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The technique for the construction of integers presented in the previous section corresponds to the particular case where there is a single basic operation pair (,) that takes as arguments two natural numbers and , and returns an integer (equal to ).
The number e is a mathematical constant approximately equal to 2.71828 that is the base of the natural logarithm and exponential function.It is sometimes called Euler's number, after the Swiss mathematician Leonhard Euler, though this can invite confusion with Euler numbers, or with Euler's constant, a different constant typically denoted .
Sean Connery plaque near the site of his birth in Fountainbridge, Edinburgh Connery's birth certificate. Thomas Sean Connery was born at the Royal Maternity Hospital in Edinburgh, Scotland, on 25 August 1930; he was named after his paternal grandfather.
Ketamine is a mixture of equal amounts of two enantiomers: esketamine and arketamine. Esketamine is a far more potent NMDA receptor pore blocker than arketamine. [ 11 ] Pure blocking of the NMDA receptor is responsible for the anesthetic, analgesic, and psychotomimetic effects of ketamine.
In the 1940s, a vial of 5,000 Oxford units was standard, [24] but the depending on the batch, could contain anything from 15 mg to 20 mg of penicillin. Later, a vial of 1,000,000 international units became standard, and this could contain 2.5 g to 3 g of natural penicillin (a mixture of penicillin I, II, III, and IV and natural impurities).
The Russian alphabet (ру́сский алфави́т, russkiy alfavit, [a] or ру́сская а́збука, russkaya azbuka, [b] more traditionally) is the script used to write the Russian language.
Google first published exact revenue numbers for YouTube in February 2020 as part of Alphabet's 2019 financial report. According to Google, YouTube had made US$15.1 billion in ad revenue in 2019, in contrast to US$8.1 billion in 2017 and US$11.1 billion in 2018. YouTube's revenues made up nearly 10% of the total Alphabet revenue in 2019.