O que (quem) é R (cross section ratio) - definição
Cross section (geology)
![A cross section of the [[Anadarko Basin]]. The letters A and B at the top correspond to the line labeled A--B on the smaller map. In this example, the vertical scale is exaggerated compared to the horizontal scale.](https://commons.wikimedia.org/wiki/Special:FilePath/Anadarko Basin Geologic Cross Section.png?width=200 "A cross section of the [[Anadarko Basin]]. The letters A and B at the top correspond to the line labeled A--B on the smaller map. In this example, the vertical scale is exaggerated compared to the horizontal scale.")
![dike]] cutting through, with the map of its surface expression showing [[strike and dip]] information](https://commons.wikimedia.org/wiki/Special:FilePath/Anticline and a dike in cross section.png?width=200 "dike]] cutting through, with the map of its surface expression showing [[strike and dip]] information")
GEOLOGIC CROSS SECTIONS
Draft:Cross section (geology); Geological cross section
A cross section or cross-section, in geology, is a diagram representing the geologic features intersecting a vertical plane, and is used to illustrate an area’s structure and stratigraphy that would otherwise be hidden underground. The features described in a cross section can include rock units, faults, topography, and more.
cross section
WIKIMEDIA DISAMBIGUATION PAGE
Cross-section; Cross sections; Crosssection; Cross Section; Cross section (disambiguation); Cross-sections; Cross-Section; Plane of view
see cross-section
Cross-ratio
INVARIANT UNDER PROJECTIVE TRANSFORMATIONS
Cross ratio; Cross Ratio; Anharmonic ratio; Cross-Ratio; Projective invariant; Projective invariants; Six cross-ratios; Anharmonic group; Harmonic cross-ratio
In geometry, the cross-ratio, also called the double ratio and anharmonic ratio, is a number associated with a list of four collinear points, particularly points on a projective line. Given four points A, B, C and D on a line, their cross ratio is defined as
Wikipédia
R (cross section ratio)
R is the ratio of the hadronic cross section to the muon cross section in electron–positron collisions:
