John Fraser (botanist) of botany and natural science." Species named after Fraser include, among others, "Abies fraseri" (Fraser Fir), "Magnolia fraseri" (Fraser Magnolia), and the gentianworts, "Frasera". A 50-foot Fraser Fir was used in 1998 as the U.S. Capitol Christmas Tree; the species was also used in 1974. The Fraser's Saint John's wort ("Triadenum fraseri") is named in honour of Fraser. John Fraser's letters are maintained at the Royal Society of Arts, and one of his portraits hung at the Hunt Library. Both Hoppner and Raeburn painted his portrait. Fraser was an elected fellow of both the Linnean Society of London (FLS 1810)
Search tree their node length, B-trees are optimized for systems that read large blocks of data. They are also commonly used in databases. The time complexity for searching a B-tree is O(log n). An (a,b)-tree is a search tree where all of its leaves are the same depth. Each node has at least a children and at most b children, while the root has at least 2 children and at most b children. a and b can be decided with the following formula: formula_1 The time complexity for searching an (a,b)-tree is O(log n). A ternary search tree is a type of