A. Jo'o

activity

20242026

collaborators

7 papers

math.CO2026

Well-order a flame

Zsuzsanna Jankó, Attila Joó

An $r$ -rooted (possibly infinite) digraph $D = (V, E)$ is a flame if for every $v \in V ∖ {r}$ there exists a set of edge-disjoint paths from $r$ to $v$ in $D$ that cove…

math.CO2025

Large flames in rooted acyclic digraphs without backward-infinite paths

Attila Joó, Qiuzhenyu Tao

An $r$ -rooted digraph is a flame if for each non-root vertex $v$ , there is a set of edge-disjoint directed paths from $r$ to $v$ that covers all ingoing edges of $v$ . The study of…

astro-ph.SR2025

Time-resolved protoplanetary disk physics in DQ Tau with JWST

Á. Kóspál, P. Ábrahám, V. V. Akimkin +17

Accretion variability is ubiquitous in YSOs. While large outbursts may strongly affect the disk, the effects of moderate bursts are less understood. We aim to study the physical re…

math.CO2025

A structure theorem for rooted connectivity in bidirected graphs

Tara Abrishami, Nathan Bowler, Attila Joó +2

Recently, bidirected graphs have received increasing attention from the graph theory community with both structural and algorithmic results. Bidirected graphs are a generalization…

math.CO2025

Wild generalised truncation of infinite matroids

J. Pascal Gollin, Attila Joó

For $n \in N$ , the $n$ -truncation of a matroid $M$ of rank at least $n$ is the matroid whose bases are the $n$ -element independent sets of $M$ . One can extend this defin…

math.CO2025

Hindrance from a wasteful common independent set

Attila Joó

For (potentially infinite) matroids $M$ and $N$ , an $(M, N)$ -hindrance is a set $H$ that is independent but not spanning in $N . span_{M} (H)$ . This concept was introdu…