LiliChen,YunanCui,andYanfengZhaoΒ Β· Research Article Complex Convexity of Musielak-Orlicz Function...
Transcript of LiliChen,YunanCui,andYanfengZhaoΒ Β· Research Article Complex Convexity of Musielak-Orlicz Function...
-
Research ArticleComplex Convexity of Musielak-Orlicz Function SpacesEquipped with the π-Amemiya Norm
Lili Chen, Yunan Cui, and Yanfeng Zhao
Department of Mathematics, Harbin University of Science and Technology, Harbin 150080, China
Correspondence should be addressed to Lili Chen; [email protected]
Received 27 November 2013; Revised 5 April 2014; Accepted 13 April 2014; Published 8 May 2014
Academic Editor: Angelo Favini
Copyright Β© 2014 Lili Chen et al.This is an open access article distributed under the Creative CommonsAttribution License, whichpermits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The complex convexity of Musielak-Orlicz function spaces equipped with the π-Amemiya norm is mainly discussed. It is obtainedthat, for any Musielak-Orlicz function space equipped with the π-Amemiya norm when 1 β€ π < β, complex strongly extremepoints of the unit ball coincide with complex extreme points of the unit ball. Moreover, criteria for them in above spaces are given.Criteria for complex strict convexity and complex midpoint locally uniform convexity of above spaces are also deduced.
1. Introduction
Let (π, β β β) be a complex Banach space over the complexfield C, let π be the complex number satisfying π2 = β1, andlet π΅(π) and π(π) be the closed unit ball and the unit sphereof π, respectively. In the sequel, N and R denote the set ofnatural numbers and the set of real numbers, respectively.
In the early 1980s, a huge number of papers in the area ofthe geometry of Banach spaces were directed to the complexgeometry of complex Banach spaces. It is well known that thecomplex geometric properties of complex Banach spaces haveapplications in various branches, among others in HarmonicAnalysis Theory, Operator Theory, Banach Algebras, πΆβ-Algebras, Differential EquationTheory, QuantumMechanicsTheory, and Hydrodynamics Theory. It is also known thatextreme points which are connected with strict convexity ofthe whole spaces are the most basic and important geometricpoints in geometric theory of Banach spaces (see [1β6]).
In [7], Thorp and Whitley first introduced the conceptsof complex extreme point and complex strict convexitywhen they studied the conditions under which the StrongMaximum Modulus Theorem for analytic functions alwaysholds in a complex Banach space.
A point π₯ β π(π) is said to be a complex extreme point ofπ΅(π) if for every nonzeroπ¦ β π there holds sup
|π|β€1βπ₯+ππ¦β >
1. A complex Banach space π is said to be complex strictlyconvex if every element of π(π) is a complex extreme pointof π΅(π).
In [8], we further studied the notions of complex stronglyextreme point and complex midpoint locally uniform con-vexity in general complex spaces.
A point π₯ β π(π) is said to be a complex strongly extremepoint of π΅(π) if for every π > 0 we have Ξ
π(π₯, π) > 0, where
Ξπ(π₯, π) = inf {1 β |π| : βπ¦ β πs.t. ππ₯ Β± π¦
β€ 1,
ππ₯ Β± ππ¦ β€ 1,
π¦ β₯ π} .
(1)
A complex Banach space π is said to be complex midpointlocally uniformly convex if every element of π(π) is a complexstrongly extreme point of π΅(π).
Let (π, Ξ£, π) be a nonatomic and complete measure spacewith π(π) < β. By Ξ¦ we denote a Musielak-Orlicz function;that is, Ξ¦ : π Γ [0, +β) β [0, +β] satisfies the following:
(1) for each π’ β [0,β], Ξ¦(π‘, π’) is a π-measurablefunction of π‘ on π;
(2) for π-a.e. π‘ β π,Ξ¦(π‘, 0) = 0, limπ’ββ
Ξ¦(π‘, π’) = β andthere exists π’ > 0 such thatΞ¦(π‘, π’) < β;
(3) for π-a.e. π‘ β π, Ξ¦(π‘, π’) is convex on the interval[0,β) with respect to π’.
Let πΏπ(π) be the space of all π-equivalence classes ofcomplex and Ξ£-measurable functions defined on π. For eachπ₯ β πΏπ(π), we define on πΏπ(π) the convex modular of π₯ by
πΌΞ¦(π₯) = β«
π
Ξ¦ (π‘, |π₯ (π‘)|) ππ‘. (2)
Hindawi Publishing CorporationAbstract and Applied AnalysisVolume 2014, Article ID 190203, 6 pageshttp://dx.doi.org/10.1155/2014/190203
-
2 Abstract and Applied Analysis
We define supp π₯ = {π‘ β π : |π₯(π‘)| ΜΈ= 0} and the Musielak-Orlicz space πΏ
Ξ¦generated by the formula
πΏΞ¦= {π₯ β πΏ
π(π) : πΌ
Ξ¦(ππ₯) < β for some π > 0} . (3)
Set
π (π‘) = sup {π’ β₯ 0 : Ξ¦ (π‘, π’) = 0} ,
πΈ (π‘) = sup {π’ β₯ 0 : Ξ¦ (π‘, π’) < β} ;(4)
then π(π‘) and πΈ(π‘) are π-measurable (see [9]).The notion of π-Amemiya norm has been introduced in
[10]; for any 1 β€ π β€ β and π’ > 0, define
π π(π’) = {
(1 + π’π)1/π
, for 1 β€ π < β,max {1, π’} , for π = β.
(5)
Furthermore, define π Ξ¦,π(π₯) = π
πβπΌΞ¦(π₯) for all 1 β€ π β€ β
and π₯ β πΏπ(π). Notice that the function π πis increasing on π
+
for 1 β€ π < β; however, the function π βis increasing on the
interval [1,β) only.For π₯ β πΏπ(π), define the π-Amemiya norm by the
formula
βπ₯βΞ¦,π = infπ>0
1
ππ Ξ¦,π(ππ₯) , 1 β€ π β€ β. (6)
For convenience, from now on, we write πΏΞ¦,π
=
(πΏΞ¦, β β βΞ¦,π); it is easy to see that πΏ
Ξ¦,πis a Banach space. For
1 β€ π < β, π₯ β πΏΞ¦,π
, set
πΎπ(π₯) = {π > 0 : βπ₯βΞ¦,π =
1
π{1 + πΌ
π
Ξ¦(ππ₯)}1/π
} . (7)
2. Main Results
We begin this section from the following useful lemmas.
Lemma 1 (see [9]). For any π > 0, there exists πΏ β (0, 1/2)such that if π’, V β C and
|V| β₯π
8maxπ|π’ + πV| , (8)
then
|π’| β€1 β 2πΏ
4Ξ£π |π’ + πV| , (9)
where
maxπ|π’ + πV| = max {|π’ + V| , |π’ β V| , |π’ + πV| , |π’ β πV|} ,
Ξ£π |π’ + πV| = |π’ + V| + |π’ β V| + |π’ + πV| + |π’ β πV| .
(10)
Lemma 2. If limπ’ββ
(Ξ¦(π‘, π’)/π’) = β for π-a.e. π‘ β π, thenπΎπ(π₯) ΜΈ= 0 for any π₯ β πΏ
Ξ¦,π\ {0}, where 1 β€ π < β.
Proof. For any π₯ β πΏΞ¦,π
\ {0}, there exists πΌ > 0 such thatπ{π‘ β π : |π₯(π‘)| β₯ πΌ} > 0. Let π
1= {π‘ β π : |π₯(π‘)| β₯ πΌ} and
define the subsets
πΉπ= {π‘ β π
1:Ξ¦ (π‘, π’)
π’β₯4βπ₯βΞ¦,π
πΌ β ππ1
, π’ β₯ π} (11)
for each π β N. It is easy to see that πΉ1β F2β β β β β πΉ
πβ β β β
and limπββ
ππΉπ= ππ1. Then there exists π
0β N such that
ππΉπ0> (1/2)ππ
1.
It follows from the definition of π-Amemiya norm thatthere is a sequence {π
π} satisfying
βπ₯βΞ¦,π = limπββ
1
ππ
{1 + πΌπ
Ξ¦(πππ₯)}1/π
. (12)
For any π > 0, we have
1
π{1 + πΌ
π
Ξ¦(ππ₯)}1/π
=1
π{1 + [β«
π
Ξ¦ (π‘, π |π₯ (π‘)|) ππ‘]
π
}
1/π
β₯
β«πΉπ0
Ξ¦ (π‘, π |π₯ (π‘)|) ππ‘
π
β₯ β«πΉπ0
Ξ¦ (π‘, ππΌ)
πππ‘
= πΌβ«πΉπ0
Ξ¦ (π‘, ππΌ)
ππΌππ‘.
(13)
If π > π0/πΌ, notice that
1
π{1 + πΌ
π
Ξ¦(ππ₯)}1/π
β₯ πΌ β 4βπ₯βΞ¦,π
πΌ β ππ1
β ππΉπ0> 2βπ₯βΞ¦,π, (14)
which means the sequence {ππ} is bounded. Hence, without
loss of generality, we assume that ππβ π0as π β β.
We can also choose the monotonic increasing or decreasingsubsequence of {π
π} that converges to the number π
0. Apply-
ing Levi Theorem and Lebesgue Dominated ConvergenceTheorem, we obtain
βπ₯βΞ¦,π = limπββ
1
ππ
{1 + πΌπ
Ξ¦(πππ₯)}1/π
=1
π0
{1 + πΌπ
Ξ¦(π0π₯)}1/π
(15)
which implies π0β πΎπ(π₯).
In order to exclude the case when such sets πΎπ(π₯) are
empty for π₯ β πΏΞ¦,π\{0}, in the sequel we will assume, without
any special mention, that limπ’ββ
(Ξ¦(π‘, π’)/π’) = β for π-a.e.π‘ β π.
Theorem 3. Assume 1 β€ π < β, π₯ β π(πΏΞ¦,π). Then the
following assertions are equivalent:
(1) π₯ is a complex strongly extreme point of the unit ballπ΅(πΏΞ¦,π);
(2) π₯ is a complex extreme point of the unit ball π΅(πΏΞ¦,π);
(3) for any π β πΎπ(π₯), π{π‘ β π : π|π₯(π‘)| < π(π‘)} = 0.
Proof. The implication (1) β (2) is trivial. Let π₯ be a complexextreme point of the unit ball π΅(πΏ
Ξ¦,π) and there exists π
0β
πΎπ(π₯) such that π{π‘ β π : π
0|π₯(π‘)| < π(π‘)} > 0. Then we can
-
Abstract and Applied Analysis 3
find π > 0 such that π{π‘ β π : π0|π₯(π‘)| + π < π(π‘)} > 0.
Indeed, if π{π‘ β π : π0|π₯(π‘)| + π < π(π‘)} = 0 for any π > 0,
then we set ππ= 1/π and define the subsets
ππ= {π‘ β π : π
0 |π₯ (π‘)| + ππ < π (π‘)} (16)
for each π β N. Notice that π1β π2β β β β β π
πβ β β β and
{π‘ β π : π0|π₯(π‘)| β€ π(π‘)} = β
β
π=1ππ; we can find that
π {π‘ β π : π0 |π₯ (π‘)| β€ π (π‘)} = 0 (17)
which is a contradiction.Let π0= {π‘ β π : π
0|π₯(π‘)| + π < π(π‘)} and define π¦ =
(π/π0)ππ0; we have π¦ ΜΈ= 0 and for any π β C with |π| β€ 1,
π₯ + ππ¦Ξ¦,π β€
1
π0
{1 + πΌπ
Ξ¦(π0(π₯ + ππ¦))}
1/π
=1
π0
{1 + [πΌΞ¦(π0π₯ππ\π0
)
+πΌΞ¦(π0π₯ππ0+ πππ
π0)]π
}1/π
β€1
π0
{1 + [πΌΞ¦(π0π₯ππ\π0
)
+πΌΞ¦((π0 |π₯| + π) ππ0
)]π
}1/π
=1
π0
{1 + [πΌΞ¦(π0π₯ππ\π0
)]π
}1/π
=1
π0
(1 + πΌπ
Ξ¦(π0π₯))1/π
= 1,
(18)
which shows that π₯ is not a complex extreme point of the unitball π΅(πΏ
Ξ¦,π).
(3) β (1). Suppose that π₯ β π(πΏΞ¦,π) is not a complex
strongly extreme point of the unit ball π΅(πΏΞ¦,π),; then there
exists π0> 0 such thatΞ
π(π₯, π0) = 0.That is, there existπ
πβ C
with |ππ| β 1 andπ¦
πβ πΏΞ¦,π
satisfying βπ¦πβΞ¦,π
β₯ π0such that
πππ₯0 Β± π¦πΞ¦,π β€ 1,
πππ₯0 Β± ππ¦πΞ¦,π β€ 1, (19)
which givesπ₯0Β±π¦π
ππ
Ξ¦,π
β€1ππ
,
π₯0Β± ππ¦π
ππ
Ξ¦,π
β€1ππ
. (20)
Setting π§π= π¦π/ππ, we haveπ§πΞ¦,π β₯
π¦πΞ¦,π β₯ π0,
π₯0 Β± π§πΞ¦,π β€
1ππ
,
π₯0 Β± ππ§πΞ¦,π β€
1ππ
.
(21)
For the above π0> 0, by Lemma 1, there exists πΏ
0β
(0, 1/2) such that if π’, V β C and
|V| β₯π0
8maxπ|π’ + πV| , (22)
then
|π’| β€1 β 2πΏ
0
4Ξ£π |π’ + πV| . (23)
For each π β N, let
π΄π= {π‘ β π :
π§π (π‘) β₯
π0
8maxπ
π₯0 (π‘) + ππ§π (π‘)} ,
π§(1)
π: π§(1)
π(π‘) = π§
π(π‘) (π‘ β π΄
π) , π§
(1)
π(π‘) = 0 (π‘ β π΄
π) ,
π§(2)
π: π§(2)
π(π‘) = 0 (π‘ β π΄
π) , π§
(2)
π(π‘) = π§
π(π‘) (π‘ β π΄
π) .
(24)
It is easy to see that π§π= π§(1)
π+π§(2)
π,βπ β N. Since |π
π| β 1
when π β β, the following inequalities
π§(1)
π
Ξ¦,π
= infπ>0
1
π{1 + [β«
π‘βπ΄π
Ξ¦(π‘, ππ§π (π‘)
) ππ‘]
π
}
1/π
β€ infπ>0
1
π{1+
[β«π‘βπ΄π
Ξ¦(π‘, ππ0
8maxπ
π₯0 (π‘) + ππ§π (π‘)) ππ‘]
π
}
1/π
β€π0
8
maxπ
π₯0 + ππ§π
Ξ¦,π
β€π0
8
Ξ£ππ₯0 + ππ§π
Ξ¦,π
β€π0
2ππ
<3π0
4
(25)
hold for π large enough.Therefore, βπ§(2)
πβΞ¦,π
> π0/4 which shows that π(π΄
π) > 0
for π large enough. Furthermore, for any π‘ β π΄π, we have
π₯0 (π‘) β€
1 β 2πΏ0
4Ξ£π
π₯0 (π‘) + ππ§π (π‘) .
(26)
To complete the proof, we consider the following twocases.
(I) One has ππβ β(π β β), where π
πβ πΎπ((1/4)
Ξ£π|π₯0+ ππ§π|).
-
4 Abstract and Applied Analysis
For each π β N, we get
1 =π₯0
Ξ¦,π
β€1
ππ
{1 + πΌπ
Ξ¦(πππ₯0)}1/π
=1
ππ
{1 + [β«π‘βπ΄π
Ξ¦(π‘, ππ
π₯0 (π‘)) ππ‘
+β«π‘βπ΄π
Ξ¦(π‘, ππ
π₯0 (π‘)) ππ‘]
π
}
1/π
β€1
ππ
{1 + [β«π‘βπ΄π
Ξ¦(π‘, ππ(1 β 2πΏ
0
4
ΓΞ£π
π₯0 (π‘) + ππ§π (π‘) )) ππ‘
+ β«π‘βπ΄π
Ξ¦(π‘, ππ
Γ (1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘]
π
}
1/π
β€1
ππ
{1
+ [ (1 β 2πΏ0)
Γ β«π‘βπ΄π
Ξ¦(π‘, ππ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘
+ β«π‘βπ΄π
Ξ¦(π‘, ππ
Γ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘]
π
}
1/π
=1
ππ
{1
+ [πΌΞ¦(ππ(1
4Ξ£π
π₯0 + ππ§π)) β 2πΏ0
Γ β«π‘βπ΄π
Ξ¦(π‘, ππ
Γ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘]
π
}
1/π
.
(27)
Furthermore, we notice that
β«π‘βπ΄π
Ξ¦(π‘, ππ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘
β₯ β«π‘βπ΄π
Ξ¦(π‘, ππ
π§π (π‘)) ππ‘
β₯ [ππ
π
π§(2)
π
π
Ξ¦,πβ 1]1/π
β₯ [(π0
4ππ)
π
β 1]
1/π
.
(28)
Since ππβ βwhen π β β, we can see that the inequality
((π0/4)ππ)πβ 1 > 0 holds for π large enough. Moreover, we
find that
πΌΞ¦(ππ(1
4Ξ£π
π₯0 + ππ§π))
β₯ πΌΞ¦(πππ₯0)
β₯ (ππ
πβ 1)1/π
β₯ 2πΏ0((π0
4ππ)
π
β 1)
1/π
.
(29)
Then we deduce
1 =π₯0
Ξ¦,π
β€1
ππ
{1 + [πΌΞ¦(ππ(1
4Ξ£π
π₯0 + ππ§π)) β 2πΏ0
Γ β«π‘βπ΄π
Ξ¦(π‘, ππ
Γ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘]
π
}
1/π
β€1
ππ
{1 + [πΌΞ¦(ππ(1
4Ξ£π
π₯0 + ππ§π))
β2πΏ0((π0
4ππ)
π
β 1)
1/π
]
π
}
1/π
<1
ππ
{1 + πΌπ
Ξ¦(ππ(1
4Ξ£π
π₯0 + ππ§π))}
1/π
= 1,
(30)
a contradiction.(II) One has π
πβ π
0(π β β), where π
πβ
πΎπ((1/4)Ξ£
π|π₯0+ ππ§π|), π0β R.
Then for each π β N,
1
ππ
β₯
1
4Ξ£π
π₯0 + ππ§π
Ξ¦,π
=1
ππ
{1 + πΌπ
Ξ¦(ππ
4Ξ£π
π₯0 + ππ§π)}
1/π
β₯1
ππ
{1 + πΌπ
Ξ¦(πππ₯0)}1/π
β₯π₯0
Ξ¦,π = 1.
(31)
Let π β β, we deduce that 1 = (1/π0){1 + πΌ
π
Ξ¦(π0π₯0)}1/π
=
βπ₯0βΞ¦,π
.
-
Abstract and Applied Analysis 5
From (I), we obtain that
1 =β π₯0βΞ¦,π
β€1
ππ
{1+ [πΌΞ¦(ππ(1
4Ξ£π
π₯0 + ππ§π)) β 2πΏ0
Γ β«π‘βπ΄π
Ξ¦(π‘, ππ
Γ (1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘]
π
}
1/π
.
(32)
Now we consider the following two subcases.(a) Consider β«
π‘βπ΄π
Ξ¦(π‘, ππ((1/4)Ξ£
π|π₯0(π‘) + ππ§
π(π‘)|))ππ‘ > 0
for some π β N.Then we obtain
1 =β π₯0βΞ¦,π
β€1
ππ
{1 + [πΌΞ¦(ππ(1
4Ξ£π
π₯0 + ππ§π)) β 2πΏ0
Γ β«π‘βπ΄π
Ξ¦(π‘, ππ
Γ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘]
π
}
1/π
<1
ππ
{1 + πΌπ
Ξ¦(ππ(1
4Ξ£π
π₯0 + ππ§π))}
1/π
= 1,
(33)
a contradiction.(b) Consider β«
π‘βπ΄π
Ξ¦(π‘, ππ((1/4)Ξ£
π|π₯0(π‘) + ππ§
π(π‘)|))ππ‘ = 0
for any π β N.For π large enough, we observe that
ππ>1 β 2πΏ
0
1 β πΏ0
π0. (34)
Hence, we get
0 = β«π‘βπ΄π
Ξ¦(π‘, ππ(1
4Ξ£π
π₯0 (π‘) + ππ§π (π‘))) ππ‘
β₯ β«π‘βπ΄π
Ξ¦(π‘,
ππ
1 β 2πΏ0
π₯0(π‘)
) ππ‘
β₯ β«π‘βπ΄π
Ξ¦(π‘,
π0
1 β πΏ0
π₯0(π‘)
) ππ‘ β₯ 0.
(35)
Thus, we see the equalityβ«π‘βπ΄π
Ξ¦(π‘, |(π0/(1βπΏ
0))π₯0(π‘)|) ππ‘ = 0
holds for π large enough. It follows that
π0
1 β πΏ0
π₯0(π‘)
β€ π (π‘) , π-a.e. π‘ β π΄
π (36)
since π(π΄π) > 0 for π large enough.
On the other hand, by (3), we deduce that
π0π₯0 (π‘) β₯ π (π‘) , π-a.e. π‘ β π΄π. (37)
Hence, we get a contradiction:
π0
1 β πΏ0
π₯0(π‘)
β₯
π (π‘)
1 β πΏ0
> π (π‘) , π-a.e. π‘ β π΄π. (38)
Theorem 4. Assume 1 β€ π < β; then the following assertionsare equivalent:
(1) πΏΞ¦,π
is complex midpoint locally uniformly convex;
(2) πΏΞ¦,π
is complex strictly convex;
(3) π(π‘) = 0 for π-a.e. π‘ β π.
Proof. The implication (1) β (2) is trivial. Now assume thatπΏΞ¦,π
is complex strictly convex. If π{π‘ β π : π(π‘) > 0} > 0, letπ0= {π‘ β π : π(π‘) > 0} and it is not difficult to find an element
π₯ β π(πΏΞ¦,π) satisfying supp π₯ = π \ π
0. Take π β πΎ
π(π₯), and
define
π¦ (π‘) ={
{
{
π (π‘)
2πfor π‘ β π
0,
π₯ (π‘) for π‘ β π \ π0.
(39)
Obviously, βπ¦βΞ¦,π
β₯ βπ₯βΞ¦,π
= 1. On the other hand,
π¦Ξ¦,π β€
1
π{1 + [β«
π‘βπ0
Ξ¦(π‘,π (π‘)
2) ππ‘
+β«π\π0
Ξ¦ (π‘, ππ₯ (π‘)) ππ‘]
π
}
1/π
=1
π(1 + πΌ
π
Ξ¦(ππ₯))1/π
= 1.
(40)
Thus, βπ¦βΞ¦,π
= (1/π)(1 + πΌπ
Ξ¦(ππ¦))1/π
= 1. However, for π‘ βπ0, we find π|π¦(π‘)| = π(π‘)/2 < π(π‘), which implies π¦ β π(πΏ
Ξ¦,π)
is not a complex extreme point of π΅(πΏΞ¦,π) fromTheorem 3.
(3) β (1). Suppose that π₯ β π(πΏΞ¦,π) is not a complex
strongly extreme point of π΅(πΏΞ¦,π). It follows fromTheorem 3
that π{π‘ β π : π0|π₯(π‘)| < π(π‘)} > 0 for some π
0β πΎπ(π₯),
consequently π{π‘ β π : π(π‘) > 0} > 0which is a contradiction.
Remark 5. If π = β then π-Amemiya norm equals Luxem-burg norm, the problem of complex convexity of Musielak-Orlicz function spaces equipped with the Luxemburg normhas been investigated in [8].
Conflict of Interests
The authors declare that there is no conflict of interestsregarding the publication of this paper.
-
6 Abstract and Applied Analysis
Acknowledgments
This work is supported by Grants from HeilongjiangProvincial Natural Science Foundation for Youths (no.QC2013C001), Natural Science Foundation of HeilongjiangEducational Committee (no. 12531099), Youth Science Fundof Harbin University of Science and Technology (no.2011YF002), and Tianyuan Funds of the National NaturalScience Foundation of China (no. 11226127).
References
[1] O. Blasco and M. PavlovicΜ, βComplex convexity and vector-valued Littlewood-Paley inequalities,β Bulletin of the LondonMathematical Society, vol. 35, no. 6, pp. 749β758, 2003.
[2] C. Choi, A. KaminΜska, and H. J. Lee, βComplex convexity ofOrlicz-Lorentz spaces and its applications,β Bulletin of the PolishAcademy of Sciences:Mathematics, vol. 52, no. 1, pp. 19β38, 2004.
[3] H. Hudzik and A. Narloch, βRelationships betweenmonotonic-ity and complex rotundity properties with some consequences,βMathematica Scandinavica, vol. 96, no. 2, pp. 289β306, 2005.
[4] H. J. Lee, βMonotonicity and complex convexity in Banachlattices,β Journal of Mathematical Analysis and Applications, vol.307, no. 1, pp. 86β101, 2005.
[5] H. J. Lee, βComplex convexity and monotonicity in Quasi-Banach lattices,β Israel Journal of Mathematics, vol. 159, no. 1, pp.57β91, 2007.
[6] M. M. CzerwinΜska and A. KaminΜska, βComplex rotunditiesand midpoint local uniform rotundity in symmetric spaces ofmeasurable operators,β Studia Mathematica, vol. 201, no. 3, pp.253β285, 2010.
[7] E. Thorp and R. Whitley, βThe strong maximum modulustheorem for analytic functions into a Banach space,β Proceedingsof the AmericanMathematical Society, vol. 18, pp. 640β646, 1967.
[8] L. Chen, Y. Cui, and H. Hudzik, βCriteria for complex stronglyextreme points of Musielak-Orlicz function spaces,β NonlinearAnalysis: Theory, Methods & Applications, vol. 70, no. 6, pp.2270β2276, 2009.
[9] S. Chen, Geometry of Orlicz Spaces, Dissertationes Mathemati-cae, 1996.
[10] Y. Cui, L. Duan, H. Hudzik, and M. WisΕa, βBasic theory of p-Amemiya norm in Orlicz spaces (1 β€ π β€ β): extreme pointsand rotundity in Orlicz spaces endowed with these norms,βNonlinear Analysis: Theory, Methods & Applications, vol. 69, no.5-6, pp. 1796β1816, 2008.
-
Submit your manuscripts athttp://www.hindawi.com
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
MathematicsJournal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Mathematical Problems in Engineering
Hindawi Publishing Corporationhttp://www.hindawi.com
Differential EquationsInternational Journal of
Volume 2014
Applied MathematicsJournal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Probability and StatisticsHindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Journal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Mathematical PhysicsAdvances in
Complex AnalysisJournal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
OptimizationJournal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
CombinatoricsHindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
International Journal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Operations ResearchAdvances in
Journal of
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Function Spaces
Abstract and Applied AnalysisHindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
International Journal of Mathematics and Mathematical Sciences
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
The Scientific World JournalHindawi Publishing Corporation http://www.hindawi.com Volume 2014
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Algebra
Discrete Dynamics in Nature and Society
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Decision SciencesAdvances in
Discrete MathematicsJournal of
Hindawi Publishing Corporationhttp://www.hindawi.com
Volume 2014 Hindawi Publishing Corporationhttp://www.hindawi.com Volume 2014
Stochastic AnalysisInternational Journal of