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In philosophy and the arts, a fundamental distinction exists between abstract and concrete entities. While there is no universally accepted definition, common examples illustrate the difference: numbers, sets, and ideas are typically classified as abstract objects, whereas plants, dogs, and planets are considered concrete objects.
Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water, [1] and is the most widely used building material. [2] Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. [3]
According to the preface, the topics in Concrete Mathematics are "a blend of CONtinuous and disCRETE mathematics". Calculus is frequently used in the explanations and exercises. The term "concrete mathematics" also denotes a complement to "abstract mathematics". The book is based on a course begun in 1970 by Knuth at Stanford University.
A concrete communication uses specific facts and figures. [1] Concreteness is often taught in college communication courses as one of the aspects of effective communication. [2] Counselors, attorneys, job interviewers, etc. often prod their interviewees to speak with greater concreteness.
Construal level theory (CLT) is a theory in social psychology that describes the relation between psychological distance and the extent to which people's thinking (e.g., about objects and events) is abstract or concrete.
Concrete poetry is an arrangement of linguistic elements in which the typographical effect is more important in conveying meaning than verbal significance. [1] It is sometimes referred to as visual poetry , a term that has now developed a distinct meaning of its own.
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In mathematics, a concrete category is a category that is equipped with a faithful functor to the category of sets (or sometimes to another category). This functor makes it possible to think of the objects of the category as sets with additional structure , and of its morphisms as structure-preserving functions.