Results 151 to 160 of about 856 (188)

Unbalanced social-ecological acceleration led to state formation failure in early medieval Poland. [PDF]

open access: yesProc Natl Acad Sci U S A
Izdebski A   +14 more
europepmc   +1 more source

School Board Elections in England and Wales, 1870–1902: An Electoral Experiment?

open access: yesHistory, EarlyView.
Abstract The 1870 Elementary Education Act enabled the creation of school boards in England and Wales. Members were directly elected by the cumulative vote. This method gave each individual voter as many votes as there were seats on a school board, in some cases up to fifteen.
ED GREEN
wiley   +1 more source

Snapshots from a Fast‐Moving Train: Religious History 1960–2025

open access: yes
Journal of Religious History, EarlyView.
Alexandra Walsham
wiley   +1 more source

Complexity of Roman {2}-Domination and the Double Roman Domination in Graphs [PDF]

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
For a simple, undirected graph a Roman {2}-dominating function (R2DF) has the property that for every vertex with f(v) = 0, either there exists a vertex with f(u) = 2, or at least two vertices with The weight of an R2DF is the sum The minimum weight of an R2DF is called the Roman {2}-domination number and is denoted by A double Roman dominating ...
Chakradhar Padamutham
exaly   +7 more sources

Survey on Roman {2}-Domination

open access: yesMathematics
The notion of Roman {2}-domination was introduced in 2016 as a variant of Roman domination, a concept inspired by a defending strategy used by the emperor Constantine (272–337 AD) to protect the Roman Empire. Since then, a considerable number of papers on Roman {2}-domination and its variants have been published.
Bana Al Subaiei   +2 more
exaly   +3 more sources

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