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Date: 4-8-2021
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Date: 29-7-2021
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For , an open subset of , and , the Sobolev space is defined by
(1) |
where , , and the derivatives are taken in a weak sense.
When endowed with the norm
(2) |
is a Banach space.
In the special case , is denoted by . This space is a Hilbert space for the inner product
(3) |
Sobolev spaces play an important role in the theory of partial differential equations.
REFERENCES:
Mazja, V. Sobolev Spaces. New York: Springer-Verlag, 1985.
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