Search Results - "Rissner, Roswitha"

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  1. 1

    Ramsey numbers of partial order graphs (comparability graphs) and implications in ring theory by Badawi, Ayman, Rissner, Roswitha

    Published in Open mathematics (Warsaw, Poland) (31-12-2020)
    “…For a partially ordered set , let be the simple, undirected graph with vertex set such that two vertices are adjacent if either or . We call the or of …”
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    Journal Article
  2. 2

    Irreducible polynomials in Int(ℤ) by Antoniou, Austin, Nakato, Sarah, Rissner, Roswitha

    Published in ITM web of conferences (2018)
    “…In order to fully understand the factorization behavior of the ring Int(ℤ) = { f ∈ ℚ[x] | f (ℤ) ⊆ ℤ} of integer-valued polynomials on ℤ, it is crucial to…”
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    Journal Article Conference Proceeding
  3. 3

    Absolute irreducibility of the binomial polynomials by Rissner, Roswitha, Windisch, Daniel

    Published in Journal of algebra (15-07-2021)
    “…In this paper we investigate the factorization behaviour of the binomial polynomials (xn)=x(x−1)⋯(x−n+1)n! and their powers in the ring of integer-valued…”
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    Journal Article
  4. 4

    Null ideals of matrices over residue class rings of principal ideal domains by Rissner, Roswitha

    Published in Linear algebra and its applications (01-04-2016)
    “…Given a square matrix A with entries in a commutative ring S, the ideal of S[X] consisting of polynomials f with f(A)=0 is called the null ideal of A. Very…”
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    Journal Article
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    Split absolutely irreducible integer-valued polynomials over discrete valuation domains by Frisch, Sophie, Nakato, Sarah, Rissner, Roswitha

    Published in Journal of algebra (15-07-2022)
    “…Regarding non-unique factorization of integer-valued polynomials over a discrete valuation domain (R,M) with finite residue field, it is known that there exist…”
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    Journal Article
  8. 8

    Characterizing absolutely irreducible integer-valued polynomials over discrete valuation domains by Hiebler, Moritz, Nakato, Sarah, Rissner, Roswitha

    Published in Journal of algebra (01-11-2023)
    “…Rings of integer-valued polynomials are known to be atomic, non-factorial rings furnishing examples for both irreducible elements for which all powers factor…”
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    Journal Article
  9. 9

    Computing J-ideals of a matrix over a principal ideal domain by Heuberger, Clemens, Rissner, Roswitha

    Published in Linear algebra and its applications (15-08-2017)
    “…Given a square matrix B over a principal ideal domain D and an ideal J of D, the J-ideal of B consists of the polynomials f∈D[X] such that all entries of f(B)…”
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    Journal Article
  10. 10

    Bounds on the radius and status of graphs by Rissner, Roswitha, Burkard, Rainer E.

    Published in Networks (01-09-2014)
    “…Two classical concepts of centrality in a graph are the median and the center. The connected notions of the status and the radius of a graph seem to be in no…”
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    Journal Article
  11. 11

    Irreducible integer-valued polynomials with prescribed minimal power that factors non-uniquely by Nakato, Sarah, Rissner, Roswitha

    Published 25-05-2024
    “…We study the question up to which power an irreducible integer-valued polynomial that is not absolutely irreducible can factor uniquely. For example, for…”
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    Journal Article
  12. 12

    Fluctuations in depth and associated primes of powers of ideals by Rissner, Roswitha, Swanson, Irena

    Published 26-09-2023
    “…We count the numbers of associated primes of powers of ideals as defined by Bandari, Hibi, and Herzog in 2014. We generalize those ideals to monomial ideals…”
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    Journal Article
  13. 13

    Finiteness and Skolem Closure of Ideals for Non-Unibranched Domains by Cahen, Paul-Jean, Rissner, Roswitha

    Published in Communications in algebra (03-06-2015)
    “…A one-dimensional, Noetherian, local domain D with maximal ideal and finite residue field was known to be an almost strong Skolem ring if analytically…”
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    Journal Article
  14. 14

    Counting core sets in matrix rings over finite fields by Rissner, Roswitha, Werner, Nicholas J

    Published 07-05-2024
    “…Let $R$ be a commutative ring and $M_n(R)$ be the ring of $n \times n$ matrices with entries from $R$. For each $S \subseteq M_n(R)$, we consider its…”
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    Journal Article
  15. 15

    Absolute irreducibility of the binomial polynomials by Rissner, Roswitha, Windisch, Daniel

    Published 08-02-2022
    “…In this paper we investigate the factorization behaviour of the binomial polynomials $\binom{x}{n} = \frac{x(x-1)\cdots (x-n+1)}{n!}$ and their powers in the…”
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    Journal Article
  16. 16

    Stabilization of associated prime ideals of monomial ideals -- Bounding the copersistence index by Heuberger, Clemens, Rath, Jutta, Rissner, Roswitha

    Published 20-10-2023
    “…The sequence $(\operatorname{Ass}(R/I^n))_{n\in\mathbb{N}}$ of associated primes of powers of a monomial ideal $I$ in a polynomial ring $R$ eventually…”
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    Journal Article
  17. 17

    Characterizing absolutely irreducible integer-valued polynomials over discrete valuation domains by Hiebler, Moritz, Nakato, Sarah, Rissner, Roswitha

    Published 17-07-2023
    “…Rings of integer-valued polynomials are known to be atomic, non-factorial rings furnishing examples for both irreducible elements for which all powers factor…”
    Get full text
    Journal Article
  18. 18

    Polynomially solvable special cases of the quadratic bottleneck assignment problem by Burkard, Rainer E., Rissner, Roswitha

    Published in Journal of combinatorial optimization (01-11-2011)
    “…Quadratic bottleneck assignment problems (QBAP) are obtained by replacing the addition of cost terms in the objective function of a quadratic (sum) assignment…”
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    Journal Article
  19. 19

    Ramsey numbers of partial order graphs (comparability graphs) and implications in ring theory by Badawi, Ayman, Rissner, Roswitha

    Published 17-02-2020
    “…For a partially ordered set $(A, \le)$, let $G_A$ be the simple, undirected graph with vertex set $A$ such that two vertices $a \neq b\in A$ are adjacent if…”
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    Journal Article
  20. 20

    Null ideals of matrices over residue class rings of principal ideal domains by Rissner, Roswitha

    Published 05-01-2016
    “…Linear Algebra and Its Applications (2016), pp. 44-69 Given a square matrix $A$ with entries in a commutative ring $S$, the ideal of $S[X]$ consisting of…”
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    Journal Article