sheaf of groups
51Topological modular forms — In mathematics, the spectrum of topological modular forms (also known as tmf ) describes a generalized cohomology theory whose coefficient ring is similar to the graded ring of holomorphic modular forms with integral cusp expansions. These rings… …
52Scouting in Yorkshire and the Humber — is largely represented by the Scout Association of the United Kingdom and some Groups of traditional Scouting including the Baden Powell Scouts Association. The Scout Association in Yorkshire and the Humber is part of the Scout Association North… …
53mathematics, foundations of — Scientific inquiry into the nature of mathematical theories and the scope of mathematical methods. It began with Euclid s Elements as an inquiry into the logical and philosophical basis of mathematics in essence, whether the axioms of any system… …
54Christmas worldwide — Christmas around the world redirects here. For other uses, see Christmas Around the World (Bradley Joseph album). The Christmas season is celebrated in different ways around the world, varying by country and region. Elements common to many areas… …
55Corn dolly — Corn dollies or corn mothers are a form of straw work made as part of harvest customs of Europe before mechanization. Before Christianisation, in traditional pagan European culture it was believed that the spirit of the corn (in modern American,… …
56Direct image functor — In mathematics, in the field of sheaf theory and especially in algebraic geometry, the direct image functor generalizes the notion of a section of a sheaf to the relative case. Contents 1 Definition 1.1 Example 1.2 Variants …
57Serre duality — In algebraic geometry, a branch of mathematics, Serre duality is a duality present on non singular projective algebraic varieties V of dimension n (and in greater generality for vector bundles and further, for coherent sheaves). It shows that a… …
58Čech cohomology — In mathematics, specifically algebraic topology, Čech cohomology is a cohomology theory based on the intersection properties of open covers of a topological space. It is named for the mathematician Eduard Čech. Contents 1 Motivation 2… …
59Enriques–Kodaira classification — In mathematics, the Enriques–Kodaira classification is a classification of compact complex surfaces into ten classes. For each of these classes, the surfaces in the class can be parametrized by a moduli space. For most of the classes the moduli… …
60Künneth theorem — In mathematics, especially in homological algebra and algebraic topology, a Künneth theorem is a statement relating the homology of two objects to the homology of their product. The classical statement of the Künneth theorem relates the singular… …
