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Wyszukujesz frazę "Marciszewski, Witold" wg kryterium: Autor


Tytuł:
Does Science Progress Towards Ever Higher Solvability Through Feedbacks Between Insights and Routines?
Autorzy:
Marciszewski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/561316.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Semiotyczne
Tematy:
Algorithm
arithmetic
axiom
axiomatic formalized theory
concept
decidability
feedback
insight (intuition)
mathematics
mechanism
mentalism
oracle
problem
problem-solving
progress
routine procedure
science
solvability
Opis:
The affirmative answer to the title question is justified in two ways: logical and empirical. (1) The logical justification is due to Gödel’s discovery (1931) that in any axiomatic formalized theory, having at least the expressive power of PA (Peano Arithmetic), at any stage of development there must appear unsolvable problems. However, some of them become solvable in a further development of the theory in question, owing to subsequent investigations. These lead to new concepts, expressed with additional axioms or rules. Owing to the so-amplified axiomatic basis, new routine procedures like algorithms, can be reached. Those, in turn, help to gain new insights which lead to still more powerful axioms, and consequently again to ampler algorithmic resources. Thus scientific progress proceeds to an ever higher scope of solvability. (2) The existence of such feedback cycles – in a formal way rendered with Turing’s systems of logic based on ordinal (1939) – gets empirically supported by the history of mathematics and other exact sciences. An instructive instance of such a process is found in the history of the number zero. Without that insight due to some ancient Hindu mathematicians there could not arise such an axiomatic theory as PA. It defines the algorithms of arithmetical operations, which in turn help intuitions; those, in turn, give rise to algorithmic routines, not available in any of the previous phases of the process in question. While the logical substantiation of the point of this essay is a well-established result of logico-semantic inquiries, its empirical claim, based on historical evidences, remains open for discussion. Hence the author’s intention to address philosophers and historians of science, and to encourage their critical responses.
Źródło:
Studia Semiotyczne; 2018, 32, 2; 153-185
0137-6608
Pojawia się w:
Studia Semiotyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kazimierz Ajdukiewicz i polski spór o uniwersalia
Kazimierz Ajdukiewicz and the Polish Debate on Universals
Autorzy:
Marciszewski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/963622.pdf
Data publikacji:
1999-09-01
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Opis:
When discussing Kazimierz Ajdukiewicz's role in philosophy, it is worthwhile recalling his participation in scholarly controversies. It was characteristic of his open mind that his taking part in debates was motivated by a vivid interest in various ways of thinking. Ajdukiewicz's intellectual power consisted, so to speak, in his ability of not to understand. This ability has brought him success in some important debates, concerning i.a. the classical logical concept of contradiction and the debate on universals raised in modern Poland with the nominalistic program of Stanislaw Lesniewski and Tadeusz Kotarbiński. In this latter debate Ajdukiewicz shows that when one says that individuals exist, the word „exist" refers to something different that in the statement that universals exist. In other words, the functor „is" has a different category in the definition of an individual from that appearing in the definition of a universal; hence there must be two different senses of the word „exist".
Źródło:
Filozofia Nauki; 1999, 7, 3-4; 5-13
1230-6894
2657-5868
Pojawia się w:
Filozofia Nauki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On sequential convergence in weakly compact subsets of Banach spaces
Autorzy:
Marciszewski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/1289924.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Banach space
weakly compact set
uniform Eberlein compact space
bisequential space
Opis:
We construct an example of a Banach space E such that every weakly compact subset of E is bisequential and E contains a weakly compact subset which cannot be embedded in a Hilbert space equipped with the weak topology. This answers a question of Nyikos.
Źródło:
Studia Mathematica; 1994-1995, 112, 2; 189-194
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A function space Cp(X) not linearly homeomorphic to Cp(X) × ℝ
Autorzy:
Marciszewski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/1205429.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
function space
pointwise convergence topology
$c_p(X)$
linear homeomorphism
Opis:
We construct two examples of infinite spaces X such that there is no continuous linear surjection from the space of continuous functions $c_p(X)$ onto $c_p(X)$ × ℝ$. In particular, $c_p(X)$ is not linearly homeomorphic to $c_p(X)$ × ℝ$. One of these examples is compact. This answers some questions of Arkhangel'skiĭ.
Źródło:
Fundamenta Mathematicae; 1997, 153, 2; 125-40
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nierozstrzygalność i algorytmiczna niedostępność w naukach społecznych
Undecidability and Algorithmic Intractability in Social Sciences
Autorzy:
Marciszewski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/968830.pdf
Data publikacji:
2004-09-01
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Opis:
The paper is meant as a survey of issues in computational complexity from the standpoint of its relevance to social research. Moreover, the threads are hinted at that lead to computer science from mathematical logic and from philosophical questions about the limits and the power both of mathematics and the human mind. Especially, the paper addresses Turing's idea of oracle, considering its impact on computational (i.e., relying on simulations) economy, sociology etc. Oracle is meant as a device capable of finding the values of uncomputable functions. Such an idealized entity is exemplified by the human mind's procedure of recognizing the truth of the Gödelian sentence, of identifying uncomputable numbers through Turing's diagonal procedure, etc. Since such procedures are strictly defined and are as reliable as any calculations, they are worth to be called computation as well. From the computation in the strict sense, that defined as purely algorithmic (mechanical) process, one distinguishes them with the term "hipercomputation". Now the following questions arise. - Are there undecidable problems (ie. not decidable with appropriate algorithms) in social research as are (according to what is reported esp. By S. Wolfram) in natural sciences? The answer in the negative would impose limitations on computer simulations (as entirely relying on algorithms). - If there are, then we have the next question: can such problems be addressed with hipercomputational procedures? - How such hipercomputational procedures would be related to analog computation (coextensive, everlappiing, etc.)? Another set of issues is stated in terms of tractability of decidable problems, that is, the efficiency of algorithms needed for solutions. As inefficient are regarded those which require more resources (time, memory, etc.) than is available in a foreseeable future. In this context, one discusses methods of such an efficient organizing computational processes to overcome the scarcity of resources; thus parallel, distributive, interactive, etc. computing are used as remedies. The paper claims, hinting at F.Hayek's ideas, that in some social systems (e.g., stock exchange, and free market in general) such an efficient organization of their computational activities spontaneously evolves. And this is the main source of its advantages over the central economic planning (as defended by O. Lange). This noticing (in terms of complexity theory) of analogy between Hayek's point and the current discussion of efficiency of algorithms is what may count as an original contribution of the present paper.
Źródło:
Filozofia Nauki; 2004, 12, 3-4; 5-31
1230-6894
2657-5868
Pojawia się w:
Filozofia Nauki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formalizm syntaktyczny Jana Łukasiewicza jako model inteligentnego działania
Lukasiewiczs Syntactical Formalism as a Model for Intelligent Action
Autorzy:
Marciszewski, Witold
Powiązania:
https://bibliotekanauki.pl/articles/965025.pdf
Data publikacji:
1997-09-01
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Źródło:
Filozofia Nauki; 1997, 5, 3; 89-100
1230-6894
2657-5868
Pojawia się w:
Filozofia Nauki
Dostawca treści:
Biblioteka Nauki
Artykuł

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