This is a preliminary announcement of the conference on
PERSPECTIVES IN HIGH DIMENSIONS
to be held on the campus of Case Western Reserve University in
Cleveland, Ohio, U.S.A. from August 1 until August 7, 2010.
The aim of the conference is to reflect on recent and future
developments in broadly understood geometric functional analysis,
with emphasis on interactions with other subfields of mathematics and
with other mathematical sciences.
The conference will be supported by the NSF via Focused Research
Grant which involves CWRU, Kent State University, University of
Michigan and University of Missouri (see
http://www.math.lsa.umich.edu/research/gfa/index.html).
More details will be provided in the coming months; at this point we
would like to inform potential participants so that they can "save
the date." Should you have any questions, please contact one of the
organizers listed below. The temporary conference website is at
http://www.cwru.edu/artsci/math/szarek/perspectives/
Alexander Koldobsky <koldobskiya(a)missouri.edu>
Mark Rudelson <RudelsonM(a)missouri.edu>
Dmitry Ryabogin <ryabogin(a)math.kent.edu>
Stanislaw Szarek <szarek(a)cwru.edu>
Roman Vershynin <romanv(a)umich.edu>
Elisabeth Werner <elisabeth.werner(a)case.edu>
Artem Zvavitch <zvavitch(a)math.kent.edu>
This is an announcement for the paper "The Kolmogorov-Riesz compactness
theorem" by Harald Hanche-Olsen and Helge Holden.
Abstract: We show that the Arzela-Ascoli theorem and Kolmogorov
compactness theorem both are consequences of a simple lemma on compactness
in metric spaces. Their relation to Helly's theorem is discussed. The
paper contains a detailed discussion on the historical background of
the Kolmogorov compactness theorem.
Archive classification: math.CA math.FA
Mathematics Subject Classification: 46E30, 46E35; 46N20
The source file(s), kolmogorov.tex: 36412 bytes, is(are) stored in gzipped
form as 0906.4883.gz with size 12kb. The corresponding postcript file
has gzipped size 213kb.
Submitted from: holden(a)math.ntnu.no
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.4883
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http://arXiv.org/abs/0906.4883
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This is an announcement for the paper "Atomic decomposition and
interpolation for Hardy spaces of noncommutative martingales" by
Turdebek N. Bekjan, Zeqian Chen, Mathilde Perrin and Zhi Yin.
Abstract: We prove that atomic decomposition for the Hardy spaces h_1 and
H_1 is valid for noncommutative martingales. We also establish that the
conditioned Hardy spaces of noncommutative martingales h_p and bmo form
interpolation scales with respect to both complex and real interpolations.
Archive classification: math.OA math.FA
Mathematics Subject Classification: 46L53, 46L52
The source file(s), ncatom_interp.tex: 58773 bytes, is(are) stored in
gzipped form as 0906.4437.gz with size 16kb. The corresponding postcript
file has gzipped size 115kb.
Submitted from: mathilde.perrin(a)univ-fcomte.fr
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.4437
or
http://arXiv.org/abs/0906.4437
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This is an announcement for the paper "A noncommutative Davis'
decomposition for martingales" by Mathilde Perrin.
Abstract: We prove an analogue of the classical Davis' decomposition
for martingales in noncommutative L_p-spaces, involving the square
functions. We also determine the dual space of the noncommutative
conditioned Hardy space \h_1. We further extend this latter result to
the case 1<p<2.
Archive classification: math.OA math.FA
Mathematics Subject Classification: 46L53, 46L52 (Primary) 46L51, 60G42
(Secondary)
Remarks: To be published in Journal of London Math. Soc
The source file(s), Nc_davis2.tex: 58260 bytes, is(are) stored in gzipped
form as 0906.4434.gz with size 15kb. The corresponding postcript file
has gzipped size 118kb.
Submitted from: mathilde.perrin(a)univ-fcomte.fr
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.4434
or
http://arXiv.org/abs/0906.4434
or by email in unzipped form by transmitting an empty message with
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This is an announcement for the paper "A Banach-Stone theorem for
Riesz isomorphisms of Banach lattices" by Jin Xi Chen, Zi Li Chen,
and Ngai-Ching Wong.
Abstract: Let $X$ and $Y$ be compact Hausdorff spaces, and $E$, $F$ be
Banach lattices. Let $C(X,E)$ denote the Banach lattice of all continuous
$E$-valued functions on $X$ equipped with the pointwise ordering
and the sup norm. We prove that if there exists a Riesz isomorphism
$\mathnormal{\Phi}: C(X,E)\to C(Y,F)$ such that $\mathnormal{\Phi}f$ is
non-vanishing on $Y$ if and only if $f$ is non-vanishing on $X$, then $X$
is homeomorphic to $Y$, and $E$ is Riesz isomorphic to $F$. In this case,
$\mathnormal{\Phi}$ can be written as a weighted composition operator:
$\mathnormal{\Phi} f(y)=\mathnormal{\Pi}(y)(f(\varphi(y)))$, where
$\varphi$ is a homeomorphism from $Y$ onto $X$, and $\mathnormal{\Pi}(y)$
is a Riesz isomorphism from $E$ onto $F$ for every $y$ in $Y$. This
generalizes some known results obtained recently.
Archive classification: math.FA
Mathematics Subject Classification: 46B42, 47B65
The source file(s),
Chen_Chen_Wong_Banach-Stone_theorem_for_Riesz_isomorphisms.tex: 24807
bytes, is(are) stored in gzipped form as 0906.4196.gz with size 8kb. The
corresponding postcript file has gzipped size 71kb.
Submitted from: jinxichen(a)home.swjtu.edu.cn
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.4196
or
http://arXiv.org/abs/0906.4196
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This is an announcement for the paper "Embeddings of proper metric spaces
into Banach spaces" by Baudier Florent.
Abstract: We show that there exists a strong uniform embedding from
any proper metric space into any Banach space without cotype. Then we
prove a result concerning the Lipschitz embedding of locally finite
subsets of $\mathcal{L}_{p}$-spaces. We use this locally finite result
to construct a coarse bi-Lipschitz embedding for proper subsets of
any $\mathcal{L}_p$-space into any Banach space $X$ containing the
$\ell_p^n$'s. Finally using an argument of G. Schechtman we prove that
for general proper metric spaces and for Banach spaces without cotype
a converse statement holds.
Archive classification: math.FA math.MG
Mathematics Subject Classification: 46B20; 51F99
Remarks: 16 pages
The source file(s), proper.tex: 34599 bytes, is(are) stored in gzipped
form as 0906.3696.gz with size 10kb. The corresponding postcript file
has gzipped size 91kb.
Submitted from: florent.baudier(a)univ-fcomte.fr
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.3696
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http://arXiv.org/abs/0906.3696
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This is an announcement for the paper "Unconditionality in tensor
products and ideals of polynomials, multilinear forms and operators"
by Daniel Carando and Daniel Galicer.
Abstract: We study tensor norms that destroy unconditionality in the
following sense: for every Banach space $E$ with unconditional basis, the
$n$-fold tensor product of $E$ (with the corresponding tensor norms) does
not have unconditional basis. We show that this holds for all injective
and projective tensor norms different from $\varepsilon$ and $\pi$,
both in the full and symmetric tensor products. In particular, every
nontrivial natural symmetric tensor norms destroys unconditionality. We
prove that there are exactly 6 natural symmetric tensor norms for $n\ge
3$, a noteworthy difference with the 2-fold case. We present applications
to polynomial ideals: we show that many polynomial ideals never have the
Gordon-Lewis property or, in the spirit of a result of Defant and Kalton,
can have the Gordon-Lewis property but never have unconditional basis. We
also consider unconditionality in multilinear and operator ideals.
Archive classification: math.FA
Mathematics Subject Classification: 46M05; 46G25; 47L20
Remarks: 27 pages
The source file(s), Carando-GalicerArxiv.tex: 100018 bytes, is(are)
stored in gzipped form as 0906.3253.gz with size 26kb. The corresponding
postcript file has gzipped size 163kb.
Submitted from: dgalicer(a)dm.uba.ar
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.3253
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http://arXiv.org/abs/0906.3253
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This is an announcement for the paper "Smooth extensions of functions
on separable Banach spaces" by D. Azagra, R. Fry, and L. Keener.
Abstract: Let $X$ be a Banach space with a separable dual $X^{*}$. Let
$Y\subset X$ be a closed subspace, and $f:Y\to\mathbb{R}$ a $C^{1}$-smooth
function. Then we show there is a $C^{1}$ extension of $f$ to $X$.
Archive classification: math.FA
Mathematics Subject Classification: 46B20
Remarks: 14 pages
The source file(s), AFKJune14.tex: 44778 bytes, is(are) stored in gzipped
form as 0906.2989.gz with size 14kb. The corresponding postcript file
has gzipped size 97kb.
Submitted from: dazagra(a)gmail.com
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.2989
or
http://arXiv.org/abs/0906.2989
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This is an announcement for the paper "Majorization in de Branges spaces
II. Banach spaces generated by majorants" by Anton Baranov and Harald
Woracek.
Abstract: This is the second part in a series dealing with subspaces
of de~Branges spaces of entire function generated by majorization on
subsets of the closed upper half-plane. In this part we investigate
certain Banach spaces generated by admissible majorants. We study
their interplay with the original de Branges space structure, and their
geometry. In particular, we will show that, generically, they will be
nonreflexive and nonseparable.
Archive classification: math.CV math.FA
Mathematics Subject Classification: 46E15, 46B26, 46E22
The source file(s), sprm5.tex: 84171 bytes, is(are) stored in gzipped
form as 0906.2943.gz with size 23kb. The corresponding postcript file
has gzipped size 145kb.
Submitted from: antonbaranov(a)netscape.net
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.2943
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http://arXiv.org/abs/0906.2943
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This is an announcement for the paper "Counterexamples for interpolation
of compact Lipschitz operators" by Michael Cwikel and Alon Ivtsan.
Abstract: Let (A_0,A_1) and (B_0,B_1) be Banach couples with A_0 contained
in A_1 and B_0 contained in B_1. Let T:A_1 --> B_1 be a possibly nonlinear
operator which is a compact Lipschitz map of A_j into B_j for j=0,1. It is
known that T maps the Lions-Peetre space (A_0,A_1)_\theta,q boundedly into
(B_0,B_1)_\theta,q for each \theta in (0,1) and each q in [1,\infty), and
that this map is also compact if if T is linear. We present examples which
show that in general the map T:(A_0,A_1)_\theta,q --> (B_0,B_1)_\theta,q
is not compact.
Archive classification: math.FA
Mathematics Subject Classification: 46B70 (primary), 47H99, 46B50
(secondary)
Remarks: 22 pages. The main results are on pages 1-8. Later pages contain
some additional more elaborate counterexamples
The source file(s), 14cCounterexample.tex: 76306 bytes e1e2yellow.jpg:
50818 bytes enen+1yellowgreen.jpg: 102039 bytes etnew.jpg: 65214
bytes newen-yellow.jpg: 56125 bytes, is(are) stored in gzipped form as
0906.2432.tar.gz with size 250kb. The corresponding postcript file has
gzipped size .
Submitted from: mcwikel(a)math.technion.ac.il
The paper may be downloaded from the archive by web browser from URL
http://front.math.ucdavis.edu/0906.2432
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http://arXiv.org/abs/0906.2432
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