Geometry is an album by Brazilian jazz saxophonist Ivo Perelman featuring American pianist Borah Bergman, which was recorded in 1996 and released on the English Leo label.
Reception
In his review for AllMusic, Alex Henderson says that "this CD doesn't quite fall into the 'essential' category... Nonetheless, Geometry is an enjoyable release that Perelman's more-devoted followers will want."
The Penguin Guide to Jazz notes that "Bergman is wily enough to find ways of both supporting and undercutting the mighty sound of the tenor."
Track listing
Personnel
References
In mathematics, specifically geometric group theory, a geometric group action is a certain type of action of a discrete group on a metric space.
Definition
In geometric group theory, a geometry is any proper, geodesic metric space. An action of a finitely-generated group G on a geometry X is geometric if it satisfies the following conditions:
Uniqueness
If a group G acts geometrically upon two geometries X and Y, then X and Y are quasi-isometric. Since any group acts geometrically on its own Cayley graph, any space on which G acts geometrically is quasi-isometric to the Cayley graph of G.
Examples
Cannon's conjecture states that any hyperbolic group with a 2-sphere at infinity acts geometrically on hyperbolic 3-space.
References
Geometry is the second album by electronic musician Jega, released in 2000 on the Planet Mu label.
Track listing
External links
Sirius (/ˈsɪriəs/) is the brightest star (in fact, a star system) in the Earth's night sky. With a visual apparent magnitude of −1.46, it is almost twice as bright as Canopus, the next brightest star. The name "Sirius" is derived from the Ancient Greek Σείριος (Seirios), meaning "glowing" or "scorcher". The system has the Bayer designation Alpha Canis Majoris (α CMa). What the naked eye perceives as a single star is actually a binary star system, consisting of a white main-sequence star of spectral type A1V, termed Sirius A, and a faint white dwarf companion of spectral type DA2, called Sirius B. The distance separating Sirius A from its companion varies between 8.2 and 31.5 AU.
Sirius appears bright because of both its intrinsic luminosity and its proximity to Earth. At a distance of 2.6 parsecs (8.6 ly), as determined by the Hipparcos astrometry satellite, the Sirius system is one of Earth's near neighbors. Sirius is gradually moving closer to the Solar System, so it will slightly increase in brightness over the next 60,000 years. After that time its distance will begin to increase and it will become fainter, but it will continue to be the brightest star in the Earth's sky for the next 210,000 years.
Sean Thackrey is an American winemaker based in Marin County, California in the town of Bolinas. From a background as director of an art gallery, Thackrey has been described as an unconventional winemaker who has done pioneering work in promoting California Syrah.
Career
Thackrey studied art history at Reed College in Portland, OR, and the University of Vienna, but without graduating. He moved to Bolinas in 1964 and for a while worked as a book editor for the Sierra Club. In 1970, Thackrey, with Susan Thackrey and Cynthia Pritzker, opened the art gallery in San Francisco that became Thackrey & Robertson, by then in partnership with watercolorist Sally Robertson; the gallery remained operational until closed in 1995. Thackrey's particular expertise was in early photography, in exhibiting which the gallery was an internationally renowned pioneer.
After several years in Berkeley and San Francisco, Thackrey moved back to Bolinas in 1977. Following initial winemaking experiments with Cabernet Sauvignon grapes purchased from Fay Vineyard in Napa Valley, Thackrey became a bonded winemaker in 1981, as the Thackrey & Co. winery. Some early problems with lactobacillus led Thackrey to take extension courses at UC Davis, although he states he has little use for the scientific approach to winemaking.
Sirius Entertainment was an American comic book company which celebrated 15 years of publishing in 2009. Sirius has published popular titles such as Dawn, Poison Elves, Akiko, and Mark Smylie's epic fantasy Artesia series during its first years.