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By Dieudonne J.

This quantity, the 8th out of 9, keeps the interpretation of "Treatise on research" via the French writer and mathematician, Jean Dieudonne. the writer indicates how, for a voluntary constrained category of linear partial differential equations, using Lax/Maslov operators and pseudodifferential operators, mixed with the spectral concept of operators in Hilbert areas, results in options which are even more specific than options arrived at via "a priori" inequalities, that are dead purposes.

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X Therefore, the integrals of ϕ with respect to the measures ( U f n , h) H converge. Moreover, the limit is the integral of ϕ with respect to ( U f, h) H , which follows by the one-dimensional case applied to the conditional measures. This completes the proof in the case of S BV and bounded { f n }. In the case of BV it is necessary to show that U f has bounded variation. The measures f n possess H -valued vector densities Rn with respect to some common nonnegative measure ν and the sequence of functions |Rn | H is bounded in L 1 (ν).

An equivalent description of functions in S BVH (U, μ) can be given in the form of integration by parts if in place of the class FC ∞ we use appropriate classes of test functions for every h ∈ H . For any Vxed vector h ∈ H we choose a closed hyperplane Y complementing Rh and consider the class Dh of all bounded functions ϕ on X with the following properties: ϕ is measurable with respect to all Borel measures, for each y ∈ Y the function t → ϕ(y + th) is inVnitely differentiable and has compact support in the interval Jy,h = {t : y + th ∈ U }, and the functions ∂hn ϕ are bounded for all n ≥ 1.

For a constant vector Veld v = h ∈ H we have δv = h. For vector Velds v on R∞ of the simplest form v(x) = u(x1 , . . , xn )ek the divergence is also easily evaluated: δv(x) = (D H u(x1 , . . , xn ), ek ) H + u(x1 , . . , xn )xk . Similarly, in a slightly more general case of the Veld v = u1h1 + · · · + un hn , we have u i ∈ W p,1 (γ ), h i ∈ H, n (D H u i , h i ) H + u i h i . δv = i=1 The previous theorem says essentially that the L p -norm of this function can be controlled through the Sobolev norm of v; this is quite easy for p = 2, but requires some work in the general case.

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