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In number theory, a Descartes number is an odd number which would have been an odd perfect number if one of its composite factors were prime.They are named after René Descartes who observed that the number D = 3 2 ⋅7 2 ⋅11 2 ⋅13 2 ⋅22021 = (3⋅1001) 2 ⋅ (22⋅1001 − 1) = 198585576189 would be an odd perfect number if only 22021 were a prime number, since the sum-of-divisors ...
From the early 15th century to the early 17th century the Age of Discovery had, through Portuguese seafarers, and later, Spanish, Dutch, French and English, opened up southern Africa, the Americas (New World), Asia and Oceania to European eyes: Bartholomew Dias had sailed around the Cape of southern Africa in search of a trade route to India; Christopher Columbus, on four journeys across the ...
The Search for Truth by Natural Light [1] (La recherche de la vérité par la lumière naturelle) is an unfinished philosophical dialogue by René Descartes “set in the courtly culture of the ‘ honnête homme ’ and ‘ curiosité ’.” [2] It was written in French (presumably after the Meditations was completed [3]) but first published (Amsterdam, 1684) in Dutch translation in a ...
Left to right: Roald Amundsen, Helmer Hanssen, Sverre Hassel and Oscar Wisting after first reaching the South Pole on 16 December 1911. The Heroic Age of Antarctic Exploration was an era in the exploration of the continent of Antarctica which began at the end of the 19th century, and ended after the First World War; the Shackleton–Rowett Expedition of 1921–1922 is often cited by historians ...
Hanno the Navigator (sometimes "Hannon"; Punic: 𐤇𐤍𐤀, ḤNʾ; [1] Greek: Ἄννων, romanized: Annōn [2]) was a Carthaginian explorer (sometimes identified as a king) who lived during the fifth century BC, known for his naval expedition along the coast of West Africa.
The Descartes Prize was an annual award in science given by the European Union, named in honour of the French mathematician and philosopher, René Descartes. The prizes recognized Outstanding Scientific and Technological Achievements Resulting from European Collaborative Research.
The wax argument or the sheet of wax example is a thought experiment that René Descartes created in the second of his Meditations on First Philosophy.He devised it to analyze what properties are essential for bodies, show how uncertain our knowledge of the world is compared to our knowledge of our minds, and argue for rationalism.
In Meditation Three, Descartes is going to establish not only that there is a God but that God is not a deceiver. When Descartes first introduces the evil demon he says, "I will suppose therefore that not God, who is supremely good and the source of truth, but rather some malicious demon, had employed his whole energies in deceiving me."