terrestrial triangle - определение. Что такое terrestrial triangle
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Что (кто) такое terrestrial triangle - определение

TIME STANDARD FOR ASTRONOMICAL OBSERVATIONS FROM THE EARTH
Terrestrial time; Terrestrial Dynamical Time; Terrestrial Dynamic Time; Terrestrial dynamic time; Terrestrial dynamical time

equilateral         
  • An equilateral triangle. It has equal sides (<math>a = b = c</math>), equal angles (<math>\alpha = \beta =\gamma</math>), and equal altitudes (<math>h_a = h_b = h_c</math>).
  • Construction of equilateral triangle with compass and straightedge
  • 3}}/2}}.
  • The equilateral triangle tiling fills the plane.
  • A regular tetrahedron is made of four equilateral triangles.
GEOMETRIC SHAPE WITH THREE SIDES OF EQUAL LENGTH
Equilateral triangles; Equalangular triangle; Equiangular triangle; Equilateral Triangles; Equilateral Triangle; Regular Triangle; Regular triangle; Equalateral triangle; Equilateral; Isopleuron
[?i:kw?'lat(?)r(?)l, ??kw?-]
¦ adjective having all its sides of the same length.
Origin
C16: from Fr. equilateral or late L. aequilateralis, from aequilaterus 'equal-sided' (based on L. latus, later- 'side').
Subclavian triangle         
SMALLER DIVISION OF THE POSTERIOR TRIANGLE
Omoclavicular triangle; Supraclavicular triangle
The subclavian triangle (or supraclavicular triangle, omoclavicular triangle, Ho's triangle), the smaller division of the posterior triangle, is bounded, above, by the inferior belly of the omohyoideus; below, by the clavicle; its base is formed by the posterior border of the sternocleidomastoideus.
Pascal's triangle         
  • Visualisation of binomial expansion up to the 4th power
  • a4 white rook
  • b4 one
  • c4 one
  • b3 two
  • c3 three
  • d3 four
  • c2 six
  • [[Fibonacci sequence]] in Pascal's triangle
  • Each frame represents a row in Pascal's triangle. Each column of pixels is a number in binary with the least significant bit at the bottom. Light pixels represent ones and the dark pixels are zeroes.
  • In Pascal's triangle, each number is the sum of the two numbers directly above it.
  • A level-4 approximation to a Sierpinski triangle obtained by shading the first 32 rows of a Pascal triangle white if the binomial coefficient is even and black if it is odd.
  • Pascal]]'s version of the triangle
  • rod numerals]], appears in [[Jade Mirror of the Four Unknowns]], a mathematical work by [[Zhu Shijie]], dated 1303.
TRIANGULAR ARRAY OF THE BINOMIAL COEFFICIENTS IN MATHEMATICS
Pascals triangle; Pascals Triangle; Pascal's Triangle; Yang Hui's triangle; Pascal triangle; Khayyam-Pascal's triangle; Binomial triangle; Yanghui Triangle; Yanghui's triangle; Pascals tringle; Pascals triagle; Khayyam-Pascal triangle; Yang Hui's Triangle; Tartaglia's triangle; Khayyam triangle; Khayyám triangle; Yanghui triangle; Chinese's triangle; Triangle of Pascal; Triangle's Pascal; Pascal’s triangle; D-triangle number; Meru Prastara
In mathematics, Pascal's triangle is a triangular array of the binomial coefficients that arises in probability theory, combinatorics, and algebra. In much of the Western world, it is named after the French mathematician Blaise Pascal, although other mathematicians studied it centuries before him in India,Maurice Winternitz, History of Indian Literature, Vol.

Википедия

Terrestrial Time

Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of Earth. For example, the Astronomical Almanac uses TT for its tables of positions (ephemerides) of the Sun, Moon and planets as seen from Earth. In this role, TT continues Terrestrial Dynamical Time (TDT or TD), which succeeded ephemeris time (ET). TT shares the original purpose for which ET was designed, to be free of the irregularities in the rotation of Earth.

The unit of TT is the SI second, the definition of which is based currently on the caesium atomic clock, but TT is not itself defined by atomic clocks. It is a theoretical ideal, and real clocks can only approximate it.

TT is distinct from the time scale often used as a basis for civil purposes, Coordinated Universal Time (UTC). TT is indirectly the basis of UTC, via International Atomic Time (TAI). Because of the historical difference between TAI and ET when TT was introduced, TT is approximately 32.184 s ahead of TAI.