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Wyszukujesz frazę "commutative" wg kryterium: Temat


Tytuł:
The super complex Frobenius theorem
Autorzy:
Hill, C.
Simanca, Santiago
Powiązania:
https://bibliotekanauki.pl/articles/1312554.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
graded-commutative algebras
supermanifolds
Levi flat super CR structure
locally direct sheaf
super real integrable distribution
super complex Frobenius structure
nilpotent element
derivations
Opis:
We formulate and prove a super analogue of the complex Frobenius theorem of Nirenberg.
Źródło:
Annales Polonici Mathematici; 1991, 55, 1; 139-155
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A remark on non-existence of an algebra norm for the algebra of continuous functions on a topological space admitting an unbounded continuous function
Autorzy:
Pruss, Alexander R.
Powiązania:
https://bibliotekanauki.pl/articles/1288753.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
algebra of all continuous functions
normed commutative algebra
non-existence of norm
topological spaces admitting unbounded functions
Opis:
Let X be any topological space, and let C(X) be the algebra of all continuous complex-valued functions on X. We prove a conjecture of Yood (1994) to the effect that if there exists an unbounded element of C(X) then C(X) cannot be made into a normed algebra.
Źródło:
Studia Mathematica; 1995, 116, 3; 295-297
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The closed Friedman world model with the initial and final singularities as a non-commutative space
Autorzy:
Heller, Michael
Sasin, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/1342663.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
singularities
Friedman cosmology
non-commutative geometry
Opis:
The most elegant definition of singularities in general relativity as b-boundary points, when applied to the closed Friedman world model, leads to the disastrous situation: both the initial and final singularities form the single point of the b-boundary which is not Hausdorff separated from the rest of space-time. We apply Alain Connes' method of non-commutative geometry, defined in terms of a C*-algebra, to this case. It turns out that both the initial and final singularities can be analysed as representations of the C*-algebra in a Hilbert space. The method does not distinguish points in space-time, but identifies space slices of the closed Friedman model as states of the corresponding C*-algebra.
Źródło:
Banach Center Publications; 1997, 41, 1; 153-161
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An extension of Millers version of the de Rham Theorem with any coefficients
Autorzy:
Garvín, Antonio
Lechuga, Luis
Murillo, Aniceto
Muñoz, Vicente
Viruel, Antonio
Powiązania:
https://bibliotekanauki.pl/articles/1341823.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
commutative cochain problem
de Rham theorem
simplicial set
Opis:
In this paper we present an approximation to the de Rham theorem for simplicial sets with any coefficients based, using simplicial techniques, on Poincaré's lemma and q-extendability.
Źródło:
Banach Center Publications; 1998, 45, 1; 169-176
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infinite independent systems of identities of alternative commutative algebra over a field of characteristic three
Autorzy:
Sandu, Nicolae
Powiązania:
https://bibliotekanauki.pl/articles/728912.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
nfinite independent system of identities
alternative commutative algebra
solvable algebra
commutative Moufang loop
Opis:
Let ₃ denote the variety of alternative commutative (Jordan) algebras defined by the identity x³ = 0, and let ₂ be the subvariety of the variety ₃ of solvable algebras of solviability index 2. We present an infinite independent system of identities in the variety ₃ ∩ ₂₂. Therefore we infer that ₃ ∩ ₂₂ contains a continuum of infinite based subvarieties and that there exist algebras with an unsolvable words problem in ₃ ∩ ₂₂.
It is worth mentioning that these results were announced in 1999 in works of the international conference "Loops’99" (Prague).
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2004, 24, 1; 5-30
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANOVA using commutative Jordan algebras, an application
Autorzy:
Rodrigues, Paulo
Mexia, João
Powiązania:
https://bibliotekanauki.pl/articles/729984.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
commutative Jordan algebras
variance components
orthogonal models
ANOVA
Opis:
Binary operations on commutative Jordan algebras are used to carry out the ANOVA of a two layer model. The treatments in the first layer nests those in the second layer, that being a sub-model for each treatment in the first layer. We present an application with data retried from agricultural experiments.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2006, 26, 2; 179-191
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foldness of Commutative Ideals in BCK-algebras
Autorzy:
Lele, Celestin
Moutari, Salissou
Powiązania:
https://bibliotekanauki.pl/articles/729177.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
BCK-algebra
fuzzy point
n-fold commutative ideals
n-fold weak commutative ideals
Opis:
This paper deals with some properties of n-fold commutative ideals and n-fold weak commutative ideals in BCK-algebras. Afterwards, we construct some algorithms for studying foldness theory of commutative ideals in BCK-algebras.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2006, 26, 1; 111-135
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Commutative directoids with sectional involutions
Autorzy:
Chajda, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/729147.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
commutative directoid
sectional involution
sectional complement
d-implication algebra
NMV-algebra
Opis:
The concept of a commutative directoid was introduced by J. Ježek and R. Quackenbush in 1990. We complete this algebra with involutions in its sections and show that it can be converted into a certain implication algebra. Asking several additional conditions, we show whether this directoid is sectionally complemented or whether the section is an NMV-algebra.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2007, 27, 1; 49-58
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inference for random effects in prime basis factorials using commutative Jordan algebras
Autorzy:
Jesus, Vera
Rodrigues, Paulo
Mexia, João
Powiązania:
https://bibliotekanauki.pl/articles/730010.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
prime basis factorial
commutative Jordan algebras
complete sufficient statistics
UMVUE
confidence regions
Opis:
Commutative Jordan algebras are used to drive an highly tractable framework for balanced factorial designs with a prime number p of levels for their factors. Both fixed effects and random effects models are treated. Sufficient complete statistics are obtained and used to derive UMVUE for the relevant parameters. Confidence regions are obtained and it is shown how to use duality for hypothesis testing.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2007, 27, 1-2; 15-25
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joint estimation for normal orthogonal mixed models
Autorzy:
de Jesus, Vera
Ferreira, Sandra
Mexia, João
Powiązania:
https://bibliotekanauki.pl/articles/730008.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
normal orthogonal mixed models
commutative Jordan algebras
meta-analysis
Opis:
Commutative Jordan algebras are used to express the structure of mixed orthogonal models and to derive complete sufficient statistics. From these statistics, UMVUE, (Uniformly Minimum Variance Unbiased Estimators), are derived for the relevant parameters, first of single models then of several such models. These models may correspond to experiments designed separately so our results may be seen as a contribution to this meta-analysis.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2007, 27, 1-2; 5-13
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear model genealogical tree application to an odontology experiment
Autorzy:
Covas, Ricardo
Powiązania:
https://bibliotekanauki.pl/articles/729994.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
commutative Jordan algebra
binary operations
Kronecker matrix product
lattice
projectors
Opis:
Commutative Jordan algebras play a central part in orthogonal models. We apply the concepts of genealogical tree of an Jordan algebra associated to a linear mixed model in an experiment conducted to study optimal choosing of dentist materials. Apart from the conclusions of the experiment itself, we show how to proceed in order to take advantage of the great possibilities that Jordan algebras and mixed linear models give to practitioners.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2007, 27, 1-2; 47-77
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Canonic inference and commutative orthogonal block structure
Autorzy:
Carvalho, Francisco
Mexia, João
Oliveira, M.
Powiązania:
https://bibliotekanauki.pl/articles/729946.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
COBS
canonical inference
commutative Jordan algebras
Opis:
It is shown how to define the canonic formulation for orthogonal models associated to commutative Jordan algebras. This canonic formulation is then used to carry out inference. The case of models with commutative orthogonal block structures is stressed out.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2008, 28, 2; 171-181
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fourier-like methods for equations with separable variables
Autorzy:
Przeworska-Rolewicz, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/729392.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
algebraic analysis
commutative algebra with unit
Leibniz condition
logarithmic mapping
antilogarithmic mapping
right invertible operator
sine mapping
cosine mapping
initial value problem
boundary value problem
Fourier method
Opis:
It is well known that a power of a right invertible operator is again right invertible, as well as a polynomial in a right invertible operator under appropriate assumptions. However, a linear combination of right invertible operators (in particular, their sum and/or difference) in general is not right invertible. It will be shown how to solve equations with linear combinations of right invertible operators in commutative algebras using properties of logarithmic and antilogarithmic mappings. The used method is, in a sense, a kind of the variables separation method. We shall obtain also an analogue of the classical Fourier method for partial differential equations. Note that the results concerning the Fourier method are proved under weaker assumptions than these obtained in [6] (cf. also [7, 8, 11]).
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2009, 29, 1; 19-42
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algebraic structureof step nesting designs
Autorzy:
Fernandes, Célia
Ramos, Paulo
Mexia, João
Powiązania:
https://bibliotekanauki.pl/articles/729913.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
commutative Jordan algebras
cartesian product of commutative Jordan algebras
step nesting
variance components
UMVUE
Opis:
Step nesting designs may be very useful since they require fewer observations than the usual balanced nesting models. The number of treatments in balanced nesting design is the product of the number of levels in each factor. This number may be too large. As an alternative, in step nesting designs the number of treatments is the sum of the factor levels. Thus these models lead to a great economy and it is easy to carry out inference. To study the algebraic structure of step nesting designs we introduce the cartesian product of commutative Jordan algebras.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2010, 30, 2; 221-235
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On monadic quantale algebras: basic properties and representation theorems
Autorzy:
Solovyov, Sergey
Powiązania:
https://bibliotekanauki.pl/articles/729061.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
m-semilattice
⋁-lattice
quantale
quantale module
topological system
tropological system
quantale algebra
quantaloid
quantale algebroid
quantifier
monadic quantale algebra
Girard quantale
Q-equivalence relation
Ω-valued set
GL-monoid
commutative integral cl-monoid
Opis:
Motivated by the concept of quantifier (in the sense of P. Halmos) on different algebraic structures (Boolean algebras, Heyting algebras, MV-algebras, orthomodular lattices, bounded distributive lattices) and the resulting notion of monadic algebra, the paper introduces the concept of a monadic quantale algebra, considers its properties and provides several representation theorems for the new structures.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2010, 30, 1; 91-118
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł

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