Vocation : Writers : Textbook/ Non-fiction

Leonard Carlitz (December 26, 1907 – September 17, 1999) was an American mathematician. Carlitz supervised 44 doctorates at Duke University and published over 770 papers.

Jan Theodoor Gerard Overbeek (Groningen, January 30, 1911 – February 19, 2007) was a Dutch professor of physical chemistry at the Utrecht University.

Jean Abraham Chrétien Oudemans (Amsterdam, 16 December 1827 – Utrecht, 14 December 1906) was a Dutch astronomer. He was the director of the Utrecht Observatory from 1875 until 1898, when he retired.
Oudemans was born in Amsterdam, son of the poet, teacher and philologist Anthonie Oudemans Sr. and Jacoba Adriana Hammecker. He entered Leiden University when he was just 16 as a student of the noted astronomer Frederik Kaiser. He became a high school teacher in Leiden when he was just 19 (1846). The next six years he worked on his dissertation on the determination of the latitude of Leiden. Next he studied asteroids and variable stars, meanwhile hoping for an academic appointment. In 1855 he became member of the Royal Netherlands Academy of Arts and Sciences.
He married Pauline Adriana Verdam (the daughter of a well-known mathematics professor Gideon Jan Verdam ) in 1856. In the same year he was appointed a professor at Utrecht University and became the first director of its observatory. However, his interest drew him towards geography. He traveled to the Dutch East Indies as head surveyor, and worked in that capacity for 18 years, publishing his works on the triangulation of the island of Java in six books.In 1874 he organized an astronomical expedition to the island of Réunion to observe the transit of Venus but, due to bad weather, the results were disappointing.Oudemans crater on Mars was named in his honor.
A brother was the botanist Corneille Antoine Jean Abram Oudemans. One of his sons was Anthonie Cornelis Oudemans Jzn, one of the fathers of cryptozoology.

Moritz Schönfeld (9 February 1880 – 4 October 1958) was a Dutch linguist who specialized in Germanic linguistics. Moritz Schönfeld was the author of several reference works on Germanic names and Dutch etymology which have been highly influential and are still in use today.

Joseph Jean-Baptiste Laurent Arban (28 February 1825 – 8 April 1889) was a cornetist, conductor, composer, pedagogue and the first famed virtuoso of the cornet à piston or valved cornet. He was influenced by Niccolò Paganini's virtuosic technique on the violin and successfully proved that the cornet was a true solo instrument by developing virtuoso technique on the instrument.

Mary Elizabeth Tidball (née Peters; October 15, 1929 – February 3, 2014) was an American physiologist. She was an advocate for women in academia and STEM and a supporter of women's colleges. Tidball was a longtime faculty member at George Washington University School of Medicine & Health Sciences (GW) where she became the institution's first woman appointed professor of physiology. Her research in the 1960s on the career outcomes of graduates from women's colleges versus those from coeducational institutions sparked discussions that continued for decades. Tidball was the first female president of the Cathedral Choral Society where she sang for almost fifty years.

Carl Mark Pearcy, Jr. (born August 25, 1935) is an American mathematician whose research has been concentrated on operator theory and operator algebras. He has coauthored several books, including "Introduction to Operator Theory I", Introduction to Analysis", and "Measure and integration", all published by Springer and coauthored by Arlen Brown (and Hari Bercovici in the case of Measure and integration). Pearcy had 31 Ph. D. students at Michigan and TAMU
, several of whom are outstanding mathematicians. Pearcy's bibliography contains more than 150 papers, and his research has concerned the invariant subspace problem and the theory of dual algebras.

Gustavo Rodríguez Vela (born Lima, 1968) is a Peruvian writer and communication expert, author of several novels and story books.

Hernán Jesús Garrido Lecca Montañez (born May 18, 1960) is a Peruvian economist, writer, producer, inventor and politician. A popular children's literature author in Peru, he is most recognized by his work Pirates in Callao, which was adapted into the first CGI motion picture in Peruvian cinematography. At political level, he is a member of the Peruvian Aprista Party, serving in Alan García's second administration as cabinet minister, from 2006 to 2008.Garrido Lecca graduated from the University of the Pacific with a major in economics. Subsequently, he attended Harvard Kennedy School and Massachusetts Institute of Technology, obtaining a Master's in Public Administration and a Master's of Science in Technology and Policy, respectively. He attained a PhD in Applied Economics at the University of Seville. His interest in literature led him to complete the master's program in Peruvian and Latin American Literature at the National University of San Marcos. He holds the rank of Major of the Peruvian Army (Reserve), and is a Private Pilot.After working in radio and television journalism in different media for more during the 1990s and publishing books in the fields of economics, science and technology, and consumer advocacy, Garrido Lecca entered politics by running for the Peruvian Congress at the 2001 general election with Union for Peru. Although not elected, he was recruited in the Peruvian Aprista Party as an advisor to former president Alan García. He was subsequently named the party's campaign manager for the 2006 general election.
At the start of the second presidency of Alan García in July 2006, Garrido Lecca was appointed Minister of Housing, Construction and Sanitation. In December 2007, he was rotated in the cabinet as Minister of Health. He resigned on October 14, 2008, amid the 2008 oil scandal, which led Alan García to sack his entire cabinet. Garrido Lecca was signaled as part of the scheme leading to the scandal, and currently remains under investigation alongside other former members of the administration.