enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Construction of a complex null tetrad - Wikipedia

    en.wikipedia.org/wiki/Construction_of_a_complex...

    Only after the tetrad {,,, ¯} gets constructed can one move forward to compute the directional derivatives, spin coefficients, commutators, Weyl-NP scalars, Ricci-NP scalars and Maxwell-NP scalars and other quantities in NP formalism. There are three most commonly used methods to construct a complex null tetrad:

  3. Tetrad formalism - Wikipedia

    en.wikipedia.org/wiki/Tetrad_formalism

    The tetrad formalism is an approach to general relativity that generalizes the choice of basis for the tangent bundle from a coordinate basis to the less restrictive choice of a local basis, i.e. a locally defined set of four [a] linearly independent vector fields called a tetrad or vierbein. [1]

  4. Tetrad (meiosis) - Wikipedia

    en.wikipedia.org/wiki/Tetrad_(meiosis)

    The tetrad is the four spores produced after meiosis of a yeast or other Ascomycota, Chlamydomonas or other alga, or a plant. After parent haploids mate, they produce diploids. Under appropriate environmental conditions, diploids sporulate and undergo meiosis. The meiotic products, spores, remain packaged in the parental cell body to produce ...

  5. Tetrad (geometry puzzle) - Wikipedia

    en.wikipedia.org/wiki/Tetrad_(geometry_puzzle)

    In geometry, a tetrad is a set of four simply connected disjoint planar regions in the plane, each pair sharing a finite portion of common boundary. It was named by Michael R. W. Buckley in 1975 in the Journal of Recreational Mathematics .

  6. Synthesis-dependent strand annealing - Wikipedia

    en.wikipedia.org/wiki/Synthesis-dependent_strand...

    Data based on tetrad analysis from several species of fungi show that only a minority (on average about 34%) of recombination events during meiosis are COs (see Whitehouse, [21] Tables 19 and 38 for summaries of data from S. cerevisiae, Podospora anserina, Sordaria fimicola and Sordaria brevicollis).

  7. Frame fields in general relativity - Wikipedia

    en.wikipedia.org/wiki/Frame_fields_in_general...

    In this book, a frame field is called a tetrad (not to be confused with the now standard term NP tetrad used in the Newman–Penrose formalism). See Section 98. De Felice, F.; Clarke, C. J. (1992). Relativity on Curved Manifolds. Cambridge: Cambridge University Press. ISBN 0-521-42908-0. See Chapter 4 for frames and coframes. If you ever need ...

  8. Problems and Theorems in Analysis - Wikipedia

    en.wikipedia.org/wiki/Problems_and_Theorems_in...

    Problems and Theorems in Analysis (German: Aufgaben und Lehrsätze aus der Analysis) is a two-volume problem book in analysis by George Pólya and Gábor Szegő. Published in 1925, the two volumes are titled (I) Series. Integral Calculus. Theory of Functions.; and (II) Theory of Functions. Zeros. Polynomials. Determinants. Number Theory. Geometry.

  9. Tetrad of media effects - Wikipedia

    en.wikipedia.org/wiki/Tetrad_of_media_effects

    A blank tetrad diagram. Marshall McLuhan's tetrad of media effects [1] uses a tetrad - a four-part construct - to examine the effects on society of any technology/medium (that is, a means of explaining the social processes underlying the adoption of a technology/medium) by dividing its effects into four categories and displaying them simultaneously.