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Haffner Og Haagaas
''Haffner og Haagaas'' ("Haffner and Haagaas") was a Norwegian series of textbooks in mathematics published in numerous editions between 1925 and 1979, which were the most widely used textbooks in its field in Norwegian secondary schools for half a century. The series was originally edited by Theodor Haagaas Theodor Christian Petersen Haagaas (15 June 1873, Tistedalen – 25 December 1961, Oslo) was a Norwegian mathematician and private school owner. He was a co-owner of Frogner School and Nissen's Girls' School (1913–1918) and founder, owner ... and Einar Haffner, for whom it was named. Theodor Haagaas and Einar Haffner were joint editors from 1925 to Haffner's death in 1935, and Haagaas was sole editor from 1935 to 1959. In 1959, Harald Sogn replaced Haagaas as editor. The last editions were edited by Kjell Gjævenes. The series was originally published by H.J. Haffners Forlag, and was later published by N. W. Damm & Søn. Prior to 1940, some editions appeared under th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematics
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics with the major subdisciplines of number theory, algebra, geometry, and analysis, respectively. There is no general consensus among mathematicians about a common definition for their academic discipline. Most mathematical activity involves the discovery of properties of abstract objects and the use of pure reason to prove them. These objects consist of either abstractions from nature orin modern mathematicsentities that are stipulated to have certain properties, called axioms. A ''proof'' consists of a succession of applications of deductive rules to already established results. These results include previously proved theorems, axioms, andin case of abstraction from naturesome basic properties that are considered true starting points of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodor Haagaas
Theodor Christian Petersen Haagaas (15 June 1873, Tistedalen – 25 December 1961, Oslo) was a Norwegian mathematician and private school owner. He was a co-owner of Frogner School and Nissen's Girls' School (1913–1918) and founder, owner and headmaster of the Haagaas School, a private gymnasium at Frogner, Oslo that existed 1915–1955. He is also known for the widely used '' Haffner og Haagaas'' series of textbooks in mathematics, which was published between 1925 and 1979 in numerous editions. He received the King's Medal of Merit in Gold in 1949. Background He grew up in Tistedalen outside Frederikshald, where his father Theodor Christian Haagaas (1823–1899) was the managing director (1862–1892) of the sawmills of Saugbrugsforeningen, Norway's largest timber company. His father lived at Veden Manor in Tistedalen. Theodor Haagaas was one of the pioneers of skiing in Tistedalen around 1885–1886. He was the father of four daughters, among them Henriette Bie Lorent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Einar Haffner
Einar is a Scandinavian given name deriving from the Old Norse name Einarr, which according to Guðbrandur Vigfússon is directly connected with the concept of the einherjar, warriors who died in battle and ascended to Valhalla in Norse mythology. Vigfússon comments that 'the name Einarr is properly = einheri" and points to a relation to the term with the Old Norse common nouns ''einarðr'' (meaning "bold") and ''einörð'' (meaning "valour").Vigfusson (1874:121). Einar as given name * Einár (rapper) (2002–2021), Swedish rapper *Einar Jan Aas Einar Jan Aas (born 12 October 1955) is a Norwegian former footballer who played as a central defender. He was the first Norwegian to play professionally in England and Germany. Club career Aas started his career in Moss FK in 1973. In 1976, they ... (born 1955), Norwegian footballer *Einar Arnórsson (1880–1955), Icelandic politician *Einar Axelsson (1895–1971), Swedish actor *Einar Benediktsson (1864–1940), Icelandic poet a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
