Get Differential Equations and Dynamical Systems 2 USUZCAMP Urgench Uzbekistan August 8 12 2017 Abdulla Azamov Free All Chapters
Get Differential Equations and Dynamical Systems 2 USUZCAMP Urgench Uzbekistan August 8 12 2017 Abdulla Azamov Free All Chapters
Get Differential Equations and Dynamical Systems 2 USUZCAMP Urgench Uzbekistan August 8 12 2017 Abdulla Azamov Free All Chapters
OR CLICK LINK
https://textbookfull.com/product/differential-
equations-and-dynamical-systems-2-usuzcamp-
urgench-uzbekistan-august-8-12-2017-abdulla-
azamov/
Read with Our Free App Audiobook Free Format PFD EBook, Ebooks dowload PDF
with Andible trial, Real book, online, KINDLE , Download[PDF] and Read and Read
Read book Format PDF Ebook, Dowload online, Read book Format PDF Ebook,
[PDF] and Real ONLINE Dowload [PDF] and Real ONLINE
More products digital (pdf, epub, mobi) instant
download maybe you interests ...
https://textbookfull.com/product/algebra-complex-analysis-and-
pluripotential-theory-2-usuzcamp-urgench-uzbekistan-
august-8-12-2017-zair-ibragimov/
https://textbookfull.com/product/non-linear-differential-
equations-and-dynamical-systems-1st-edition-luis-manuel-braga-da-
costa-campos/
https://textbookfull.com/product/ordinary-differential-equations-
and-boundary-value-problems-volume-i-advanced-ordinary-
differential-equations-1st-edition-john-r-graef/
https://textbookfull.com/product/dynamical-systems-in-
theoretical-perspective-lodz-poland-december-11-14-2017-jan-
awrejcewicz/
Modelling with Ordinary Differential Equations Dreyer
https://textbookfull.com/product/modelling-with-ordinary-
differential-equations-dreyer/
https://textbookfull.com/product/elementary-differential-
equations-second-edition-roberts/
https://textbookfull.com/product/systems-of-nonlinear-partial-
differential-equations-applications-to-biology-and-engineering-
mathematics-and-its-applications-a-w-leung/
https://textbookfull.com/product/boundary-value-problems-for-
systems-of-differential-difference-and-fractional-equations-
positive-solutions-1st-edition-johnny-henderson/
https://textbookfull.com/product/simultaneous-systems-of-
differential-equations-and-multi-dimensional-vibrations-1st-
edition-luis-manuel-braga-da-costa-campos/
Springer Proceedings in Mathematics & Statistics
Abdulla Azamov
Leonid Bunimovich
Akhtam Dzhalilov
Hong-Kun Zhang Editors
Differential
Equations and
Dynamical
Systems
2 USUZCAMP, Urgench, Uzbekistan,
August 8–12, 2017
Springer Proceedings in Mathematics & Statistics
Volume 268
Springer Proceedings in Mathematics & Statistics
This book series features volumes composed of selected contributions from
workshops and conferences in all areas of current research in mathematics and
statistics, including operation research and optimization. In addition to an overall
evaluation of the interest, scientific quality, and timeliness of each proposal at the
hands of the publisher, individual contributions are all refereed to the high quality
standards of leading journals in the field. Thus, this series provides the research
community with well-edited, authoritative reports on developments in the most
exciting areas of mathematical and statistical research today.
Editors
Differential Equations
and Dynamical Systems
2 USUZCAMP, Urgench, Uzbekistan,
August 8–12, 2017
123
Editors
Abdulla Azamov Akhtam Dzhalilov
Institute of Mathematics Turin Polytechnic University
Uzbekistan Academy of Sciences Tashkent, Uzbekistan
Tashkent, Uzbekistan
Hong-Kun Zhang
Leonid Bunimovich Department of Mathematics and Statistics
School of Mathematics University of Massachusetts Amherst
Georgia Institute of Technology Amherst, MA, USA
Atlanta, GA, USA
Mathematics Subject Classification (2010): 37E10, 26A18, 28D05, 34C05, 34C28, 34D05, 34D45,
37C55, 37A05, 37A60, 37A50, 37D50, 37D25
This Springer imprint is published by the registered company Springer Nature Switzerland AG
The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland
Contents
v
vi Contents
1 Introduction
A. Habibulla (B)
School of Quantitative Sciences, University Utara Malaysia,
CAS 06010, UUM Sintok, Kedah Darul Aman, Malaysia
e-mail: akhadkulov@yahoo.com
D. Akhtam
Turin Polytechnic University, Kichik Halka yuli 17,
Tashkent 100095, Uzbekistan
e-mail: a_dzhalilov@yahoo.com
K. Khanin
Department of Mathematics, University of Toronto, 40 St. George Street,
Toronto, Ontario M5S 2E4, Canada
e-mail: khanin@math.toronto.edu
© Springer Nature Switzerland AG 2018 1
A. Azamov et al. (eds.), Differential Equations and Dynamical Systems,
Springer Proceedings in Mathematics & Statistics 268,
https://doi.org/10.1007/978-3-030-01476-6_1
2 A. Habibulla et al.
Δ2 f (x, τ ) = f (x + τ ) + f (x − τ ) − 2 f (x)
where x ∈ S 1 and τ ∈ [0, 21 ]. Suppose that there exists a constant C > 0 such that
the following inequality holds:
|h (x) − h (y)| ≤ Aωγ (|x − y|), |(h −1 (x)) − (h −1 (y)) | ≤ Aωγ (|x − y|)
endpoints x0 and xqn = f (x0 ), such that, for n odd, xqn is to the left of x0 , and for
qn
n even, it is to its right with respect to the orientation induced from the real line.
Denote by Δi(n) := f i (Δ(n) (n)
0 ), i ≥ 1, the iterates of the interval Δ0 under f. It is
well known that the set Pn := Pn (x0 , f ) of intervals with mutually disjoint interiors
defined as
Pn = {Δi(n−1) , 0 ≤ i < qn } ∪ {Δ(n) j , 0 ≤ j < qn }.
determines a partition of the circle for any n. The partition Pn is called the nth
dynamical partition of S 1 . Obviously, the partition Pn+1 is a refinement of the partition
Pn : indeed, the intervals of order n belong to Pn+1 and each interval Δi(n−1) 0 ≤ i <
qn is partitioned into an+1 + 1 intervals belonging to Pn such that
an+1 −1
Δi(n−1) = Δi(n+1) ∪ (n)
Δi+q n−1 +sqn
. (2)
s=0
(x)−1
i n
ζn (x) = log f ( f s (x)).
s=0
where 0 < j < qn−1 and 0 < i < qn . This and by (2) we get
⎧
⎪
⎪ 0, if x ∈Δ(n+1)
⎪
⎨q
0
n+1 − j, if x ∈ Δ(n)
i n+1 (x) = j
(n)
⎪
⎪ q − (i + q + sq ), if x ∈ Δi+q
⎪
⎩
n+1 n−1 n n−1 +sqn
qn − i, if x ∈ Δi(n+1)
where 0 < j < qn−1 , 0 < i < qn and 0 ≤ s < an+1 . Therefore
⎧
⎪
⎨ 0, (n)
if x ∈ Δ 0 ∪ Δi
(n+1)
(n)
i n+1 (x) − i n (x) = an+1 qn , if x ∈ Δ j
⎪
⎩ (a (n)
n+1 − s − 1)qn , if x ∈ Δi+qn−1 +sqn
where 0 < j < qn−1 , 0 < i < qn and 0 ≤ s < an+1 . Using the last relation we get
On Linearization of Circle Diffeomorphisms 5
By Theorem 7.1 and Lemma 8.2 in [1] we have Kn ≤ Cn −γ . Since the rotation
number is bounded type we get
n+ p−1
1
ζn+ p (x) − ζn (x)∞ ≤ C . (4)
m=n
mγ
Proof It is easy to see that for any x ∈ S 1 there exists n 0 := n 0 (x) such that
i n ( f (x)) = i n (x) − 1 for all n ≥ n 0 . This and by the definition of ζn we get
for all n ≥ n 0 . Taking the limit as n → ∞ we get (5). Next we show ζ is continuous
at x = x0 . One can see ζn (x0 ) = 0 for all n ≥ 1, so ζ (x0 ) = 0. Take any z ∈ Δ (n)
0 . It
is obvious that i j (z) = 0 for every j ≤ n, so ζ j (z) = 0 for every j ≤ n. In particular
p−1
ζn+ p (z) = ζn+m+1 (z) − ζn+m (z).
m=0
n+ p−1
1
|ζn+ p (z)| ≤ C .
m=n
mγ
Consequently
lim sup |ζ (z)| = 0.
n→∞ (n)
z∈Δ 0
Lemma 3 Let f satisfies the conditions of Theorem 2. There exists C > 0 such that
Proof Consider the points xi and xi+qn−1 +sqn where 1 ≤ s ≤ an+1 . It is clear that
xi , xi+qn−1 +sqn ∈ Δi(n−1) . The relation (5) implies
∞
|ζ (x j ) − ζ (xi )| ≤ am+1 Km .
m=n
∞
1 C
|ζ (x j ) − ζ (xi )| ≤ C γ
≤ γ −1 . (7)
m=n
m n
It is obvious that
|Δi(n+1) | ≤ |x j − xi | ≤ |Δi(n−1) |.
1
n=O . (8)
log |x j − xi |
C
|ζ (x j ) − ζ (xi )| ≤ γ −1
. (9)
log |x j − xi |
4 Proof of Theorem 2
−1 −1 1
ϕ( f (x)) = eζ ( f (x)) eζ (t) dt = eζ (x)−log f (x)
eζ (t) dt = ϕ(x).
S1 S1 f (x)
f (x0 )
h( f (x)) = h(x) + ϕ(t)dt. (11)
x0
Denote by H and F the lift functions of h and f respectively. From the relation
(11) it follows that
f (x0 )
H (F n (x)) = H (x) + n ϕ(t)dt, x ∈R (12)
x0
for all n ≥ 1. It is well known (see for instance [4]) that there exists a one periodic
functions H such that H = H + Id. Therefore, by (12) we get
f (x0 )
F n (x) − x H (x) − H (F n (x))
= + ϕ(t)dt. (13)
n n x0
and consequently
|h (x) − h (y)| ≤ Cωγ (|x − y|)
References
1. Akhadkulov, H., Dzhalilov, A., Khanin, K.: Notes on a theorem of Katznelson and Ornstein.
Dis. Con. Dyn. Sys. 37(9), 4587–4609 (2017)
2. Akhadkulov, H., Dzhalilov, A., Noorani, M.S.: On conjugacies between piecewise-smooth
circle maps. Nonlinear Anal. Theory Methods Appl. 99, 1–15 (2014)
3. Denjoy, A.: Sur les courbes définies par les équations différentielles à la surface du tore. J.
Math. Pures Appl. 11, 333–375 (1932)
4. Herman, M.: Sur la conjugaison différentiable des difféomorphismes du cercle à des rotations.
Inst. Hautes Etudes Sci. Publ. Math. 49, 5–234 (1979)
5. Katznelson, Y., Ornstein, D.: The differentiability of the conjugation of certain diffeomorphisms
of the circle. Ergod. Theor. Dyn. Syst. 9, 643–680 (1989)
6. Katznelson, Y., Ornstein, D.: The absolute continuity of the conjugation of certain diffeomor-
phisms of the circle. Ergod. Theor. Dyn. Syst. 9, 681–690 (1989)
7. Khanin, K.M., Sinai, Y.G.: A new proof of M. Herman’s theorem. Commun. Math. Phys. 112,
89–101 (1987)
8. Khanin, K.M., Sinai, Y.G.: Smoothness of conjugacies of diffeomorphisms of the circle with
rotations. Russ. Math. Surv. 44, 69–99 (1989); Trans. Usp. Mat. Nauk. 44, 57–82 (1989)
9. Khanin, K.M., Teplinsky, AYu.: Herman’s theory revisited. Invent. Math. 178, 333–344 (2009)
10. Poincaré, H.: Mémoire sur les courbes définies par une équation différentielle (I). J. Math.
Pures Appl. 7, 375–422 (1881)
11. Yoccoz, J.C.: Conjugaison différentiable des difféomorphismes du cercle dont le nombre de
rotation vérifie une condition diophantienne. Ann. Sci. École Norm. Sup. (4) 17(3), 333–359
(1984)
The Fujita and Secondary Type Critical
Exponents in Nonlinear Parabolic
Equations and Systems
Aripov Mersaid
1 Introduction
This paper devoted to a various extensions of a result of Fujita [1] and secondary
critical exponent for the initial value problem to the reaction-diffusion equation
∂u p−2
= ∇(u m−1 ∇u k ∇u) + div(c(t)u) + γ (t)u β , (1)
∂t
A. Mersaid
National university of Uzbekistan, Tashkent, Uzbekistan
e-mail: mirsaidaripov@mail.ru
∂u p−2
A(u, v) = − + div vm 1 −1 ∇u k ∇u − div(c(t)u) + γ (t)u β1 = 0,
∂t
∂v p−2
B(u, v) = − + div u m 2 −1 ∇vk ∇v − div(c(t)v) + γ (t)vβ2 = 0, (3)
∂t
For system (3) in general we will study a class of weak solutions with properties
Consider a global solvability of the problem (1), (2). Different qualitative properties
of solution for the particular value of numerical parameters of the Cauchy and bound-
ary value problem to the Eq. (1) intensively studied by many authors [1–8, 18–24].
First Fujita [1] for the problem (1) showed that if γ (t) = 1, c(t) = 0, m = 1, p = 2,
1 < β 1 + 2/N , all solutions are blow up in time [1], while if β > 1 + 2/N the
problem has a global solution for small initial data. Value of numerical parameter
when β = 1 + 2/N is called the Fujita type critical exponent.
Samarskii A.A. and etc. [24] showed that condition of the global solvability when
γ (t) = 1, c(t) = 0, p = 2 is β > m + 1 + 2/N . After V. Galaktionov establish
the following condition of the global solvability β > p − 1 + p/N (see [24]) when
in (1) γ (t) = 1, c(t) = 0, m = 1, k = 1 ( p−Laplacian equation). More general
condition of a global solvability when c(t) = 0, k = 1 were established in [19], when
γ (t) = 1, c(t) = 0, k = 1 the variable density case of the Eq. (1) considered in works
[2–5, 20–23]. The condition of the global solvability in the case c(t) = 0, k = 1
obtained in the work [20] The role of the Fujita and secondary critical exponents
type intensively discussed in literature [1–6, 18–24].
12 A. Mersaid
Usually for establishing blow up properties solution applied the. In [5] authors
to show the blow up phenomena not use technique the Zel’dovich–Kompaneets–
Barenblatt solutions [24], since the construction of such type of function is more
complicated for considered problem. Therefore, authors obtain a result by multiply-
ing on a special factor, which has convenient properties. In particular, by choosing
the parameters of the factor and using the properties of the solution, obtained the
inequality, which allows proving blow up property. Considering semi linear case of
the system (3) when in k = m = 1, p = 2 first Escobedo-Herero [11] establish the
Fujita type global solvability. Notice that the Fujita type global solvability of the
problem (3), (4) is not studied yet.
This paper discusses problem the Fujita type global solvability and secondary
critical exponents for double nonlinear degenerate equation (1) and system (3) using
self-similar approach [20]. The algorithm establishing both critical exponents using
self-similar analysis of solutions is suggested. Based on an invariant group (self-
similar) analysis the method of establishing of a value of the Fujita type critical
exponents for single degenerate type parabolic equation and system (3) is given. The
Fujita type condition of a global solvability to the problem (1), (2) are established. It is
shown that formally a value of the second critical exponent for degenerate type double
nonlinear parabolic equation and they system is the roots of the linear algebraic
system equations. The estimate of weak solutions to the problem (3), (4) is obtained.
Depending on value of numerical parameters, the problem of an appropriate initial
approximation solution for an iterative process, leading to the quick convergence
with necessary accuracy is solved.
In recent years, as mentioned above many authors [2–10, 18, 19, 21–23] have
studied the different qualitative properties of solutions to the Cauchy problem (1)
and their variants (see ([2–10, 23] and the references therein)). Zheng et al. [22]
investigate the blow-up properties of the positive solution of the Cauchy problem (1)
in the case c(t) = 0, γ (t) = 1, and established a secondary critical exponent for the
decay initial value at infinity. They notice in this case the problem of the existence
and nonexistence of global solutions of the Cauchy problem not considered.
Under some suitable assumptions, the existence, uniqueness and regularity of a
weak solution to the Cauchy problem (1) and their variants have been extensively
investigated by many authors (see [2–11, 20–23] and the references therein).
The first goal of this paper is to study the blow-up behavior of solution u(x, t)
of (1) when the initial data u 0 (x) has slow decay near x = ∞. For instance, in the
following case
u 0 (x) ∼
= M|x|−a , M > 0, a ≥ 0, (5)
In recent years, many authors have studied the properties of solutions to the
Cauchy problem (1), (2) and their variants [2–10, 23] and the references therein). In
particular, J.-S. Guo and Y. Y. Guo (see [22] and references) obtained the secondary
critical exponent for the case k = 1, p = 2 and shows there exists a secondary critical
exponent a ∗ = 2/( p − m) such that the solution u(x, t) of (1) blows up in finite time
for the initial data u 0 (x), which behaves like |x|−a at x = ∞ if a ∈ (0, a ∗ ), and there
The Fujita and Secondary Type Critical Exponents… 13
exists a global solution for the initial data u 0 (x), which behaves like |x|−a at x = ∞
if a ∈ (a ∗ , N ).
Mu et al. [22] studied the secondary critical exponent for the p−Laplacian equa-
tion (m = 1) with slow decay initial values and shows that there exists a secondary
critical exponent ac∗ = ( p/(q + 1 − p)) such that the solution u(x, t) of (1) blows
up in finite time for the initial data u 0 (x) which behaves like |x|−a at x = ∞ if
a ∈ (ac∗ , N ), and there exists a global solution for the initial data u 0 (x), which
behaves like |x|−a at x → ∞ if a ∈ (ac∗ , N ).
Recently, Zheng and Mu [9] also investigated the secondary critical exponent for
the doubly degenerate parabolic equation with slow decay initial values and obtained
similar results. Introduce the function
t
γ (y)dy]− β−1 ,
1
z + (t, x) = u(t) f (ξ ), u(t) = [T + (β − 1)
0
γ γ1
f (ξ ) = (a − bξ ) , a > 0. (6)
p p − 1
b = (k( p − 2) + m − 1) p − p/( p−1) , γ = , γ1 = .
p−1 k( p − 2) + m − 1
Below considering the problem Cauchy (1), (2); (3), (4) the algorithm for con-
struction of the Fujita type a critical exponent is suggested and has establish the Fujita
type for critical exponent. Applying this algorithm, condition of a global solvability
Cauchy problem (1), (2) and (3), (4) are obtained.
3 Main Results
This result consist all early known results other authors (Fujita, Samarskii A.A.,
Kurdyumov S.P., Galaktionov V.A., Mikhaylov A.P. and others) on a global solv-
ability problem Cauchy (1), (2). In the case c(t) = 0, γ (t) = 1 we obtain all early
known Fujita type condition of a global solvability [1, 18–22, 24]
14 A. Mersaid
β > k( p − 2) + m + p/N .
3.2 The Fujita Type Global Solvability for the System (3)
Theorem 3 Assume
Then for the solution of the problem (1), (2) in Q the estimate
is hold.
β−1
A( f ) = [[−(N / p) + γ (t)τ (t)ū(t)]β−[k( p−2)+m] + γ (t)τ (t)[ū(t)]β−[k( p−2)+m] f ]f.
16 A. Mersaid
A( f ) ≤ 0 in ξ < a ( p−1)/ p .
f ≤ f in ξ < a ( p−1)/ p .
It means that
u(t, x) ≤ u + (t, x) = u(t) f (ξ ), in Q.
Recently Zheng, Chunlai Mu, Dengming Liu, Xianzhong Yao, and Shouming Zhou
for the decaying initial data establish a secondary critical exponent to the problem (1),
(2) when γ (t) = 1. They for the case c(t) = 0, γ (t) = 1 established that if u 0 (x) ≈
M|x|−a , M > 0 then value a = a∗ = p/(β − k( p − 2) + m) is secondary critical
exponent for the problem Cauchy. The cases k = 1, γ (t) = 1, c(t) = 0, γ (t) =
1, c(t) = 0, k = 1, p = 2 considered in works [1] In particular, J.S. Guo and Y.Y.
Guo (see [22]) when c(t) = 0, γ (t) = 1, k = 1, p = 2 obtained the secondary
critical exponent for the porous medium type equation in high dimensions and proved
existing a secondary critical exponent a = a∗ = 2/(β − m) such that if u 0 (x) ≈
|x|−a the solution of (1) blows up in finite time for the initial data, which behaves
like |x|−a at ∞ if a belongs to (0, a∗ ), and there exists a global solution if a belongs
to (a∗ , N ).
Below we establish asymptotic behavior of the solutions in the secondary critical
exponent case.
Introduce the function
p p−1
f (ξ ) = (a + ξ γ )γ1 , γ = , γ1 = − .
p−1 β − (k ( p − 2) + m)
where
(N − p)β − (k ( p − 2) + m) N
c(m, p, k, N , β) = |kγ1 | p−2 ( p − 1) .
β − (k ( p − 2) + m)
f (ξ ) ≈ cξ −
2
β−m
which used for numerical solution. But, value of constants c is not known. We notice
according the Theorem1 value of constants c is
β−m
1
(N − 2)β − N m
c= , β > N /N − 2, N 3.
β −m
Mentioned authors using this asymptotic of solution solves numerically. But with-
out proving of the Theorem 1 and finding value of constant c. Consider particular
case of the Eq. (1) when γ (t) = 1, c(t) = 0.
Then notice that from (9) in the case m = 1, p = 2, k = l = 1 we have
β−1
1
(N − 2)β − N
c(1, 1, 2, 1, N , β) = .
β −1
where k( p − 1) − 1 > 0.
For p−Laplacian equation (k = m = 1)
(N − p)β − pN
c(1, l, p, 1, N , β) = |kγ1 | p−2 ( p − 1) .
β−p
Notice these results are given in [26] and they are very important for computational
aims.
The proofs of Theorems 2 are based on the transformation of Eq. (1) as follows:
p
f (ξ ) = f (ξ )y(η), η = ln a + ξ p−1
Then with respect to the function y(η) we obtain a new nonlinear equation whose
solution for η → ∞ tends to the constant c indicated in the statement of the theorem.
18 A. Mersaid
∂u p−2
ρ1 (x) = div ρ2 (x)u m−1 ∇u k ∇u + ρ1 (x)γ (t)u β , u(0, x) = u 0 (x) 0, x ∈ R N ,
∂t
(12)
where ρ1 (x) = |x|n 1 , ρ2 (x) = |x|n 2 , n i ∈ R, ∇(·) − grad (·).
x
Consider the functions defined in Q
( p−1)/(k( p−2)+m−1)
z 1 (t, x) = ū(t)y(ξ ), y(ξ ) = (a − ξ p/( p−1) )+ ,
p − (n 1 + n 2 ) p/( p−(n 1 +n 2 )) N − n1
ξ = ϕ(x)[τ (t)]−1/ p , ϕ(x) = |x| , s=p .
p p − (n 1 + n 2 )
N − n1
β > k( p − 2) + m + .
p − (n 1 + n 2 )
N − n1
β > β∗ = (1 + σ )[k( p − 2) + m] + ,
p − (n 1 + n 2 )
N − n1
β = β∗ = (1 + σ )[k( p − 2) + m] + .
p − (n 1 + n 2 )
This result consist all early known results authors [1–6, 18–24] about global
solvability problem Cauchy to the degenerate type Eq. (10)
1
(S − p)β − (1 + σ ) (k ( p − 2) + m) S β−(k( p−2)+m)
c(m, k, p, σ, S) = −|kγ1 | p−2 l( p − 1)
β − (1 + σ ) (k( p − 2))
N − n1
S=p p − (n 1 + n 2 ) > 0, n 1 < N .
p − (n 1 + n 2 )
Another random document with
no related content on Scribd:
The Project Gutenberg eBook of Die
Erfolgreichen
This ebook is for the use of anyone anywhere in the United
States and most other parts of the world at no cost and with
almost no restrictions whatsoever. You may copy it, give it away
or re-use it under the terms of the Project Gutenberg License
included with this ebook or online at www.gutenberg.org. If you
are not located in the United States, you will have to check the
laws of the country where you are located before using this
eBook.
Language: German
Die Erfolgreichen
(Thirty great lives)
1.—10. Tausend
1926
J O S E F S I N G E R VERLAG A.-G., LEIPZIG
Copyright 1926 by Ernst Angel-Verlag, Berlin-Schöneberg
Autorisierte Übertragung aus dem Englischen
von Dr. Walter J. Briggs