Sigma (disambiguation)
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Look up sigma in Wiktionary, the free dictionary. |
Sigma (Σ,σ) is a letter of the Greek alphabet.
Sigma may also refer to:
Aviation
- Advance Sigma, a Swiss paraglider design
Companies
- SIGMA (verification service), Nielsen Media Research's tracking system for videos
- Sigma AB, a Swedish IT consultancy company
- Sigma Corporation, a Japanese camera and lens manufacturer
- Sigma Designs, Inc., a US semiconductor manufacturer
- Sigma Motor Corporation, a South African motor vehicle assembler and manufacturer
- Sigma Motors, a Pakistani assembler of SUVs
- Sigma Pharmaceuticals, an Australian pharmaceutical company
- Sigma Sport, a German manufacturer of electronic sports equipment
- Sigma TV, a television channel in Cyprus
- Sigma-Aldrich, an American chemical company
- Telkomsigma or Sigma Cipta Caraka, an Indonesian ICT business solution provider
Films and television
- Ood Sigma, a fictional character from the Doctor Who series
- Space City Sigma, a 1980s Indian science fiction TV series
Mathematics
- Summation operator forming a series in mathematics Σ
- Standard deviation in statistics σ
- Divisor function in number theory σ
- Sigma-algebra (σ-algebra, σ-field) in set theory
- A busy beaver function in computability theory Σ
- or , sets in the analytical hierarchy
- , a set in the polynomial hierarchy
- Harish-Chandra's σ function
- Weierstrass sigma function
- Sigma additivity
Places
- Sigma, Capiz, a municipality in the Philippines
- Sigma, Lee County, Virginia, United States
- The Sigma Plan, to raise the dikes of the Scheldt River in Belgium
Products
- Sigma (sailplane)
- Mitsubishi Sigma
- GM Sigma platform, an automobile platform
- Smith & Wesson Sigma, a firearm
- Sigma Guitars
- The SDS Sigma series of computers from Scientific Data Systems
Science
- Stefan–Boltzmann constant of radiation in physics σ
- Sigma factor of RNA polymerase in biology σ
- In the Hammett equation, the electronic substituent constant σ for activation of substituted arenes
- Sigma baryon, in particle physics
- Pauli matrices in quantum physics
- Cross section σ in physics
- Sigma bond in chemistry σ
- Sigma receptor, a neural receptor
- Electrical conductivity, a measure of a material's ability to conduct electricity σ
- Stress (mechanics), the force per unit area applied by internal forces of a material σ
Video games
- Sigma (Mega Man X), a video game character
- Ninja Gaiden Sigma, a video game
- Sigma, a character in the BioShock 2 video game universe
- Sigma Harmonics, a video game
- Sigma, the protagonist in the game Zero Escape: Virtue's Last Reward
- Sigma, a team on the Dota 2 online video game
Other
- Sigma (duo), a British drum and bass duo
- Sigma AZ (band), punk rock band from Phoenix, Arizona
- Sigma (couch), used in ancient Roman banquets
- Sigma class corvette, a naval ship
- The Six Sigma quality management program
- SK Sigma Olomouc, a Czech association football team
See also
This article is issued from Wikipedia - version of the 9/9/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.