V. Fischer

activity

20092022

most citedNon-linear iterations and higher splitting

1 citations · 1 across the 8 of their papers we have counts for

collaborators

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13 papers · 1 filter

math.LO2022

Games on base matrices

Vera Fischer, Marlene Koelbing, Wolfgang Wohofsky

Using a game characterization of distributivity, we show that base matrices for $P (ω) / fin$ of regular height larger than $h$ necessarily have maximal br…

math.LO2022

On heights of distributivity matrices

Vera Fischer, Marlene Koelbing, Wolfgang Wohofsky

We construct a model in which there exists a distributivity matrix of regular height $λ$ larger than $h$ ; both $λ = c$ and $λ < c$ are possible. A di…

math.LO2021

Strong independence and its spectrum

Monroe Eskew, Vera Fischer

For $μ, κ$ infinite, say $A \subseteq [κ]^{κ}$ is a $(μ, κ)$ -maximal independent family if whenever $A_{0}$ and $A_{1}$ are pairwise disjoint non-empty in $[\…

math.LO2020★ 1 cited

Non-linear iterations and higher splitting

Ömer Faruk Bağ, Vera Fischer

We show that generalized eventually narrow sequences on a strongly inaccessible cardinal $κ$ are preserved under the Cummings-Shaleh non-linear iterations of the higher Hechler for…

math.LO2020

Parallel non-linear iterations

Ömer Faruk Bağ, Vera Fischer

Developing a system of parallel non-linear iterations, we establish the consistency of $b < s < d < c$ where $\mathfrak{b}, \mathfrak{d}, \mat…

math.LO2019

Selective independence

Vera Fischer

Let $i$ denote the minimal cardinality of a maximal independent family and let $a_{T}$ denote the minimal cardinality of a maximal family of pairwise almost dis…