Results 31 to 40 of about 56,268 (229)

Nonnegative signed total Roman domination in graphs

Communications in Combinatorics and Optimization, 2020
Let $G$ be a finite and simple graph with vertex set $V(G)$. A nonnegative signed total Roman dominating function (NNSTRDF) on a graph $G$ is a function $f:V(G)\rightarrow\{-1, 1, 2\}$ satisfying the conditions that (i) $\sum_{x\in N(v)}f(x)\ge 0$ for
Nasrin Dehgardi, Lutz Volkmann
doaj   +1 more source

Total Roman Domination Number of Rooted Product Graphs

Mathematics, 2020
Let G be a graph with no isolated vertex and f:V(G)→{0,1,2} a function. If f satisfies that every vertex in the set {v∈V(G):f(v)=0} is adjacent to at least one vertex in the set {v∈V(G):f(v)=2}, and if the subgraph induced by the set {v∈V(G):f(v)≥1} has ...
Abel Cabrera Martínez, Suitberto Cabrera García, Andrés Carrión García, Frank A. Hernández Mira   +3 more
doaj   +1 more source

Signed Total Roman Domination in Digraphs

Discussiones Mathematicae Graph Theory, 2017
Let D be a finite and simple digraph with vertex set V (D). A signed total Roman dominating function (STRDF) on a digraph D is a function f : V (D) → {−1, 1, 2} satisfying the conditions that (i) ∑x∈N−(v)f(x) ≥ 1 for each v ∈ V (D), where N−(v) consists ...
Volkmann Lutz
doaj   +1 more source

On the weak Roman domination number of lexicographic product graphs

, 2018
A vertex $v$ of a graph $G=(V,E)$ is said to be undefended with respect to a function $f: V \longrightarrow \{0,1,2\}$ if $f(v)=0$ and $f(u)=0$ for every vertex $u$ adjacent to $v$.
Pérez-Rosés, Hebert, Rodríguez-Velázquez, Juan A., Valveny, Magdalena   +2 more
core   +1 more source

Further Results on the Total Roman Domination in Graphs

Mathematics, 2020
Let G be a graph without isolated vertices. A function f : V ( G ) → { 0 , 1 , 2 } is a total Roman dominating function on G if every vertex v ∈ V ( G ) for which f ( v ) = 0 is adjacent to at least one vertex u ...
Abel Cabrera Martínez, Suitberto Cabrera García, Andrés Carrión García   +2 more
doaj   +1 more source

Circularly Polarized Luminescent and Melt‐Processable Copper(I)‐Organic Glasses Based on 2,2′‐Bis(diphenylphosphino)‐1,1′‐binaphthyl

Angewandte Chemie, EarlyView.
Homochiral Cu(I) cyanide complexes based on 2,2’‐bis(diphenylphosphino)‐1,1’‐binaphthyl (BINAP) form melt‐quenched and desolvation‐derived metal–organic glasses that exhibit circularly polarized thermally activated delayed fluorescence (TADF) at room temperature, enabling processable chiroptical materials.
Zeyu Fan, Indranil Sen, Roman Pallach, Guo‐Qiang Li, Andreas Steffen, Sebastian Henke   +5 more
wiley   +2 more sources

Signed total Roman $k$-domination in directed graphs

Communications in Combinatorics and Optimization, 2016
Let $D$ be a finite and simple digraph with vertex set $V(D)$‎. ‎A signed total Roman $k$-dominating function (STR$k$DF) on‎ ‎$D$ is a function $f:V(D)\rightarrow\{-1‎, ‎1‎, ‎2\}$ satisfying the conditions‎ ‎that (i) $\sum_{x\in N^{-}(v)}f(x)\ge k ...
N. Dehgard, L. Volkmann
doaj   +1 more source

Zmiany struktury użytkowania ziemi w gospodarstwach rolnych województwa kujawsko-pomorskiego w świetle wyników spisów powszechnych rolnictwa z lat 2002 i 2010 [PDF]

, 2014
The study presents the results of the spatial analysis of the total area of agricultural holdings as of 2010 and the changes in these figures as recorded in 2002 and 2010, whereby the agricultural acreage (including: arable lands, permanent crops and ...
Dubownik, Anna, Rudnicki, Roman
core   +2 more sources

Double Spin Asymmetries A_NN and A_SS at sqrt{s}=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC [PDF]

, 2006
We present the first measurements of the double spin asymmetries A_NN and A_SS at sqrt{s}=200 GeV, obtained by the pp2pp experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC).
Alekseev, I. G., Bogdanov, A. A., Bultmann, S., Chiang, I. H., Chrien, R. E., Chwastowski, J., De, K., Drees, A., Gill, R. L., Guler, N., Guryn, W., Haguenauer, M., Kanavets, V. P., Khodinov, A., Koroleva, L. I., Landgraf, J., Li, J., Ljubicic, T. A., Lynn, D., Morozov, B. V., Nurushev, S. B., Ozturk, N., Pawlik, B., Pearson, C., Pile, P., pp2pp Collaboration, Rijssenbeek, M., Runtzo, M. F., Rusek, A., Sakitt, M., Sandacz, A., Strikhanov, M. N., Svirida, D. N., Tepikian, S., Whitehead, L., Yeung, S., Yip, K.   +36 more
core   +4 more sources

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source