The topology of SO (4) is the same as that of the Lie group SO (3) × Spin (3) = SO (3) × SU (2), namely the space where is the real projective space of dimension 3 and is the 3-sphere.

Length of 70 feet (21 m), when standard loading gauge carriages that were able to traverse the entire railway in Great Britain were a maximum of 57 feet (17 m) Width of 9 feet 6 inches (2.90 …

The triangular yield sign was used as early as 1937, when it was introduced in Denmark in red and white (matching the Danish flag), [1] in 1938 when it was codified in Czechoslovakia in a …

Counterurbanization, ruralization, or deurbanization is a demographic and social process in which people move from urban areas to rural areas. It, as suburbanization, is inversely related to …

Over the years, La Linea gained a widespread popularity worldwide, [1][2][3] and it is considered to be a cult classic. [4] It also spawned a comic strip, books, additional short movies, …

Centrifugal Railway was the name of a number of early looping roller coasters that were built in Western Europe in the middle of the 19th century. These rides were very similar in their basic …

Alèxia Putellas i Segura[note 1] (Catalan pronunciation: [əˈlɛksiə puˈteʎə səˈɣuɾə] (listen ⓘ); [note 2] Spanish: Alexia Putellas Segura; [note 3] born 4 February 1994), often known …

The PPSZ algorithm has a runtime [clarify] of for 3-SAT. This was the best-known runtime for this problem until 2019, when Hansen, Kaplan, Zamir and Zwick published a modification of that …