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In algebraic number theory, the Hilbert class field E of a number field K is the maximal abelian unramified extension of K. Its degree over K equals the class number of K and the Galois group of E over K is canonically isomorphic to the ideal class group of K using Frobenius elements for prime ideals in K .
Animated map showing confirmed COVID-19 cases spreading from 22 January (high resolution) Date when first case in each first-level administration was reported. This article documents the chronology and epidemiology of SARS-CoV-2 in March 2020, the virus which causes the coronavirus disease 2019 (COVID-19) and is responsible for the COVID-19 ...
Contains articles relating to sports events which were suspended/delayed but later played to a conclusion due to the COVID-19 pandemic – also applies to current affected events which awaited a decision on an outcome at the time of categorisation.
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The timeline of the COVID-19 pandemic lists the articles containing the chronology and epidemiology of SARS-CoV-2, [1] the virus that causes the coronavirus disease 2019 and is responsible for the COVID-19 pandemic. The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2]
Del Rio was one of the first to advocate for drastic measures in schools, including shutdowns, in 2020 as the coronavirus spread. “The approach to this virus,” he said of mpox, “is very ...
The COVID-19 pandemic is an ongoing viral pandemic of coronavirus disease 2019 (COVID-19), a novel infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The pandemic affected the city of Columbus, Ohio , as Ohio's stay-at-home order shuttered all nonessential businesses, and caused event cancellations into 2021.
A series of tour cancellations and changes by big-name artists has sparked questions about whether the post-pandemic live music boom could be cooling. Why some major artists are suddenly canceling ...