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  2. Covering groups of the alternating and symmetric groups

    en.wikipedia.org/wiki/Covering_groups_of_the...

    For n = 5, the Schur cover of the alternating group is given by SL(2, 5) → PSL(2, 5) ≅ A 5, which can also be thought of as the binary icosahedral group covering the icosahedral group. Though PGL(2, 5) ≅ S 5 , GL(2, 5) → PGL(2, 5) is not a Schur cover as the kernel is not contained in the derived subgroup of GL(2 ,5).

  3. Eight-man football defensive formations - Wikipedia

    en.wikipedia.org/wiki/Eight-man_football...

    The 4-2-2 defense consists of two tackles, two ends, two linebackers, and two defensive backs. This defense is generally considered to be a balance between run and pass defense. The line consists of two tackles and two ends.

  4. Zone defense in American football - Wikipedia

    en.wikipedia.org/wiki/Zone_defense_in_American...

    Cover 4, or quarters, refers to 4 deep defenders each guarding one-fourth of the deep zone. Cover 4 schemes are almost always used to defend against deep passes. [10] (See also Prevent defense). The most basic Cover 4 scheme involves 3 CBs and 2 safeties. Upon snap, the CBs work for depth, backpedaling into their assigned zone.

  5. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    is the number of collisions made (in ideal conditions, perfectly elastic with no friction) by an object of mass m initially at rest between a fixed wall and another object of mass b 2N m, when struck by the other object. [1] (This gives the digits of π in base b up to N digits past the radix point.)

  6. Machin-like formula - Wikipedia

    en.wikipedia.org/wiki/Machin-like_formula

    In the special case where the numerator =, there are exactly four solutions having only two terms. [ 7 ] [ 8 ] All four were found by John Machin in 1705–1706, but only one of them became widely known when it was published in William Jones 's book Synopsis Palmariorum Matheseos , so the other three are often attributed to other mathematicians.

  7. What is Cover 2 defense? Two-high coverages in the NFL ... - AOL

    www.aol.com/cover-2-defense-two-high-201430076.html

    Here's what to know about Cover 2 defense. ... NFL teams are also averaging 2.5 sacks per game so far in 2024 and the league-wide sack rate of 7.7% is the highest figure since 1992. Defenses are ...

  8. Parent–offspring conflict - Wikipedia

    en.wikipedia.org/wiki/Parent–offspring_conflict

    Sisters are more related to each other (0.75) than to their mothers (0.5) or brothers (0.25). In most cases, this drives female workers to try and obtain a sex ratio of 3:1 (females to males) in the colony. However, queens are equally related to both sons and daughters, so they prefer a sex ratio of 1:1.

  9. US asks court to reject TikTok's bid to stave off law that ...

    www.aol.com/news/us-asks-court-reject-delay...

    WASHINGTON (Reuters) -The Justice Department late on Wednesday asked a U.S. appeals court to reject an emergency bid by TikTok to temporarily block a law that would require its Chinese parent ...