Categories: Disambiguation Progressive music is an approach to music that can be applied to several different musical genres. ... The progressive rock band Yes performing in 1977. ... Progressive metal (shortened to prog, or prog metal when differentiating from progressive rock) is a heavy brand of progressive rock which is characterized by the use of complex compositional structures, odd time signatures, and other features. ... Progressive electronica (sometimes prog or proggy) is a collection of electronic music genres which draw upon progressive music, generally, and include the sub-styles of progressive trance, progressive house, progressive techno and progressive breaks. ... Progressivism or political progressivism is any of several historically related political philosophies or political ideologies. ... The term Progressive Party is used to describe several groups, both past and present, around the world. ... In the United States, the Progressive Era was a period of reform that began in Americas urban regions from, approximately the 1890s and lasted through the 1920s, although some experts say it lasted from 1900 to 1920. ... The Progressive Corporation (NYSE: PGR) is a U.S. auto insurance company. ... A company in the broadest sense is an aggregation of people who stay together for a common purpose. ... Auto insurance (or car insurance, motor insurance) is insurance consumers can purchase for cars, trucks, and other vehicles. ... The Progressive is an American monthly magazine of politics and culture with a pronounced left-of-center perspective. ... In politics, left-wing, political left, leftism, or simply the left, are terms which refer (with no particular precision) to the segment of the political spectrum typically associated with any of several strains of socialism, social democracy, or liberalism (especially in the American sense of the word), or with opposition... A collection of magazines A magazine is a periodical publication containing a variety of articles on various subjects. ... The progressive or continuous tenses of a verb are those denoting an incomplete action in progress at a specific time. ... Progressive lenses, also called progressive addition lenses, progressive power lenses or varifocal lenses, are glasses used to correct presbyopia when a person has some other refraction error such as myopia,hyperopia or astigmatism. ... // Definition Presbyopia is a condition that occurs with growing age and results in the inability of the human eye to focus on objects up close. ... In mathematics, a function f ∈ L2(R) is called progressive iff its Fourier transform is supported by positive frequencies only: . It is called regressive iff the time reversed function f(−t) is progressive, or equivalently, if . The complex conjugate of a progressive function is regressive, and vice versa. ... Mathematics is the study of quantity, structure, space and change. ... A photo of a flower compressed with successively higher compression ratios from left to right. ... Progressive scanning is a method for representing moving images on a display screen, where every pixel is represented in each frame. ... In film, video production, animation, and related fields, a frame is one of the many still images which compose the complete moving picture. ... In video, a field is one of the many still images which comprise a They are similar to frames, but they have half the vertical resolution and are displayed twice as fast. ... A progressive tax, or graduated tax, is a tax that is larger as a percentage of income for those with larger incomes. ...