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The first ordinal number that is not a natural number is expressed as ω; this is also the ordinal number of the set of natural numbers itself. The least ordinal of cardinality ℵ 0 (that is, the initial ordinal of ℵ 0) is ω but many well-ordered sets with cardinal number ℵ 0 have an ordinal number greater than ω.
[87] [88] Honshu has the highest population density at 450 persons/km 2 (1200/sq mi) as of 2010, while Hokkaido has the lowest density of 64.5 persons/km 2 as of 2016. [89] As of 2014, approximately 0.5% of Japan's total area is reclaimed land (umetatechi). [90] Lake Biwa is an ancient lake and the country's largest freshwater lake. [91]
[35] [36] The sequence number of the year in the 19-year cycle is called the "golden number", and is given by the formula GN = (Y mod 19) + 1. That is, the year number Y in the Christian era is divided by 19, and the remainder plus 1 is the golden number.
An increasing number of scholars have expressed reservations about ever defining the essence of religion. [67] They observe that the way the concept today is used is a particularly modern construct that would not have been understood through much of history and in many cultures outside the West (or even in the West until after the Peace of ...
Together, the 20 lifeboats could hold 1,178 people — roughly half the number of passengers on board, and a third of the number the passengers the ship could have carried at full capacity (a number consistent with the maritime safety regulations of the era). The British Board of Trade's regulations required 14 lifeboats for a ship 10,000 tonnes.
A number of measures are adapted from variants used to evaluate classification tasks. In place of counting the number of times a class was correctly assigned to a single data point (known as true positives), such pair counting metrics assess whether each pair of data points that is truly in the same cluster is predicted to be in the same ...
However, Eritrea still faces many challenges. Although the number of physicians increased from only 0.2 in 1993 to 0.5 in 2004 per 1000 people, this is still very low. [240] Malaria and tuberculosis are common. [243] HIV prevalence for ages 15 to 49 years exceeds 2%. [243] The fertility rate is about 4.1 births per woman. [243]