Quotes About Morphism

If P is a presheaf on C and x E P(C), the value for an arrow f : D -* C in C is called the restriction of x along f, and is often denoted by I or by a dot:

Through the application of morphisms, objects are said to be enformed: "the active imposition of a form on an object by the knowing subject. In a derived sense, the same word designates…the fact that some knowledge content is subsumed under a well-defined form" (Piaget et al., 1990/1992, p.