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"Flags"
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Flags of the world
Pictures and descriptions of the flags of all the nations of the world, along with brief information about each country.
Book
Flag-Transitive 2-v,5,λ Designs Admitting a Two-Dimensional Projective Group
The focus of this study is to classify flag-transitive 2-designs. We have come to the conclusion that if D is a nontrivial 2-design having block size 5 and G is a two-dimensional projective special linear group which acts flag-transitively on D with q≢1 (mod 4), then D is a 2-(11, 5, 2) design, a 2-(11, 5, 12) design, a 2-q+1,5,2q−1 design with q≡3 (mod 4) or a 2-q+1,5,q−1/3 design with q=2f (where f>2 is an even).
Journal Article
The flag we love
An introduction to the American flag relates its history and explains the ideals it represents.
Book
Red, white, and blue : the story of the American flag
Describes how the American flag came into being, how it has changed over the years, and its importance as the symbol of our country.
Book
Affine flag varieties and quantum symmetric pairs
The quantum groups of finite and affine type A admit geometric realizations in terms of partial flag varieties of finite and affine type A. Recently, the quantum group associated to partial flag varieties of finite type B/C is shown to be a coideal subalgebra of the quantum group of finite type A. In this paper the authors study the structures of Schur algebras and Lusztig algebras associated to (four variants of) partial flag varieties of affine type C. The authors show that the quantum groups arising from Lusztig algebras and Schur algebras via stabilization procedures are (idempotented) coideal subalgebras of quantum groups of affine \\mathfrak{sl} and \\mathfrak{gl} types, respectively. In this way, the authors provide geometric realizations of eight quantum symmetric pairs of affine types. The authors construct monomial and canonical bases of all these quantum (Schur, Lusztig, and coideal) algebras. For the idempotented coideal algebras of affine \\mathfrak{sl} type, the authors establish the positivity properties of the canonical basis with respect to multiplication, comultiplication and a bilinear pairing. In particular, the authors obtain a new and geometric construction of the idempotented quantum affine \\mathfrak{gl} and its canonical basis.
eBook
F is for flag
Celebrates the origin, symbolism, and power of the banner that represents the United States of America.
Book
Trump calls London protests against his trip 'fake news'
While large crowds were protesting his visit to London, President Trump dismissed the demonstrations as \"fake news\" at a June 4 press conference with the British prime minister.
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