* Marx, Karl, Theses on Feuerbach, 1845

He was the father of the philosopher Ludwig Andreas Feuerbach and the mathematician Karl Wilhelm Feuerbach ; and the grandfather of the painter Anselm Feuerbach.

* May 30 – Karl Wilhelm Feuerbach, German geometer ( d. 1827 )

Although he is credited for its discovery, Karl Wilhelm Feuerbach did not entirely discover the nine-point circle, but rather the six point circle, recognizing the significance of the midpoints of the three sides of the triangle and the feet of the altitudes of that triangle.

In 1822 Karl Feuerbach discovered that any triangle's nine-point circle is externally tangent to that triangle's three excircles and internally tangent to its incircle ; this result is known as Feuerbach's theorem.

Karl Wilhelm von Feuerbach ( 30 May 1800 – 12 March 1834 ) was a German geometer and the son of legal scholar Paul Johann Anselm Ritter von Feuerbach, and the brother of philosopher Ludwig Feuerbach.

* Karl Wilhelm Feuerbach: Geometer

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# REDIRECT Karl Wilhelm Feuerbach

# REDIRECT Karl Wilhelm Feuerbach

In Part I: “ Feuerbach — Opposition of the Materialist and Idealist Outlook ” of The German Ideology ( 1846 ), Karl Marx said: “ things have now come to such a pass that the individuals must appropriate the existing totality of productive forces, not only to achieve self-activity, but also, merely to safeguard their very existence ”.

This idealist understanding of philosophy as interpretation was famously challenged by Karl Marx's 11th thesis on Feuerbach ( 1845 ): " Philosophers have hitherto only interpreted the world in various ways ; the point, however, is to change it.

He was the fourth son of the eminent jurist Paul Johann Anselm Ritter von Feuerbach, brother of mathematician Karl Wilhelm Feuerbach and uncle of painter Anselm Feuerbach.

Only a few months later, Karl Schwarzschild found a solution to Einstein field equations, which describes the gravitational field of a point mass and a spherical mass.

His parents were both teachers and activists in a rural area of ANC strength, and Mbeki describes himself as " born into the struggle "; a portrait of Karl Marx sat on the family mantelpiece, and a portrait of Mohandas Gandhi was on the wall.

Robert G. Picard similarly describes a democratic socialist tradition of thought including Eduard Bernstein, Karl Kautsky, Evan Durbin and Michael Harrington.

Verner's law, stated by Karl Verner in 1875, describes a historical sound change in the Proto-Germanic language whereby voiceless fricatives * f, * þ, * s, * h, * hʷ, when immediately following an unstressed syllable in the same word, underwent voicing and became respectively the fricatives * b, * d, * z, * g, * gʷ.

Psychiatrist Karl Leonhard concluded: " If he had been living since childhood under the conditions he describes, he would not have developed beyond the condition of an idiot ; indeed he would not have remained alive long.

Entfremdung ( estrangement ) is Karl Marx ’ s theory of alienation, which describes the separation of things that naturally belong together ; and the placement of antagonism between things that are properly in harmony.

In 2010 Dutch investigative journalist Karl Hammer published " The secret of the sacred panel " in which he meticulously describes the involvement of various religious groups, the Vatican and British intelligence services in their attempt to recover the lost panel.

A biocoenosis ( biocoenose, biocenose, biotic community, biological community, ecological community ), coined by Karl Möbius in 1877, describes the interacting organisms living together in a habitat ( biotope ).

* The Civil War in France Karl Marx's 3rd address to the Paris Commune, describes character of Second Empire.

In Einstein's theory of general relativity, the Schwarzschild solution ( or the Schwarzschild vacuum ), named after Karl Schwarzschild, describes the gravitational field outside a spherical, uncharged, non-rotating mass such as a ( non-rotating ) star, planet, or black hole.

Socialist Appeal describes its politics as descending from Karl Marx, Friedrich Engels, Vladimir Lenin and Leon Trotsky.

* Karl Landsteiner first describes Meconium ileus.

In the late 18th century, Karl von Eckartshausen, a German Christian mystic, describes the true Adepts of the Rose Cross in the following terms: " These sages, whose number is small, are children of light, and are opposed to darkness.

The Kerr metric is a generalization of the Schwarzschild metric, which was discovered by Karl Schwarzschild in 1916 and which describes the geometry of spacetime around an uncharged, spherically-symmetric, and non-rotating body.

Michael Karl Witzel, writing in The American Drive-In Restaurant ( 2002 ) describes the archetypal soda jerk as being " consummate showman, innovator and freelance linguist ... the pop culture star of the Gilded Age ".

Dr. Karl Albrecht makes testosterone poisoning a synonym for male chauvinism in his 2002 book The Power of Minds at Work: Organizational Intelligence in Action where he describes it as one of 17 basic syndromes of dysfunction.

Aleksandr Solzhenitsyn, in his historical account of the prison camps of the Soviet Union, The Gulag Archipelago, describes Nikolai Karlovich von Meck ( son of Karl and Nadezhda von Meck, patroness of Tchaikovsky ), an engineer who advised heavier-than-average loads being placed on freight trains for the betterment of the economy.

* Karl Richard Lepsius examines, describes, and maps Meroë

* Karl Mauch explores and describes the ruins of Great Zimbabwe.

His circle included the musicians Alexander von Zemlinsky and Franz Schreker, the painter Gustav Klimt, the writer and satirist Karl Kraus, the architect Adolf Loos, and the poet Peter Altenberg.

The year 1846 found Karl Marx and his close friend and co-thinker Friedrich Engels in Brussels, establishing a small political circle of radical German émigrés called the Communist Corresponding Committee and writing for the German-language Deutsche Brüsseler Zeitung (" Brussels German Newspaper ").

Her circle of friends included Clementina Black, Dollie Radford, Eleanor Marx ( daughter of Karl Marx ), and Olive Schreiner.

However, Goodrick-Clarke's comprehensive study finds little evidence of direct influence, except in the case of the highly idiosyncratic ancient-German mythos elaborated by the ' clairvoyant ' ( but in fact schizophrenic ) SS-Brigadeführer Karl Maria Wiligut, of which the practical consequences were, first, the incorporation of Wiligut's symbolism into the ceremonies of an elite circle within the SS ; and, secondly, the official censure of those occultists and runic magicians whom Wiligut stigmatised as heretics, which may have persuaded Heinrich Himmler to order the internment of several of them.

The treasurer was Friedrich Schaefer from Mühlhausen, whose wife, Käthe, kept open house for another occult-völkisch circle ( the ' Free Sons of the North and Baltic Seas ') which gathered around Karl Maria Wiligut in the early 1930s ( ibid., 159, 183 ).

* " Iron Triangle ", a term used to refer to three core members of President George W. Bush's political inner circle: Karl Rove, Joe Allbaugh, and Karen Hughes

In this capacity Allbaugh was a key member of a tight circle of aides, together with Karl Rove and Karen Hughes, that the media dubbed the " Iron Triangle ".