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Lionel Sharples Penrose, FRS (Londres, 11 de junho de 1898 — Londres, 12 de maio de 1972) foi um psiquiatra, geneticista, matemático e teórico do xadrez britânico. Realizou trabalhos pioneiros sobre genética e retardo mental .
Lionel Sharples Penrose, FRS (11 June 1898 – 12 May 1972) was an English psychiatrist, medical geneticist, paediatrician, mathematician and chess theorist, who carried out pioneering work on the genetics of intellectual disability.
The Penrose method (or square-root method) is a method devised in 1946 by Professor Lionel Penrose [1] for allocating the voting weights of delegations (possibly a single representative) in decision-making bodies proportional to the square root of the population represented by this delegation.
Population As Of 2005Percent Of World PopulationVoting WeightPercent Of Total Weight1People's Republic of China1,306,313,81220.30%2India1,080,264,38816.79%3United States of America297,200,0004.62%4Indonesia241,973,8793.76%Born in Colchester, Essex, Roger Penrose is a son of physician Margaret (née Leathes) and psychiatrist & geneticist Lionel Penrose. [b] His paternal grandparents were J. Doyle Penrose , an Irish-born artist, and The Hon. Elizabeth Josephine Peckover, daughter of Alexander Peckover, 1st Baron Peckover ; his maternal grandparents were ...
The Penrose stairs or Penrose steps, also dubbed the impossible staircase, is an impossible object created by Oscar Reutersvärd in 1937 and later independently discovered and made popular by Lionel Penrose and his son Roger Penrose.
Lionel Sharples Penrose, né le 11 juin 1898 et mort le 12 mai 1972, est un psychiatre, médecin généticien, pédiatre, mathématicien et auteur de problèmes d'échecs, qui a réalisé des travaux pionniers sur la génétique de la déficience intellectuelle [2], [3]. À partir de 1945, il entre à l'University College de Londres ...
Independently from Reutersvärd, the triangle was devised and popularized in the 1950s by psychiatrist Lionel Penrose and his son, the mathematician and Nobel Prize laureate Roger Penrose, who described it as "impossibility in its purest form".
