Crossocheilus cobitis for mathematics and from 1958 to 1960 an assistant professor at Queen's University. He was from 1962 to 1963 a visiting associate professor, from 1963 to 1969 an associate professor, and from 1969 until his retirement a full professor at Princeton University. From 1962 to 1986 he was an associate director for Princeton University's data center. Trotter's research dealt with, among other topics, probability theory, group theory computations, number theory, and knot theory. In 1963, he solved an open problem in knot theory by proving that there are non-invertible knots. At the time of his proof	Hale Trotter
18129381	, all knots with up to 7 crossings were known to be invertible. Trotter described an infinite number of pretzel knots that are not invertible. Hale Trotter Hale Freeman Trotter (30 May 1931 – 17 January 2022) was a Canadian-American mathematician, known for the Lie–Trotter product formula, the Steinhaus–Johnson–Trotter algorithm, and the Lang–Trotter conjecture. He was born in Kingston, Ontario. He died in Princeton, New Jersey on January 17, 2022. Trotter studied at Queen's University in Kingston with bachelor's degree in 1952 and master's degree in 1953. He received in 1956 his PhD from 	Hale Trotter
18129382	Hatje Cantz Verlag Hatje Cantz Verlag Hatje Cantz Verlag (English: Hatje Cantz Publishing) is a German book publisher specialising in photography, art, architecture and design. It was established in 1945 by Gerd Hatje and has offices in Stuttgart and Berlin. Hatje Cantz Verlag has a backlist of nearly 800 titles. Its photography books cover documentary and editorial photography, political and social issues, and landscape; its art books cover fine art and conceptual art. Hatje Cantz has been part of the Ganske Publishing Group since 2011. History. The publisher was established in 1945 by Gerd Hatje. In 1990 it was sold to J. Fink 	Hatje Cantz Verlag
18129383	Holding. After the bankruptcy of J. Fink Holding in 2011, Hatje Cantz Verlag became part of the Ganske Publishing Group. Books. Hatje Cantz has a backlist of nearly 800 titles, including the following: Hatje Cantz Verlag Hatje Cantz Verlag (English: Hatje Cantz Publishing) is a German book publisher specialising in photography, art, architecture and design. It was established in 1945 by Gerd Hatje and has offices in Stuttgart and Berlin. Hatje Cantz Verlag has a backlist of nearly 800 titles. Its photography books cover documentary and editorial photography, political and social issues, and landscape; its art books cover fine art 	Hatje Cantz Verlag
18129384	Listed buildings in Chetwynd, Shropshire Listed buildings in Chetwynd, Shropshire Chetwynd is a civil parish in the district of Telford and Wrekin, Shropshire, England. It contains 32 listed buildings that are recorded in the National Heritage List for England. Of these, three are listed at Grade II*, the middle of the three grades, and the others are at Grade II, the lowest grade. The parish contains the Chetwynd Park estate, and the small settlements of Pickstock, Howle, and Sambrook, and is otherwise completely rural. Some of the listed buildings are associated with the Chetwynd Park estate, and most of the others are houses and associated 	Listed buildings in Chetwynd, Shropshire
18129385	structures, farmhouses and farm buildings. Also listed are two churches, a medieval cross, water mills, bridges, a former windmill, and a war memorial. Listed buildings in Chetwynd, Shropshire Chetwynd is a civil parish in the district of Telford and Wrekin, Shropshire, England. It contains 32 listed buildings that are recorded in the National Heritage List for England. Of these, three are listed at Grade II*, the middle of the three grades, and the others are at Grade II, the lowest grade. The parish contains the Chetwynd Park estate, and the small settlements of Pickstock, Howle, and Sambrook, and is otherwise 	Listed buildings in Chetwynd, Shropshire
18129386	Crossocheilus cobitis Crossocheilus cobitis Crossocheilus cobitis is a species of ray-finned fish in the genus Crossocheilus". It is native to the Mekong basin and Indonesia and Malaysia. Crossocheilus cobitis Crossocheilus cobitis is a species of ray-finned fish in the genus "Crossocheilus". It is native to the Mekong basin and Indonesia and Malaysia.