Eigenvalues and eigenvectorsIn linear algebra, an eigenvector (ˈaɪgənˌvɛktər) or characteristic vector of a linear transformation is a nonzero vector that changes at most by a constant factor when that linear transformation is applied to it. The corresponding eigenvalue, often represented by , is the multiplying factor. Geometrically, a transformation matrix rotates, stretches, or shears the vectors it acts upon. The eigenvectors for a linear transformation matrix are the set of vectors that are only stretched, with no rotation or shear.
Algerian WarThe Algerian War (also known as the Algerian Revolution or the Algerian War of Independence) was a major armed conflict between France and the Algerian National Liberation Front (Front de Libération Nationale – FLN) from 1954 to 1962, which led to Algeria winning its independence from France. An important decolonization war, it was a complex conflict characterized by guerrilla warfare and war crimes. The conflict also became a civil war between the different communities and within the communities.
GnomonicsGnomonics (from the ancient Greek word γνώμων, /ɡnɔ̌ː.mɔːn/, meaning 'interpreter, discerner') is the study of the design, construction and use of sundials. The foundations of gnomonics were known to the ancient Greek Anaximander (ca. 550 BCE), which augmented the science of shadows brought back from Egypt by Thales of Miletus. Gnomonics was used by Greek and Roman architects from 25 BCE for the design of buildings. Modern gnomonics has its root in the nascent European astronomy of the 16th Century.
French peopleThe French people (Français) are a nation primarily located in Western Europe that share a common French culture, history, and language, identified with the country of France. The French people, especially the native speakers of langues d'oïl from northern and central France, are primarily descended from Gauls (including the Belgae), Romans (or Gallo-Romans, western European Celtic and Italic peoples), as well as Germanic peoples such as the Franks, the Visigoths, the Suebi and the Burgundians who settled in Gaul from east of the Rhine after the fall of the Roman Empire, as well as various later waves of lower-level irregular migration that have continued to the present day.
