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  2. Contract bridge probabilities - Wikipedia

    en.wikipedia.org/wiki/Contract_bridge_probabilities

    This table [1] represents the different ways that two to eight particular cards may be distributed, or may lie or split, between two unknown 13-card hands (before the bidding and play, or a priori). The table also shows the number of combinations of particular cards that match any numerical split and the probabilities for each combination.

  3. Interstitial site - Wikipedia

    en.wikipedia.org/wiki/Interstitial_site

    [citation needed] In a close-packed structure there are 4 atoms per unit cell and it will have 4 octahedral voids (1:1 ratio) and 8 tetrahedral voids (1:2 ratio) per unit cell. [1] The tetrahedral void is smaller in size and could fit an atom with a radius 0.225 times the size of the atoms making up the lattice. An octahedral void could fit an ...

  4. Empty set - Wikipedia

    en.wikipedia.org/wiki/Empty_set

    In mathematics, the empty set or void set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. [1] Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set , while in other theories, its existence can be deduced.

  5. Betti number - Wikipedia

    en.wikipedia.org/wiki/Betti_number

    b 1 is the number of one-dimensional or "circular" holes; b 2 is the number of two-dimensional "voids" or "cavities". Thus, for example, a torus has one connected surface component so b 0 = 1, two "circular" holes (one equatorial and one meridional) so b 1 = 2, and a single cavity enclosed within the surface so b 2 = 1.

  6. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    In the United States, many math educators and boards of education have enthusiastically endorsed the National Council of Teachers of Mathematics (NCTM) standards and actively promoted the use of classroom calculators from kindergarten through high school. Calculators may in some circumstances be used within school and college examinations. In ...

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. List of voids - Wikipedia

    en.wikipedia.org/wiki/List_of_voids

    In the tables, z is the cosmological redshift, ... SRSS1 Void 1 14 21 h 28 m −29° 28′ 87.2 21.3 Piscis Austrinus/Microscopium: 15 21 h 24 m −33° 17′ 116.1

  9. Judge dumbfounded by error at site of 'suicide' where teacher ...

    www.aol.com/judge-dumbfounded-error-suicide...

    A judge told the parents of 27-year-old Ellen Greenberg, a Philadelphia teacher found dead with 20 stab wounds in 2011, that the city's declaration of suicide was "puzzling."