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Resultats globals: 4 registres trobats en 0.02 segons.
Articles, 4 registres trobats
Articles 4 registres trobats  
1.
18 p, 277.1 KB The solution of the Kato problem in two dimensions / Hofmann, Steve (University of Missouri-Columbia. Department of Mathematics) ; McIntosh, Alan (Australian National University. Centre for Mathematics and its Applications)
We solve, in two dimensions, the "square root problem of Kato". That is, for L ≡ − div(A(x)∇), where A(x) is a 2 × 2 accretive matrix of bounded measurable complex coefficients, we prove that L1/2 : L2 1(R2) → L2(R2).
2002 - 10.5565/PUBLMAT_Esco02_06
Publicacions matemàtiques, Vol. Extra (2002) , p. 143-160  
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2.
16 p, 156.7 KB Gaussian estimates for fundamental solutions to certain parabolic systmes / Hofmann, Steve ; Kim, Seick
Auscher proved Gaussian upper bound estimates for the fundamental solutions to parabolic equations with complex coefficients in the case when coefficients are time-independent and a small perturbation of real coefficients. [...]
2004 - 10.5565/PUBLMAT_48204_10
Publicacions matemàtiques, V. 48 N. 2 (2004) , p. 481-496  
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3.
19 p, 196.1 KB Lp bounds for Riesz transforms and square roots associated to second order elliptic operators / Hofmann, Steve ; Martell, José María
We consider the Riesz transforms ∇L−1/2, where L≡− divA(x)∇, and A is an accretive, n × n matrix with bounded measurable complex entries, defined on Rn. We establish boundedness of these operators on Lp(Rn), for the range pn < p ≤ 2, where pn = 2n/(n + 2), n ≥ 2, and we obtain a weak-type estimate at the endpoint pn. [...]
2003 - 10.5565/PUBLMAT_47203_12
Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 497-515  
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4.
69 p, 454.7 KB Carleson measures, trees, extrapolation, and T(b) theorems / Auscher, P. ; Hofmann, Steve ; Muscalu, C. ; Tao, Terence ; Thiele, C.
The theory of Carleson measures, stopping time arguments, and atomic decompositions has been well-established in harmonic analysis. More recent is the theory of phase space analysis from the point of view of wave packets on tiles, tree selection algorithms, and tree size estimates. [...]
2002 - 10.5565/PUBLMAT_46202_01
Publicacions matemàtiques, V. 46 N. 2 (2002) , p. 257-325  
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Vegeu també: autors amb noms similars
4 Hofmann, S.
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