blanche Descartes was a collaborative pseudonym used by the English mathematicians R. Leonard Brooks, Arthur Harold Stone, Cedric Smith, and W. T. Tutte.The four mathematicians met in 1935 as undergraduate students at Trinity College, Cambridge, where they joined the Trinity Mathematical Society and began meeting together to work on mathematical problems.
In mathematics, Descartes' rule of signs, described by René Descartes in his La Géométrie, counts the roots of a polynomial by examining sign changes in its coefficients. The number of positive real roots is at most the number of sign changes in the sequence of polynomial's coefficients (omitting zero coefficients), and the difference ...
Saudi Arabia was invited to join at the 15th BRICS summit, but has not yet formalised its approval to become a BRICS member. [9]While Egypt, Ethiopia, Iran, and the United Arab Emirates were not admitted as members during the 15th BRICS summit, they were among 22 countries applying for membership.