Otto Weininger (] ; 3 April 1880 – 4 October 1903) was an Austrian philosopher.
 In 1903, he published the book "Geschlecht und Charakter" ("Sex and Character"), which gained popularity after his suicide at the age of 23.
 Some people find Weininger's ideas to be misogynistic and antisemitic, while others find them to be extremely perceptive and realistic.
 Parts of his rhetoric were used by the Nazi regime (while at the same time denouncing him) - though this arguably cannot be held against him.
 Despite all criticisms Weininger was held to be a great genius by the philosopher Ludwig Wittgenstein and the writer August Strindberg (see discussion below).
The New Wittgenstein (2000) is a book containing a family of interpretations of the work of philosopher Ludwig Wittgenstein.
 In particular, those associated with this interpretation, such as Cora Diamond, Alice Crary, and James F. Conant, understand Wittgenstein to have avoided putting forth a "positive" metaphysical program, and understand him to be advocating philosophy as a form of "therapy."
 Under this interpretation, Wittgenstein's program is dominated by the idea that philosophical problems are symptoms of illusions or "bewitchments by language," and that attempts at a "narrow" solution to philosophical problems, that do not take into account larger questions of how the questioner conducts his life, interacts with other people, and uses language generally, are doomed to failure.
Ludwig Josef Johann Wittgenstein ( ; ] ; 26 April 1889 – 29 April 1951) was an Austrian-British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language.
 From 1929 to 1947, Wittgenstein taught at the University of Cambridge.
 During his lifetime he published just one slim book, the 75-page "Tractatus Logico-Philosophicus" (1921), one article, one book review and a children's dictionary.
 His voluminous manuscripts were edited and published posthumously. "
Philosophical Investigations" appeared as a book in 1953, and has since come to be recognised as one of the most important works of philosophy in the twentieth century.
 His teacher Bertrand Russell described Wittgenstein as "the most perfect example I have ever known of genius as traditionally conceived; passionate, profound, intense, and dominating".
Margaret "Gretl" Stonborough-Wittgenstein (September 19, 1882 – September 27, 1958), of the prominent and wealthy Viennese Wittgenstein family, was a sister of the philosopher Ludwig Wittgenstein and the pianist Paul Wittgenstein.
 She was the subject of a famous 1905 portrait painted for her wedding by the artist Gustav Klimt (Stonborough-Wittgenstein and other members of the Wittgenstein family were among Klimt's most important patrons), which was sold in 1960 by her son Thomas and may now be seen in the Neue Pinakothek gallery in Munich.
Frank Plumpton Ramsey ( ; 22 February 1903 – 19 January 1930) was a British philosopher, mathematician and economist who died at the age of 26.
 He was a close friend of Ludwig Wittgenstein and was instrumental in translating Wittgenstein's "Tractatus Logico-Philosophicus" into English, as well as persuading Wittgenstein to return to philosophy and Cambridge.
 Like Wittgenstein, he was a member of the Cambridge Apostles, the intellectual secret society, from 1921.
The Austrian Ludwig Wittgenstein Society was first established in 1974 to promote philosophical conferences, workshops, summer schools, and research that are inspired by the work of Ludwig Wittgenstein and the Vienna Circle.
 It is an international society, which also has a publication series.
The International Wittgenstein Symposium is an international conference dedicated to the work of Ludwig Wittgenstein and its relationship to philosophy and science.
 It is sponsored by the Austrian Ludwig Wittgenstein Society.
Ludwig Wittgenstein considered his chief contribution to philosophy to be in the philosophy of mathematics, a topic to which he devoted much of his work between 1929 and 1944.
 As with his philosophy of language, Wittgenstein's views on mathematics evolved from the period of the Tractatus Logico-Philosophicus, changing from logicism which was endorsed by his mentor Bertrand Russell, to a general anti-foundationalism and constructivism that was not readily accepted by the mathematical community.
 The main source in Wittgenstein's thinking on mathematics is the text compiled as "Remarks on the Foundations of Mathematics", which contains the late Wittgenstein's views, notably a controversial repudiation of Gödel's incompleteness theorems.
 The success of Wittgenstein's general philosophy has tended to displace the real debates on more technical issues.
Some Remarks on Logical Form (German: "Bemerkungen über logische Form" ) was the only academic paper ever published by Ludwig Wittgenstein, and contained Wittgenstein's thinking on logic and the philosophy of mathematics immediately before the rupture that divided the early Wittgenstein of the Tractatus Logico-Philosophicus from the later Wittgenstein.
 The approach to logical form in the paper reflected Frank P. Ramsey's critique of Wittgenstein's account in the Tractatus, and has been analyzed by G.E.M. Anscombe and Jaakko Hintikka, among others.
Wittgenstein’s Nephew is an autobiographical work by Thomas Bernhard, originally published in 1982.
 It is a recollection of the author's friendship with Paul Wittgenstein, the nephew of Ludwig Wittgenstein and a member of the wealthy Viennese Wittgenstein family.
 Paul suffers from an unnamed mental illness for which he is repeatedly hospitalized, paralleling Bernhard's own struggle with a chronic lung disease.

Question: Ludwig Wittgenstein and Otto Weininger both studied in what field?
Answer: philosophy