Temat: First Sets - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An analysis of the concurrent calculation of the First Sets
Autorzy:: Jeruszka, P.
Powiązania:: https://bibliotekanauki.pl/articles/122760.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: First Sets
concurrent computing
construction of languages
parsing
zbiory pierwsze
programowanie współbieżne
analiza składniowa
Opis:: This paper is focused on the process of computing First Sets. The First Sets are used to build structures which control a syntax analyser (also known as parser). Three methods of creating First Sets were compared in terms of execution time. The first method is known sequential algorithm and the author’s own methods are concurrent computing sets for each non-terminal symbol (called the CEN method) and concurrent computing sets for each production (called the CEP method). These methods have been tested on personal computer. Three programming languages (including the C language) were used in the research. The results and the analysis of calculations allow the author to hypothesise that the problem of computing First Sets is hard to concurrence.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 3; 67-74
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Category theorems concerning Z-density continuous functions
Autorzy:: Ciesielski, K.
Larson, L.
Powiązania:: https://bibliotekanauki.pl/articles/1215085.pdf
Data publikacji:: 1991
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: ℑ-density topology
ℑ-density continuous functions
first category sets
Opis:: The ℑ-density topology $T_ℑ$ on ℝ is a refinement of the natural topology. It is a category analogue of the density topology [9, 10]. This paper is concerned with ℑ-density continuous functions, i.e., the real functions that are continuous when the ℑ-density} topology is used on the domain and the range. It is shown that the family $C_ℑ$ of ordinary continuous functions f: [0,1]→ℝ which have at least one point of ℑ-density continuity is a first category subset of C([0,1])= {f: [0,1]→ℝ: f is continuous} equipped with the uniform norm. It is also proved that the class $C_ℑℑ$ of ℑ-density continuous functions, equipped with the topology of uniform convergence, is of first category in itself. These results remain true when the ℑ-density topology is replaced by the deep ℑ-density topology.
Źródło:: Fundamenta Mathematicae; 1991-1992, 140, 1; 79-85
0016-2736
Pojawia się w:: Fundamenta Mathematicae
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: On open maps of Borel sets
Autorzy:: Ostrovsky, A.
Powiązania:: https://bibliotekanauki.pl/articles/1208391.pdf
Data publikacji:: 1995
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: open maps
Borel sets
analytic sets
space of the first category
space of the second category
Baire space
Opis:: We answer in the affirmative [Th. 3 or Corollary 1] the question of L. V. Keldysh [5, p. 648]: can every Borel set X lying in the space of irrational numbers ℙ not $G_δ · F_σ$ and of the second category in itself be mapped onto an arbitrary analytic set Y ⊂ ℙ of the second category in itself by an open map? Note that under a space of the second category in itself Keldysh understood a Baire space. The answer to the question as stated is negative if X is Baire but Y is not Baire.
Źródło:: Fundamenta Mathematicae; 1994-1995, 146, 3; 203-213
0016-2736
Pojawia się w:: Fundamenta Mathematicae
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja