Kolmogorov Complexity and Computational Complexity by Osamu Watanabe

By Osamu Watanabe

The mathematical idea of computation has given upward push to 2 very important ap­ proaches to the casual thought of "complexity": Kolmogorov complexity, usu­ best friend a complexity degree for a unmarried item reminiscent of a string, a series etc., measures the volume of knowledge essential to describe the article. Compu­ tational complexity, frequently a complexity degree for a suite of items, measures the compuational assets essential to realize or produce parts of the set. The relation among those complexity measures has been thought of for greater than 20 years, and will attention-grabbing and deep observations were got. In March 1990, the Symposium on concept and alertness of minimum­ size Encoding was once held at Stanford collage as part of the AAAI 1990 Spring Symposium sequence. a few periods of the symposium have been devoted to Kolmogorov complexity and its kinfolk to the computational complexity the­ ory, and perfect expository talks got there. Feeling that, as a result significance of the cloth, a way will be came upon to proportion those talks with researchers within the computing device technological know-how group, I requested the audio system of these periods to jot down survey papers in response to their talks within the symposium. In reaction, 5 audio system from the periods contributed the papers which seem during this book.

Show description

Read Online or Download Kolmogorov Complexity and Computational Complexity PDF

Best mathematics books

Foundations of Optimization (Graduate Texts in Mathematics, Volume 258)

The ebook supplies a close and rigorous therapy of the idea of optimization (unconstrained optimization, nonlinear programming, semi-infinite programming, and so forth. ) in finite-dimensional areas. the basic result of convexity concept and the speculation of duality in nonlinear programming and the theories of linear inequalities, convex polyhedra, and linear programming are coated intimately.

Metodos de Bezier y B-splines Spanish

Este libro provee una base sólida para los angeles teoría de curvas de Bézier y B-spline, revelando su elegante estructura matemática. En el texto se hace énfasis en las nociones centrales del Diseño Geométrico Asistido por Computadora con l. a. intención de dar un tratamiento analíticamente claro y geométricamente intuitivo de los principios básicos del área.

Methods of A. M. Lyapunov and their Application

The aim of the current version is to acquaint the reader with
new effects received within the idea of balance of movement, and also
to summarize convinced researches by way of the writer during this box of
mathematics. it truly is identified that the matter of balance reduces not
only to an research of structures of standard differential equations
but additionally to an research of structures of partial differential
equations. the idea is consequently constructed during this e-book in such
a demeanour as to make it appropriate to the answer of balance problems
in the case of platforms of standard differential equations as
well as in terms of platforms of partial differential equations.
For the reader's profit, we will now checklist in short the contents of
the current monograph.
This publication involves 5 chapters.
In Sections 1-5 of bankruptcy I we provide the imperative information
connected with the concept that of metric house, and likewise clarify the
meaning of the phrases with the intention to be used less than. Sections 6 and seven are
preparatory and comprise examples of dynamical platforms in various
spaces. In part eight we outline the idea that of dynamical systems
in metric area, and in addition provide the valuable theorems from the
book [5] of Nemytsky and Stepanov. In Sections 9-10 we give
the relevant definitions, hooked up with the concept that of stability
in the experience of Lyapunov of invariant units of a dynamical system,
and additionally examine the houses of definite strong invariant sets.
In part eleven we clear up the matter of a qualitative construction
of an area of a good (asymptotically reliable) invariant set. In
particular, it truly is demonstrated that for balance within the feel of Lyapunov
of an invariant set M of a dynamical approach f(p, t) it's necessary,
and in terms of the presence of a small enough compact local of the set M it's also enough, that there exist no
motions· f(p, t), P eM, having ex-limit issues in M. The results
obtained listed here are new even to the speculation of normal differential
equations. In Sections 12-13 we provide standards for balance and
instability of invariant units as a result of definite functionals.
These functionals are the analogue of the Lyapunov functionality and
therefore the tactic constructed right here should be regarded as a certain
extension of Lyapunov's moment approach. all of the result of these
sections are neighborhood in personality. We cite, for instance, considered one of these.
In order for an invariant set M to be uniformly asymptotically
stable, it will be important and enough that during a undeniable neighborhood
S(M, r) of M there exists a practical V having the following
1. Given a bunch c1 > zero, it's attainable to discover c2 > zero such
that V(P) > c2 for p(p, M) > c1.
2. V(p) ~ zero as p(p, M) ~ 0.
3. The functionality V(f(p, t)) doesn't raise for f(p, t) e S(M, r)
and V(f(p, t)) ~ zero as t ~ + oo uniformly relative to p e S(M, zero for p(p, M) =I= 0.
2. For /'2 > zero it truly is attainable to discover /'1 and cx1 such that
V(p) cx1 for p(p, M) > /'2·
3. V and (/) ~ zero as p(p, M) ~ 0.
4. dVfdt = fP(1 + V).
5. V(p) ~ -1 as p(p, q) ~ zero, peA, q E A"-. A, and q eM.
Here, as above, p and q are components of tl;te house R, and p(p, M)
is the metric distance from the purpose p to the set M. part 15 features a approach that makes it attainable to estimate the distance
from the movement to the investigated invariant set. The theorems
obtained during this part will be regarded as vitamins to
Sections 12-14. Sections 1-15 conceal the contents of the 1st chapter,
devoted to an research of invariant units of dynamical systems.
In the second one bankruptcy we supply a constructed program of the
ideas and techniques of the 1st bankruptcy to the idea of ordinary
differential equations. In part 1 of bankruptcy 2 we enhance the
theorem of part 14 for desk bound platforms of differential equations,
and it's proven thereby that the Lyapunov functionality V can
be chosen differentiable to an identical order because the correct members
of the procedure. within the similar part we provide a illustration of
this functionality as a curvilinear vital and remedy the matter of
the analytic constitution of the ideal participants of the approach, which
right contributors have a quarter of asymptotic balance that's prescribed
beforehand. In part 2 of bankruptcy II we reflect on the
case of holomorphic correct participants. The functionality V, the existence
of that's demonstrated in part 1 of this bankruptcy, is represented
in this situation within the type of convergent sequence, the analytic continuation
of which makes it attainable to acquire the functionality within the entire
region of asymptotic balance. the strategy of development of such
series can be utilized for an approximate answer of convinced non-local
problems including the development of bounded strategies in
the kind of sequence, that converge both for t > zero or for t e (- oo,
+ oo). those sequence are acquired from the truth that any bounded
solution is defined via capabilities which are analytic with respect
to t in a undeniable strip or part strip, containing the genuine half-axis.
In part three of bankruptcy II we strengthen the idea of equations with
homogeneous correct contributors. it truly is proven particularly that in
order for the 0 answer of the method to be asymptotically
stable, it's important and enough that there exist homogeneous
functions: one optimistic convinced W of order m, and one
negative yes V of order (m + 1 - #). such that dVfdt = W,
where # is the index of homogeneity of the perfect participants of the
system. If the correct individuals of the process are differentiable, then
these features fulfill a process of partial differential equations,
the answer of which are present in closed shape. This circumstance
makes it attainable to provide an important and adequate situation for asymptotic balance within the case whilst the proper members
are sorts of measure p. , at once at the coeffilients of those forms.
In Sections four and five of bankruptcy II we contemplate a number of doubtful
cases: okay 0 roots and 2k natural imaginary roots. We receive here
many effects at the balance, and in addition at the lifestyles of integrals
of the procedure and of the kinfolk of bounded suggestions. In part 6
of bankruptcy II the idea constructed in bankruptcy I is utilized to the
theory of non-stationary platforms of equations. In it are formulated
theorems that keep on with from the result of part 14, and a method
is additionally proposed for the research of periodic solutions.
In part 1 of bankruptcy III we resolve the matter of the analytic
representation of options of partial differential equations in the
case whilst the stipulations of the concept of S. Kovalevskaya are
not chuffed. The theorems bought listed below are utilized in part 2
of bankruptcy III to structures of normal differential equations. This
supplements the investigations of Briot and Bouquet, H. Poincare,
Picard, Horn, and others, and makes it attainable to enhance in
Section three of bankruptcy III a mode of creating sequence, describing
a kin of 0-curves for a process of equations, the expansions of
the correct contributors of which don't comprise phrases that are linear
in the features sought. the strategy of development of such series
has made it attainable to offer one other method of the answer of the
problem of balance relating to structures thought of in Sections 3-5
of bankruptcy II and to formulate theorems of balance, in keeping with the
properties of strategies of yes platforms of nonlinear algebraic
equations. therefore, the 3rd bankruptcy represents an try out at
solving the matter of balance due to Lyapunov's first
In bankruptcy IV we back contemplate metric areas and households of
transformations in them. In part I of bankruptcy IV we introduce
the inspiration of a normal approach in metric space.
A common approach is a two-parameter family members of operators from
R into R, having houses just like these present in ideas of
the Cauchy challenge and the combined challenge for partial differential
equations. hence, the final structures are an summary version of
these difficulties. We additionally strengthen right here the idea that of balance of
invariant units of common structures. In part 2 of bankruptcy IV,
Lyapunov's moment procedure is prolonged to incorporate the answer of difficulties of balance of invariant units of normal platforms. The
theorems acquired right here yield important and enough conditions.
They are according to the tactic of investigating two-parameter
families of operators as a result of one-parameter households of
functionals. We additionally suggest the following a normal technique for estimating
the distance from the movement to the invariant set. In part three of
Chapter IV are given numerous purposes of the built theory
to the Cauchy challenge for platforms of normal differential equations.
Results are got the following that aren't present in the identified literature.
The 5th bankruptcy is dedicated to definite purposes of the developed
theory to the research of the matter of balance of the
zero answer of structures of partial differential equations within the case
of the Cauchy challenge or the combined challenge. In part I of
Chapter V are built basic theorems, which include a style of
solving the steadiness challenge and that are orientative in character.
In Sections 2-3 of bankruptcy V are given particular platforms of partial
differential equations, for which standards for asymptotic balance are
found. In part three the research of the soundness of a solution
of the Cauchy challenge for linear structures of equations is carried
out as a result of a one-parameter kin of quadratic functionals,
defined in W~N>. balance standards normalized to W~NJ are
obtained the following. notwithstanding, the imbedding theorems make it possible
to isolate these instances while the soundness could be normalized in C.
In an analogous part are given numerous examples of investigation
of balance in terms of the combined problem.
For a winning knowing of the complete fabric discussed
here, it is important to have an information of arithmetic equivalent
to the scope of 3 collage classes. notwithstanding, in a few places
more really expert wisdom can be worthy.

Historiography of Mathematics in the 19th and 20th Centuries

This booklet addresses the historiography of arithmetic because it was once practiced in the course of the nineteenth and twentieth centuries by means of paying targeted realization to the cultural contexts during which the historical past of arithmetic was once written. within the nineteenth century, the heritage of arithmetic was once recorded by means of a various variety of individuals proficient in quite a few fields and pushed by means of diverse motivations and goals.

Extra resources for Kolmogorov Complexity and Computational Complexity

Example text

Ko. On the notion of infinite pseudorandom sequences: Theoret. Comput. Sci. 39:9-33, 1986. K. Ko and U. Schoning. On circuit-size complexity and the low hierarchy in N P. SIAM J. Computing 14:41-51, 1985. S. Kurtz. On the random oracle hypothesis. Info. and Control 57:40-47, 1983. R. Ladner, N. Lynch, and A. Selman. A comparison of polynomial-time reducibilities. Theoret. Comput. Sci. 1:103-123, 1975. M. Li and P. Vitanyi. Applications of Kolmogorov complexity in the theory of computation. Complexity Theory Retrospective, A.

Comput. Sci. 39:9-33, 1986. K. Ko and U. Schoning. On circuit-size complexity and the low hierarchy in N P. SIAM J. Computing 14:41-51, 1985. S. Kurtz. On the random oracle hypothesis. Info. and Control 57:40-47, 1983. R. Ladner, N. Lynch, and A. Selman. A comparison of polynomial-time reducibilities. Theoret. Comput. Sci. 1:103-123, 1975. M. Li and P. Vitanyi. Applications of Kolmogorov complexity in the theory of computation. Complexity Theory Retrospective, A. ), Springer-Verlag Publ. Co. 147-203,1990.

A set A is self-p-printable if and only if A E K A[log, poly], that is, there is a universal oracle machine U and constants c and k with the property On Sets with Small Information Content 29 that for almost every x, x is in A if and only if x is in K UA [c . log n, n k) where n= Ixl. The idea of a "self-p-printable set" is easily generalized. For sets A and B, A is P(B )-printable if there is a deterministic oracle machine that computes relative to B the function enumA and that runs in polynomial time.

Download PDF sample

Rated 4.22 of 5 – based on 46 votes