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The eighty-fifth cabinet of Bulgaria, also known as the Videnov cabinet or Videnov Government, was a coalition government in Bulgaria, led by the Bulgarian...

In physics, the differential coefficient of a function f(x) is what is now called its derivative df(x)/dx, the (not necessarily constant) multiplicative...

In category theory, a branch of mathematics, a subfunctor is a special type of functor that is an analogue of a subset. Let C be a category, and let F...

Platonic solids - regular polyhedra (all faces of the same type) Archimedean solids - polyhedra with more than one polygon face type. Catalan solids -...