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1806 = pronic number, [51] product of first four terms of Sylvester's sequence, primary pseudoperfect number, [424] only number for which n equals the denominator of the nth Bernoulli number, [425] Schröder number [426] 1807 = fifth term of Sylvester's sequence [427] 1808 = maximal number of regions the plane is divided into by drawing 43 ...
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 .
For example, the identity element of addition is 0 since any sum of a number and 0 results in the same number. The inverse element is the element that results in the identity element when combined with another element. For instance, the additive inverse of the number 6 is -6 since their sum is 0. [41]
Up until the 1970s, Virginia was a racially divided one-party state dominated by the Byrd Organization. [346] They sought to stymie the political power of Northern Virginia, perpetuate segregation, and successfully restricted voter registration such that between 1905 and 1948 voter turnout was regularly below ten percent.
A planet will tend towards a state of radiative equilibrium, in which the power of outgoing radiation equals the power of absorbed incoming radiation. [ 47 ] Earth's energy imbalance is the amount by which the power of incoming sunlight absorbed by Earth's surface or atmosphere exceeds the power of outgoing longwave radiation emitted to space.
Germany, [e] officially the Federal Republic of Germany, [f] is a country in Central Europe.It lies between the Baltic and North Sea to the north and the Alps to the south. Its sixteen constituent states have a total population of over 82 million in an area of 357,596 km 2 (138,069 sq mi), making it the most populous member state of the European Union.
The education system in Pakistan [4] is generally divided into six levels: preschool (for the age from 3 to 5 years), primary (years one to five), middle (years six to eight), secondary (years nine and ten, leading to the Secondary School Certificate or SSC), intermediate (years eleven and twelve, leading to a Higher Secondary School ...