Several major strands of more abstract mathematics ( including invariant theory, the Italian school of algebraic geometry, and Felix Klein's Erlangen programme leading to the study of the classical groups ) built on projective geometry.

Several of his paintings are abstract, though some of his major successes were with ( partly ) figurative work: for instance, the cycle based on the myth of Orpheus which he produced in Boston, the cycle based on Homer ’ s Iliad he produced after his return to Antwerp.

Several strategy games, such as Rise of Nations, Rome: Total War, Spartan Total Warrior, Empire Earth, Civilization, Ancient Wars: Sparta, Age of Empires, Etrian Odyssey III: The Drowned City and Age of Mythology, feature infantry units called " Hoplites " or " Phalanx ".

Several broadcasters, including the CBC, have argued that there is no viable business case for a comprehensive digital conversion strategy in Canada.

Several assumptions about the nature and functioning of organizations are made in the choice of a particular strategy.

Several authors have proposed circumcision as a possible strategy for penile cancer prevention ; however, the American Cancer Society point to the rarity of the disease and note that neither the American Academy of Pediatrics nor the Canadian Academy of Pediatrics recommend routine neonatal circumcision.

Several boss fights have been praised for their variety and strategy required to beat them.

Several Axé music groups such as " É o Tchan " have as part of their marketing strategy to always release a choreography together with every one of their songs ; therefore, Samba Axé is an ever-changing kind of dance with no commitment to maintaining any formal set of steps or routines ( there's actually no such a thing as a basic step in Samba Axé.

Several articles published by the PLA ’ s Academy of Military Science ( AMS ) journal Zhongguo Junshi Kexue, for example, examine psychological warfare and psychological operations mainly as a deception-oriented function of military strategy.

Several shifts in the advertising and media industry have caused IMC to develop into a primary strategy for marketers:

Several teams adopted a pit strategy whereby they filled their cars with fuel early in the race, attempting to save enough fuel under the safety car to avoid having to stop again.

Several conclusion are used for the game's strategy.

Several bosses await the heroes, and it's up to the player's strategy to choose which hero ( es ) will fight the boss.

Several experiments have already been performed based on this strategy.

Several ideas from this version, including the music track listing and the replacement of sidebar command buttons by a context-sensitive cursor, were used in Westwood's next strategy game, Command & Conquer.

Several simple games can be played to select one person from a group, either as a straightforward winner, or as someone who is eliminated.

Several incomplete sets of this form of croquet are known to exist, and one complete set is still used for demonstration games in the West of Scotland.

Several games involve a skill such as scoring a ping-pong or darts.

Several popular drinking games involving cards are asshole, fuck the dealer, horserace, Kings, liar's poker, pyramid, bloody knuckles, Ring of Fire, Toepen, ride the bus, and Black or Red.

Several of the Pokémon games have also received director's cuts and have used the term " extension ," though " remake " and " third version " are also often used by many fans.

Several of his games were published in Germany but never in the United States.

Several shorter-lived high stakes games also were attempted around the time of the millennium, such as Winning Lines, The Chair, and Greed.

Several video games are based on or influenced heavily by Lovecraft such as Call of Cthulhu: Dark Corners of the Earth, Shadow of the Comet, Prisoner of Ice, Shadowman, Alone in the Dark, Chzo Mythos, Eternal Darkness: Sanity's Requiem, Cthulhu Saves the World, Sherlock Holmes: The Awakened, Amnesia: The Dark Descent, Dead Space, Splatterhouse, Darkness Within: In Pursuit of Loath Nolder, Penumbra, and Quake.

Several Nintendo Wii games take advantage of such a system.

Several versions of the Nights theme song " Dreams Dreams " appear throughout the games in the series.

Several non-commercial email games played on the Internet and BITNET predate these.

Several varieties of RPG also exist in electronic media, such as multi-player text-based MUDs and their graphics-based successors, massively multiplayer online role-playing games ( MMORPGs ).

Several more recent games have been, in turn, influenced by Risus.

Several Sega Master System games have been added to the Wii's Virtual Console, many of which are games that had also been released on the Game Gear.

Several games can be played with these cards, all involving the concept of a set.

Several weeks later, the three parties came to an accord in which the NADA would move its convention date to the original Super Bowl week in exchange for financial and other considerations, including promotional spots shown during selected regular season NFL games.

Several computer and video games, both licensed and unlicensed, have been based on the story.

Several games of the series are considered seminal games of their genre.

Several action games also focused on mental challenges, including the action-puzzle hybrid Q * bert from 1982.

Several dozen puzzle video games were created in the 1990s, with many games allowing players to arrange falling blocks as seen in Tetris.

Several firms are merchandising enzyme preparation through feed manufacturers.

Several instances of popular etymology are attested from ancient authors.

Several fully worked numerical examples are available.

Several unusual applications, such as a nuclear battery or fuel for space ships with nuclear propulsion, have been proposed for the isotope < sup > 242m </ sup > Am, but they are as yet hindered by the scarcity and high price of this nuclear isomer.

Several other oxidation states are known, which range from + 2 to + 7 and can be identified by their characteristic optical absorption spectra.

Several genera are popular with the horticultural community, including marigold, pot marigold ( also known as calendula ), cone flowers, various daisies, fleabane, chrysanthemums, dahlias, zinnias, and heleniums.

Several major cities exist either in the Andes or in the foothills, among which are Bogotá, Medellín and Cali, Colombia ; Quito, Ecuador ; Mérida, Venezuela ; La Paz, Bolivia ; Santiago, Chile, and Cusco, Peru.

Several species are raised for amaranth " grain " in Asia and the Americas.

Several cultivars are known, such as ' Albus ' ( with white flowers ), ' Sapphire ' ( dark blue flowers ), ' Aureus ' ( leaves striped with yellow ), and ' Variegatus ' ( leaves almost entirely white with a few green bands ).

Several organizations concerned with antimicrobial resistance are lobbying to eliminate the unnecessary use of antibacterials.

Several new features, including better scalability, enhanced clustering and management capabilities are mentioned.

Several manufacturers produce specialised acoustic guitar amplifiers, which are designed to give undistorted and full-range reproduction.

Combinations of the above techniques produce a " hybrid " or " hyphenated " technique .< ref name =" pmid9008869 "> Several examples are in popular use today and new hybrid techniques are under development.

Several anthems are included in the British coronation service.

Several proteins are involved, but two main methods of regulation have been identified: targeting mitochondria functionality, or directly transducing the signal via adaptor proteins to the apoptotic mechanisms.

Several crystal structures are known for AC-II enzymes.

Several other incidents connected with the story of Aeacus are mentioned by Ovid.

Several of its later bishops are known: Marinus in 325 ; Niconius in 344 ; Sylvanus at the beginning of the 5th century ; Pionius in 451 ; Leo in 787 ; Peter, friend of the Patriarch Ignatius, and adversary to Michael, in the ninth century.

Several roller coasters are specifically known by this name, including ;

Several crashed airplanes and large equipment such as bulldozers are scattered around the island.

Several topics that might be covered here are instead covered there because much more can be said about them in a human context.

Several areas at the edge of the neocortex, including the hippocampus and amygdala, are also much more extensively developed in mammals than in other vertebrates.

Several of the heavier bromine isotopes from fission are delayed neutron emitters.

Several English scholars and churchmen are described by Bede as being fluent in Greek due to being taught by him.