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When a surface has a constant zero Gaussian curvature, then it is a developable surface and the geometry of the surface is Euclidean geometry.. When a surface has a constant positive Gaussian curvature, then the geometry of the surface is spherical geometry.
Sisi Zlatanova is a Bulgarian/Dutch researcher in geospatial data, geographic information systems, and 3D modeling.She works as a professor in the faculty of the Built Environment, at the University of New South Wales (UNSW), [1] and is president of Technical Commission IV (Spatial Information Science) of the International Society for Photogrammetry and Remote Sensing.
A light source passes behind a gravitational lens (invisible point mass placed in the center of the image). The aqua circle is the light source as it would be seen if there were no lens, while white spots are the multiple images of the source (see Einstein ring).
Slow motion computer simulation of the black hole binary system GW150914 as seen by a nearby observer, during 0.33 s of its final inspiral, merge, and ringdown.The star field behind the black holes is being heavily distorted and appears to rotate and move, due to extreme gravitational lensing, as spacetime itself is distorted and dragged around by the rotating black holes.
In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable.The general form of its probability density function is [2] [3] = ().
Part of a parabola (blue), with various features (other colours). The complete parabola has no endpoints. In this orientation, it extends infinitely to the left, right, and upward.
Li Sisi (Chinese: 李思思; pinyin: Lǐ Sīsī; born 4 November 1986) is a Chinese television host and media personality. She rose to fame in 2006 when she earned a third-place finish on the reality TV show Host Challenge . [ 1 ]
8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...