In mathematics, especially in the field of category theory, the concept of injective object is a generalization of the concept of injective module. This concept is important in homotopy theory and in theory of model categories. The dual notion is that of a projective object.
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“Life at its noblest leaves mere happiness far behind; and indeed cannnot endure it.... Happiness is not the object of life: life has no object: it is an end in itself; and courage consists in the readiness to sacrifice happiness for an intenser quality of life.”
—George Bernard Shaw (18561950)
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