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T(1) Theorem: Distribution (Mathematics), Kernel (Integral Operator) -

English
2026-03-15
€156.58 €195.73

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High Quality Content by WIKIPEDIA articles! In mathematics, the T(1) theorem, first proved by David & Journé (1984), describes when an operator T given by a kernel can be extended to a bounded linear operator on the Hilbert space L2(Rn). The name T(1) theorem refers to a condition on the distribution T(1), given by the operator T applied to the function 1. Suppose that T is a continuous operator from Schwar ... Full description

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High Quality Content by WIKIPEDIA articles! In mathematics, the T(1) theorem, first proved by David & Journé (1984), describes when an operator T given by a kernel can be extended to a bounded linear operator on the Hilbert space L2(Rn). The name T(1) theorem refers to a condition on the distribution T(1), given by the operator T applied to the function 1. Suppose that T is a continuous operator from Schwartz functions on Rn to tempered distributions, so that T is given by a kernel K which is a distribution. Assume that the kernel is standard, which means that off the diagonal it is given by a function satisfying certain conditions. Then the T(1) theorem states that T can be extended to a bounded operator on the Hilbert space L2(Rn) if and only if the following conditions are satisfied: * T(1) is of bounded mean oscillation (where T is extended to an operator on bounded smooth functions, such as 1). * T*(1) is of bounded mean oscillation, where T* is the adjoint of T. * T is weakly bounded, a weak condition that is easy to verify in practice.

More Information

Publisher OmniScriptum
Release year 2026
Cover type Softcover
EAN 9786131156915
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€156.58 €195.73