Zobrazeno 1 - 10
of 835
pro vyhledávání: '"Morris, Patrick A."'
Autor:
Anastos, Michael, Morris, Patrick
In an $n \times n$ array filled with symbols, a transversal is a collection of entries with distinct rows, columns and symbols. In this note we show that if no symbol appears more than $\beta n$ times, the array contains a transversal of size $(1-\be
Externí odkaz:
http://arxiv.org/abs/2412.05891
The celebrated canonical Ramsey theorem of Erd\H{o}s and Rado implies that for $2\leq k\in \mathbb{N}$, any colouring of the edges of $K_n$ with $n$ sufficiently large gives a copy of $C_{2k}$ which has one of three canonical colour patterns: monochr
Externí odkaz:
http://arxiv.org/abs/2411.14566
For a graph $H$ and an $n$-vertex graph $G$, the $H$-bootstrap process on $G$ is the process which starts with $G$ and, at every time step, adds any missing edges on the vertices of $G$ that complete a copy of $H$. This process eventually stabilises
Externí odkaz:
http://arxiv.org/abs/2311.18786
Let $\mathbf{G}=\{G_1, \ldots, G_m\}$ be a graph collection on a common vertex set $V$ of size $n$ such that $\delta(G_i) \geq (1+o(1))n/2$ for every $i \in [m]$. We show that $\mathbf{G}$ contains every Hamilton cycle pattern. That is, for every map
Externí odkaz:
http://arxiv.org/abs/2310.04138
Given a fixed graph $H$ and an $n$-vertex graph $G$, the $H$-bootstrap percolation process on $G$ is defined to be the sequence of graphs $G_i$, $i\geq 0$ which starts with $G_0:=G$ and in which $G_{i+1}$ is obtained from $G_i$ by adding every edge t
Externí odkaz:
http://arxiv.org/abs/2308.00498
Autor:
Gull, Theodore R., Hartman, Henrik, Teodoro, Mairan, Hillier, D. John, Corcoran, Michael F., Damineli, Augusto, Hamaguchi, Kenji, Madura, Thomas, Moffat, Anthony F. J., Morris, Patrick, Richardson, Noel D., Stevens, Ian R., Weigelt, Gerd
Previous STIS long-slit observations of Eta Carinae identified numerous absorption features in both the stellar spectrum, and in the adjacent nebular spectra, along our line-of-sight. The absorption features became temporarily stronger when the ioniz
Externí odkaz:
http://arxiv.org/abs/2305.13216
Motivated by the investigation of sharpness of thresholds for Ramsey properties in random graphs, Friedgut, Kohayakawa, R\"odl, Ruci\'nski and Tetali introduced two variants of a single-player game whose goal is to colour the edges of a~random graph,
Externí odkaz:
http://arxiv.org/abs/2305.02725
The celebrated canonical Ramsey theorem of Erd\H{o}s and Rado implies that for a given graph $H$, if $n$ is sufficiently large then any colouring of the edges of $K_n$ gives rise to copies of $H$ that exhibit certain colour patterns, namely monochrom
Externí odkaz:
http://arxiv.org/abs/2304.01846
Autor:
Strawn, Emily, Richardson, Noel D., Moffat, Anthony F. J., Ibrahim, Nour, Lane, Alexis, Pickett, Connor, Chené, André-Nicolas, Corcoran, Michael F., Damineli, Augusto, Gull, Theodore R., Hillier, D. John, Morris, Patrick, Pablo, Herbert, Thomas, Joshua D., Stevens, Ian R., Teodoro, Mairan, Weigelt, Gerd
The binary eta Carinae is the closest example of a very massive star, which may have formed through a merger during its Great Eruption in the mid-nineteenth century. We aimed to confirm and improve the kinematics using a spectroscopic data set taken
Externí odkaz:
http://arxiv.org/abs/2301.00064
Autor:
Lau, Ryan M., Hankins, Matthew J., Han, Yinuo, Argyriou, Ioannis, Corcoran, Michael F., Eldridge, Jan J., Endo, Izumi, Fox, Ori D., Marin, Macarena Garcia, Gull, Theodore R., Jones, Olivia C., Hamaguchi, Kenji, Lamberts, Astrid, Law, David R., Madura, Thomas, Marchenko, Sergey V., Matsuhara, Hideo, Moffat, Anthony F. J., Morris, Mark R., Morris, Patrick W., Onaka, Takashi, Ressler, Michael E., Richardson, Noel D., Russell, Christopher M. P., Sanchez-Bermudez, Joel, Smith, Nathan, Soulain, Anthony, Stevens, Ian R., Tuthill, Peter, Weigelt, Gerd, Williams, Peredur M., Yamaguchi, Ryodai
Publikováno v:
Lau, R.M., Hankins, M.J., Han, Y. et al. Nested dust shells around the Wolf-Rayet binary WR 140 observed with JWST. Nat Astron (2022)
Massive colliding-wind binaries that host a Wolf-Rayet (WR) star present a potentially important source of dust and chemical enrichment in the interstellar medium (ISM). However, the chemical composition and survival of dust formed from such systems
Externí odkaz:
http://arxiv.org/abs/2210.06452