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Presents methods for testing sets of special functions for completeness and basis properties, mostly in L2 and L2 spaces.
This book constructs an idealized version of what the author calls syntacticism, a school of thought in the philosophy of logic which is congenial to analytical philosophy, logical positivism, and anti-metaphysical nominalism. It examines in detail both technical metalogical and broad philosophic issues associated with this way of thinking about logic, and specifically addresses anomalies around symbolic expressivity, which is crucial for this approach, with a view to provide both a deeper understanding and a critique. The range of fields and interests addressed include: the philosophy of logic, formal logic and mathematical logic, the analytical school of philosophy, logical positivism and nominalism, parallels between thinking about logic and the formalist school in the philosophy of mathematics, the history of modern logic, Wittgenstein’s Tractatus, Leśniewski’s protothetic, dialogue logic, and combinatorial logic.
Within the broad objectives of the Surveillance Systems research program, the Man Computer Functions Task is specifically concerned with the allocation of functions and interrelationships among interpreters and computers. The present publication describes an initial study, involving two experiments, in the development of procedures through which a computer can aid in the interpretation -decision process. The experiments were conducted to study the effect of providing payoff instructions based on specific intelligence requirements on image interpreter performance in two important tasks: (1) Location and identification of targets in tactical imagery and (2) Rapid screening of tactical imagery. Three sets of instructions were used in each experiment. One set emphasized importance of completeness of interpretation; another emphasized importance of achieving a balance between accuracy and completeness; the third emphasized accuracy over completeness. Results of both experiments showed that interpreters can vary their performance as a function of the relative weight given accuracy and completeness of output. Positive results obtained in both experiments point up the need for provision of guidance to interpreters to offset highly variable and subjective evaluations given intelligence requirements. Development of payoff matrices for classes of military situations is suggested. (Author).
This monograph presents necessary and sufficient conditions for completeness of the linear span of eigenvectors and generalized eigenvectors of operators that admit a characteristic matrix function in a Banach space setting. Classical conditions for completeness based on the theory of entire functions are further developed for this specific class of operators. The classes of bounded operators that are investigated include trace class and Hilbert-Schmidt operators, finite rank perturbations of Volterra operators, infinite Leslie operators, discrete semi-separable operators, integral operators with semi-separable kernels, and period maps corresponding to delay differential equations. The classes of unbounded operators that are investigated appear in a natural way in the study of infinite dimensional dynamical systems such as mixed type functional differential equations, age-dependent population dynamics, and in the analysis of the Markov semigroup connected to the recently introduced zig-zag process.
The increasing amount of structured data available on the Web is laying the foundations for a global-scale knowledge base. But the ever increasing amount of Semantic Web data gives rise to the question – how complete is that data? Though data on the Semantic Web is generally incomplete, some may indeed be complete. In this book, the author deals with how to manage and consume completeness information about Semantic Web data. In particular, the book explores how completeness information can guarantee the completeness of query answering. Optimization techniques for completeness reasoning and the conducting of experimental evaluations are provided to show the feasibility of the approaches, as well as a technique for checking the soundness of queries with negation via reduction to query completeness checking. Other topics covered include completeness information with timestamps, and two demonstrators – CORNER and COOL-WD – are provided to show how a completeness framework can be realized. Finally, the book investigates an automated method to generate completeness statements from text on the Web. The book will be of interest to anyone whose work involves dealing with Web-data completeness.
Earlier in this century, many philosophers of science (for example, Rudolf Carnap) drew a fairly sharp distinction between theory and observation, between theoretical terms like 'mass' and 'electron', and observation terms like 'measures three meters in length' and 'is _2° Celsius'. By simply looking at our instruments we can ascertain what numbers our measurements yield. Creatures like mass are different: we determine mass by calculation; we never directly observe a mass. Nor an electron: this term is introduced in order to explain what we observe. This (once standard) distinction between theory and observation was eventually found to be wanting. First, if the distinction holds, it is difficult to see what can characterize the relationship between theory :md observation. How can theoretical terms explain that which is itself in no way theorized? The second point leads out of the first: are not the instruments that provide us with observational material themselves creatures of theory? Is it really possible to have an observation language that is entirely barren of theory? The theory-Iadenness of observation languages is now an accept ed feature of the logic of science. Many regard such dependence of observation on theory as a virtue. If our instruments of observation do not derive their meaning from theories, whence comes that meaning? Surely - in science - we have nothing else but theories to tell us what to try to observe.
The focus of this book is the P versus NP Question and the theory of NP-completeness. It also provides adequate preliminaries regarding computational problems and computational models. The P versus NP Question asks whether or not finding solutions is harder than checking the correctness of solutions. An alternative formulation asks whether or not discovering proofs is harder than verifying their correctness. It is widely believed that the answer to these equivalent formulations is positive, and this is captured by saying that P is different from NP. Although the P versus NP Question remains unresolved, the theory of NP-completeness offers evidence for the intractability of specific problems in NP by showing that they are universal for the entire class. Amazingly enough, NP-complete problems exist, and furthermore hundreds of natural computational problems arising in many different areas of mathematics and science are NP-complete.
Boolean algebras have historically played a special role in the development of the theory of general or "universal" algebraic systems, providing important links between algebra and analysis, set theory, mathematical logic, and computer science. It is not surprising then that focusing on specific properties of Boolean algebras has lead to new direct
The precise mathematical investigation of various natural phenomena is an old and difficult problem. This book is the first to deal systematically with the general non-selfadjoint problems in mechanics and physics. It deals mainly with bounded domains with smooth boundaries, but also considers elliptic boundary value problems in tube domains, i.e. in non-smooth domains. This volume will be of particular value to those working in differential equations, functional analysis, and equations of mathematical physics.
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