Mary Hogarth beautiful and light-hearted". When Robert Story visited the Hogarth household in 1836, he described Hogarth as "the fairest flower of spring". Dickens showed particular affection to Hogarth, and described her as "a close friend, an exceptional sister, a companion at home." It is believed that Hogarth was the first person to read "The Pickwick Papers" and "Oliver Twist", as Dickens valued Hogarth's input and feedback more than his wife's. In the early hours of 7 May 1837, after Hogarth had returned from a showing of "Is She His Wife?" at the St James's Theatre with the Dickens couple, she collapsed
Arrangement of hyperplanes Arrangement of hyperplanes In geometry and combinatorics, an arrangement of hyperplanes is an arrangement of a finite set "A" of hyperplanes in a linear, affine, or projective space "S". Questions about a hyperplane arrangement "A" generally concern geometrical, topological, or other properties of the complement, "M"("A"), which is the set that remains when the hyperplanes are removed from the whole space. One may ask how these properties are related to the arrangement and its intersection semilattice. The intersection semilattice of "A", written "L"("A"), is the set of all subspaces that are obtained by intersecting some of the hyperplanes; among these