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  1. en.wikipedia.org › wiki › Empty_stringEmpty string - Wikipedia

    The empty string should not be confused with the empty language ∅, which is a formal language (i.e. a set of strings) that contains no strings, not even the empty string. The empty string has several properties: |ε| = 0. Its string length is zero. ε ⋅ s = s ⋅ ε = s. The empty string is the identity element of the concatenation operation

  2. In the 18th century, Isaac Newton's corpuscular theory was held to be true; it took Thomas Young's well-known slit experiment in 1803 to persuade most scientists to believe Huygens's theory. [180] On October 21, 1743, according to the popular myth, a storm moving from the southwest denied Franklin the opportunity of witnessing a lunar eclipse .

  3. en.wikipedia.org › wiki › SmallpoxSmallpox - Wikipedia

    In 18th-century Europe, it is estimated that 400,000 people died from the disease per year, and that one-third of all cases of blindness were due to smallpox. [10] [17] Smallpox is estimated to have killed up to 300 million people in the 20th century [18] [19] and around 500 million people in the last 100 years of its existence. [20]

  4. Carl Philipp Emanuel Bach (8 March 1714 – 14 December 1788), also formerly spelled Karl Philipp Emmanuel Bach, and commonly abbreviated C. P. E. Bach, was a German Classical period musician and composer, the fifth child and second surviving son of Johann Sebastian Bach and Maria Barbara Bach.

  5. The latest Lifestyle | Daily Life news, tips, opinion and advice from The Sydney Morning Herald covering life and relationships, beauty, fashion, health & wellbeing

  6. 18th-century Irish architect and his wife. Of their children, said to number 21 or 24, only eight survived to adulthood, including the painters Thomas Roberts and Thomas Sautelle Roberts. 21 Johanna O'Sullivan and William O'Daly 1837

  7. Lord Desborough: In 1920, The Times confused the British politician with Lord Bessborough. Lord Desborough died in 1945. Henri Deterding: The British newspaper the Daily Mail mistakenly published the obituary of Deterding, the head of the oil company Royal Dutch Shell, on June 27, 1924, and the news was copied by The New York Times under the heading "Henry Deterding dies at film show; Director ...

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