IN: Ted Arnbjorn Gardestad (Swedish pronunciation: [ted 2jae:de,sta:d]) (18 February 1956 - 22 June 1997) was a Swedish singer, songwriter, musician and actor known internationally as Ted. Gardestad began his acting career in 1966 and began playing music in 1971, signing with Polar Music. Assigned with in-house producers Benny Andersson and Bjorn Ulvaeus, Gardestad released his first single, "Hela varlden runt," in late 1971 and worked closely with the four members of ABBA to create his debut album Undringar (1972). As Polar Music's best-selling solo artist (aside from ABBA), he continued to work with the group members throughout the 1970s, releasing three more albums Ted (1973), Upptag (1974) and Franska Kort (1976), which were moderately successful.

Shortly after Gardestad's return to Sweden in 1986, the Prime Minister of Sweden, Olof Palme, was murdered. Gardestad was wrongly mentioned in the Swedish media as "the 33-year-old", a suspect in the investigation of the assassination, which severely affected him although Gardestad was on vacation in Greece at the time of the murder, and although he was never questioned by the Swedish police nor was under suspicion by the authorities, the speculations and rumours followed him and his family for the rest of the 1980s. A few years later, he was again the subject of rumours accusing him of being Lasermannen, a bank robber and serial killer. The rumours affected the sensitive and already unstable former star, and Gardestad withdrew and fell into a deep depression. In the early 1990s, Gardestad was briefly coaxed out of retirement by his friend and fellow Swedish pop singer Harpo. He joined Harpo on a concert tour and made guest appearances. In 1992, they released the duet "Lycka" ("Happiness") as a single; it garnered little attention but marked Gardestad's return to music. Early that year he embarked on his first tour since 1978 and played a series of dates with Plura Jonsson, Tove Naess, Totta Naslund and Dan Hylander, and received overall positive reviews from the press. In 1993, a compilation album titled Kalendarium 1972-93 was promoted by a tour in the Swedish folkparks; the album and tour were successful, as was his first composition in twelve years, "For karlekens skull" ("For Love's Sake"), which topped the Svensktoppen chart. The Kalendarium collection included a Swedish-language re-recording of the title track from Blue Virgin Isles, "Himlen ar oskyldigt bla" ("The Sky is Innocently Blue"), which fifteen years after its original release became another Svensktoppen hit, and became one of his best-known songs. In early 1994, Kalendarium 1972-93 was awarded a platinum disc. All of Gardestad's albums from the 1970s and early 1980s, with the exception of Blue Virgin Isles, were re-released on CD by Polar, and a generation of Swedes who grew up listening to his music now re-discovered and re-evaluated his back catalogue as adults. His body of work has since come to be regarded as a national treasure as important as those of Evert Taube, Carl Michael Bellman and Cornelis Vreeswijk both by fans and Swedish music critics.
QUESTION: How was the duet received?
IN: Friedrich Ludwig Gottlob Frege (; German: ['gotlo:p 'fre:g@]; 8 November 1848 - 26 July 1925) was a German philosopher, logician, and mathematician. He is understood by many to be the father of analytic philosophy, concentrating on the philosophy of language and mathematics. Though largely ignored during his lifetime, Giuseppe Peano (1858-1932) and Bertrand Russell (1872-1970) introduced his work to later generations of logicians and philosophers.

Frege matriculated at the University of Jena in the spring of 1869 as a citizen of the North German Confederation. In the four semesters of his studies he attended approximately twenty courses of lectures, most of them on mathematics and physics. His most important teacher was Ernst Karl Abbe (1840-1905; physicist, mathematician, and inventor). Abbe gave lectures on theory of gravity, galvanism and electrodynamics, complex analysis theory of functions of a complex variable, applications of physics, selected divisions of mechanics, and mechanics of solids. Abbe was more than a teacher to Frege: he was a trusted friend, and, as director of the optical manufacturer Carl Zeiss AG, he was in a position to advance Frege's career. After Frege's graduation, they came into closer correspondence. His other notable university teachers were Christian Philipp Karl Snell (1806-86; subjects: use of infinitesimal analysis in geometry, analytical geometry of planes, analytical mechanics, optics, physical foundations of mechanics); Hermann Karl Julius Traugott Schaeffer (1824-1900; analytical geometry, applied physics, algebraic analysis, on the telegraph and other electronic machines); and the philosopher Kuno Fischer (1824-1907; Kantian and critical philosophy). Starting in 1871, Frege continued his studies in Gottingen, the leading university in mathematics in German-speaking territories, where he attended the lectures of Rudolf Friedrich Alfred Clebsch (1833-72; analytical geometry), Ernst Christian Julius Schering (1824-97; function theory), Wilhelm Eduard Weber (1804-91; physical studies, applied physics), Eduard Riecke (1845-1915; theory of electricity), and Hermann Lotze (1817-81; philosophy of religion). Many of the philosophical doctrines of the mature Frege have parallels in Lotze; it has been the subject of scholarly debate whether or not there was a direct influence on Frege's views arising from his attending Lotze's lectures. In 1873, Frege attained his doctorate under Ernst Christian Julius Schering, with a dissertation under the title of "Ueber eine geometrische Darstellung der imaginaren Gebilde in der Ebene" ("On a Geometrical Representation of Imaginary Forms in a Plane"), in which he aimed to solve such fundamental problems in geometry as the mathematical interpretation of projective geometry's infinitely distant (imaginary) points. Frege married Margarete Katharina Sophia Anna Lieseberg (15 February 1856 - 25 June 1904) on 14 March 1887.
QUESTION:
What did he study at Jena?