Several fields of discrete mathematics, particularly theoretical computer science, graph theory, and combinatorics, are important in addressing the challenging bioinformatics problems associated with understanding the tree of life.

Several institutions, besides those already mentioned, played important parts.

Several billion kilograms of polyesters are produced industrially annually, important products being polyethylene terephthalate, acrylate esters, and cellulose acetate.

Several important cinematic movements, including the Nouvelle Vague, began in the country.

Several types are existent in Qing dynasty and used in dishes of stewing hams ( 火腿炖肘子 ), and vegetables, or for a wide variety of soup and important soup stocks.

Several important institutional changes took place in this period, such as free and mandatory schooling introduced 1842 ( as first country in the world ), the abolishment of a previous national monopoly on trade in handicrafts in 1846, and a stock company law in 1848.

His critically acclaimed book Lyrics on Several Occasions of 1959, an amalgam of autobiography and annotated anthology, is an important source for studying the art of the lyricist in the golden age of American popular song.

Several formerly important franchise courts were not officially abolished until Courts Act of 1971.

Several important buildings and structures were built during this time, including the Kansas City City Hall and the Jackson County Courthouse — both added new skyscrapers to the city's growing skyline.

Several industry groups also recognize light pollution as an important issue.

Several types of molecules are particularly important during morphogenesis.

Several of the more important ways observations can be affected by human psychology are given below.

Several other important engravers also made cards, including Master ES and Martin Schongauer.

Several economically important products come from Rosaceae, including many edible fruits ( such as apples, apricots, plums, cherries, peaches, pears, raspberries, and strawberries ), almonds, and ornamental trees and shrubs ( such as roses, meadowsweets, photinias, firethorns, rowans, and hawthorns ).

Several Referendums supported the state being in control of the most important utilities and energy companies.

Several important modern cities, including Stockholm and Lviv, were founded in the 1250s.

Several important cultural achievements were made in the decade, including publication of Roger Bacon's important scientific work Opus Majus and Thomas Aquinas ' Summa contra Gentiles.

Several lakesthe most important of which are Lake Herăstrău, Lake Floreasca, Lake Tei, and Lake Colentinastretch across the northern parts of the city, along the Colentina River, a tributary of the Dâmbovița.

Several singular oak trees, such as the Royal Oak in Britain and the Charter Oak in the United States, are of great historical or cultural importance ; for a list of important oaks, see Individual oak trees.

Several important trade routes from India and China ( including the Silk Road ) passed through Bactria and, as early as the Bronze Age, this had allowed the accumulation of vast amounts of wealth by the mostly nomadic population.

Several of Gauthier's students are now important moral, political, and legal philosophers in the United States and Canada.

Several important features of visual perception can be traced to the retinal encoding and processing of light.

Several important diseases of the nervous system are associated with dysfunctions of the dopamine system.

Several of the replies to Mr. Toynbee, without conscious resort to the traditional terminology with regard to the permission of evil, succeed in restoring the actual context in which present moral and political decisions must be made, by distinguishing between choosing a great evil and choosing in danger of this evil.

Several New England realtors were invited to participate in a small colloquium of property lawyers, political scientists, economists, social psychologists, social ethicists and theologians.

Several liberals, including Adam Smith and Richard Cobden, argued that the free exchange of goods between nations could lead to world peace, a view recognised by such modern American political scientists as Dahl, Doyle, Russet, and O ' Neil.

Several of them gained their positions through the patronage of Yasser Arafat, who balanced above the different factions, and the era after his death in 2004 has seen increased infighting among these groups, who jockey for influence over future development, the political line, funds, and constituencies.

Several parliamentarians had been killed during the political unrest.

Several incarnations of political groups promoting lesbian issues have evolved ; 13 lesbian organizations were active in Mexico City in 1997.

Several months later, it amalgamated with the prestigious First Normal School of Changsha, widely seen as the best school in Hunan province ; Mao biographer Stuart Schram would later note that the environment of the school provided " an ideal training ground for his apprenticeship as a political worker.

Several different political spectrums have been proposed.

Several monarchies remain, and the Middle East is the only part of the world where several large states are ruled by monarchs with almost complete political control.

Several major political parties of the pre-war era, such as the National Christian Democrat Peasant's Party ( PNŢCD ), the National Liberal Party ( PNL ) and the Romanian Social Democrat Party ( PSDR ) were resurrected.

Several key programs focus on local political and world issues.

Several political parties have been formed with government approval but have yet to show interest in advocating alternatives to government policy.

* Several Albanian political parties in Kosovo voice union with Albania

Several previous unsuccessful attempts to unite the colonies were made, with proposed political models ranging from unitary, to loosely federal.

Several of Iolanthe's themes are continued from Patience, including the war between the sexes and the satire on legal and political themes.

Several anti-corporate and not-for-profit forms of alternative protest have surfaced in the punk underground, such as self-made publications known as zines, where there is greater freedom to discuss controversial ( usually far left ) political issues such as discrimination, LGBT community issues, feminism, antitheism, and veganism.

Several political parties were formed and jostled for independence and economic development.

Several registered political parties are active and represented in the National Assembly, although Swapo Party has won every election since independence.

Several prominent German military, cultural, and political figures in subsequent history, including poet Theodor Fontane, General Hermann von François, the hero of the First World War Battle of Tannenberg, Luftwaffe General and fighter ace Adolf Galland ; and famed U-boat captain Lothar von Arnauld de la Perière, trace their ancestry to the Huguenot refugees from France.

Several lineages are grouped into a political unit headed by a chief and a council of elders, each of whom is the elected head of a lineage — which itself may include multiple extended-family households.

* Several televangelists are very active in the national or international political arena ( e. g., Pat Robertson, Jerry Falwell, Jimmy Swaggart, John Hagee ), and often espouse conservative politics on their programs.

Several prominent Marquesan political leaders have repeatedly declared themselves in favor of separating from French Polynesia and remaining within the French Republic in case French Polynesian political leaders in Tahiti would proclaim the independence of French Polynesia.