While the course of reasoning in the preceding chapters led us “from the particular to the general”—from a directed line segment, for example, to an abstract space element—at this stage we choose to change our approach and concentrate on the particular class of abstract spaces known as function spaces. A function space is an abstract space, the elements of which are functions or sets of functions defined in an appropriate domain.
KeywordsHilbert Space Quantum Mechanic Function Space Function Vector Elastic Strain Energy
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