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• # Artykuł - szczegóły

## Formalized Mathematics

2014 | 22 | 1 | 1-10

## Definition of Flat Poset and Existence Theorems for Recursive Call

EN

### Abstrakty

EN
This text includes the definition and basic notions of product of posets, chain-complete and flat posets, flattening operation, and the existence theorems of recursive call using the flattening operator. First part of the article, devoted to product and flat posets has a purely mathematical quality. Definition 3 allows to construct a flat poset from arbitrary non-empty set [12] in order to provide formal apparatus which eanbles to work with recursive calls within the Mizar langauge. To achieve this we extensively use technical Mizar functors like BaseFunc or RecFunc. The remaining part builds the background for information engineering approach for lists, namely recursive call for posets [21].We formalized some facts from Chapter 8 of this book as an introduction to the next two sections where we concentrate on binary product of posets rather than on a more general case.

EN

1-10

### Twórcy

autor
• Neyagawa-shi Osaka, Japan
autor
• Shinshu University Nagano, Japan
autor
• Institute of Informatics University of Białystok Akademicka 2, 15-267 Białystok Poland

### Bibliografia

• [1] Grzegorz Bancerek. Cardinal numbers. Formalized Mathematics, 1(2):377-382, 1990.
• [2] Grzegorz Bancerek. Complete lattices. Formalized Mathematics, 2(5):719-725, 1991.
• [3] Grzegorz Bancerek. The fundamental properties of natural numbers. Formalized Mathematics, 1(1):41-46, 1990.
• [4] Grzegorz Bancerek. The ordinal numbers. Formalized Mathematics, 1(1):91-96, 1990.
• [5] Grzegorz Bancerek. Bounds in posets and relational substructures. Formalized Mathematics, 6(1):81-91, 1997.
• [6] Czesław Bylinski. Functions and their basic properties. Formalized Mathematics, 1(1): 55-65, 1990.
• [7] Czesław Bylinski. Functions from a set to a set. Formalized Mathematics, 1(1):153-164, 1990.
• [8] Czesław Bylinski. Basic functions and operations on functions. Formalized Mathematics, 1(1):245-254, 1990.
• [9] Czesław Bylinski. Partial functions. Formalized Mathematics, 1(2):357-367, 1990.
• [10] Czesław Bylinski. Some basic properties of sets. Formalized Mathematics, 1(1):47-53, 1990.
• [11] Agata Darmochwał. Finite sets. Formalized Mathematics, 1(1):165-167, 1990.
• [12] B.A. Davey and H.A. Priestley. Introduction to Lattices and Order. Cambridge University Press, 2002.
• [13] Marek Dudzicz. Representation theorem for finite distributive lattices. Formalized Mathematics, 9(2):261-264, 2001.
• [14] Adam Grabowski. On the category of posets. Formalized Mathematics, 5(4):501-505, 1996.[WoS]
• [15] Kazuhisa Ishida and Yasunari Shidama. Fixpoint theorem for continuous functions on chain-complete posets. Formalized Mathematics, 18(1):47-51, 2010. doi:10.2478/v10037-010-0006-x.[Crossref]
• [16] Artur Korniłowicz. Cartesian products of relations and relational structures. Formalized Mathematics, 6(1):145-152, 1997.
• [17] Andrzej Trybulec. Domains and their Cartesian products. Formalized Mathematics, 1(1): 115-122, 1990.
• [18] Andrzej Trybulec. Tuples, projections and Cartesian products. Formalized Mathematics, 1(1):97-105, 1990.
• [19] Wojciech A. Trybulec and Grzegorz Bancerek. Kuratowski - Zorn lemma. Formalized Mathematics, 1(2):387-393, 1990.
• [20] Zinaida Trybulec. Properties of subsets. Formalized Mathematics, 1(1):67-71, 1990.
• [21] Glynn Winskel. The Formal Semantics of Programming Languages. The MIT Press, 1993.
• [22] Edmund Woronowicz. Relations and their basic properties. Formalized Mathematics, 1 (1):73-83, 1990.
• [23] Edmund Woronowicz. Relations defined on sets. Formalized Mathematics, 1(1):181-186, 1990.
• [24] Mariusz Zynel and Czesław Bylinski. Properties of relational structures, posets, lattices and maps. Formalized Mathematics, 6(1):123-130, 1997.