Bounded projections in weighted function spaces in a generalized unit disc

A. H. Karapetyan

Displaying similar documents to “Bounded projections in weighted function spaces in a generalized unit disc”

About the decision of reachability for register machines

Véronique Cortier (2002)

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications

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We study the decidability of the following problem: given $p$ affine functions $f_{1}, ..., f_{p}$ over $ℕ^{k}$ and two vectors $v_{1}, v_{2} \in ℕ^{k}$ , is $v_{2}$ reachable from $v_{1}$ by successive iterations of $f_{1}, ..., f_{p}$ (in this given order)? We show that this question is decidable for $p = 1, 2$ and undecidable for some fixed $p$ .

On powers of Lindelöf spaces

Isaac Gorelic (1994)

Commentationes Mathematicae Universitatis Carolinae

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We present a forcing construction of a Hausdorff zero-dimensional Lindelöf space $X$ whose square $X^{2}$ is again Lindelöf but its cube $X^{3}$ has a closed discrete subspace of size $𝔠^{+}$ , hence the Lindelöf degree $L (X^{3}) = 𝔠^{+}$ . In our model the Continuum Hypothesis holds true. After that we give a description of a forcing notion to get a space $X$ such that $L (X^{n}) = ℵ_{0}$ for all positive integers $n$ , but $L (X^{ℵ_{0}}) = 𝔠^{+} = ℵ_{2}$ .

Addition of initial segments. II.

Antonín Sochor (1988)

Commentationes Mathematicae Universitatis Carolinae

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More on the Fibonacci sequence and Hessenberg matrices.

Esmaeili, Morteza (2006)

Integers

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Diophantine quadruples for squares of Fibonacci and Lucas numbers.

Dujella, Andrej (1995)

Portugaliae Mathematica

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