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Mathematical general relativity [PDF]

open access: yesGeneral Relativity and Gravitation, 2019
We present a number of open problems within general relativity. After a brief introduction to some technical mathematical issues and the famous singularity theorems, we discuss the cosmic censorship hypothesis and the Penrose inequality, the uniqueness of black hole solutions and the stability of Kerr spacetime and the final state conjecture, critical ...
Carla Cederbaum   +3 more
openaire   +3 more sources

Clustering Productive Palm Land using the K- Means Clustering Algorithm

open access: yesJournal of Innovation Information Technology and Application, 2023
Indonesia is a country with a tropical climate that has many oil palm plantations. CV. Alkema Deo is one of the companies that manage oil palm plantations in Sampit City, East Kotawaringin Regency, Central Kalimantan. CV.
Geofanny Widianto Sihite   +1 more
doaj   +1 more source

Front Matter - Vol 5 Issue 2 | December 2021

open access: yesIJIE (Indonesian Journal of Informatics Education), 2021
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Editor IJIE
doaj   +1 more source

Full Pages - Vol 5 Issue 2 | December 2021

open access: yesIJIE (Indonesian Journal of Informatics Education), 2021
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Editor IJIE
doaj   +1 more source

The first journal in exact sciences "Vestnik matematiėeskich nauk"

open access: yesKnygotyra
The content, structure, and history of the first periodic journal of exact sciences in Russia, published by astronomer Matvei Gusev (1826-1866) in Vilnius from 1860 to 1863, are considered. The first volume contained 25 issues (198 pages) and the second
Libertas Klimka
doaj   +3 more sources

Acknowledgement for Reviewers

open access: yesJournal of Research and Advances in Mathematics Education, 2019
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Editorial Board
doaj   +1 more source

Front Matter (Cover, Editorial Board, Indexing and Abstracting, Table of Content)

open access: yesJournal of Research and Advances in Mathematics Education, 2019
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Editorial Board
doaj   +1 more source

Using the median and the mean of the income to establish the poverty lines [PDF]

open access: yesComputational Methods in Social Sciences, 2014
One of the methods to estimate the poverty level inside a given population is based on how to define the poverty line values. Each person having his income under the poverty threshold will be considered to be poor.
Maria Livia STEFANESCU   +1 more
doaj  

The relationship between tourism and economic growth in greece economy: a time series analysis [PDF]

open access: yesComputational Methods in Social Sciences, 2015
In this study it’s analyzed how and in what way the expenditures of foreign visitors who came to Greece between 1980 and 2013 affected economic growth for Greece.
Turgut Bayramoğlu, Yılmaz Onur Arı
doaj  

Mathematical general relativity: A sampler [PDF]

open access: yesBulletin of the American Mathematical Society, 2010
We provide an introduction to selected recent advances in the mathematical understanding of Einstein's theory of gravitation.
Chruściel, Piotr T.   +2 more
openaire   +2 more sources

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