"Pseudonymous 20\u201321st century mathematician with research in functional analysis, whose pseudonym \"P. Orno\" humorously suggests the word \"pornography\"" . . . "Orno, Peter"@en . "Beginning in 1974, the fictitious Peter Orno (alternatively, Peter \u00D8rno, P. \u00D8rno, and P. Orno) appeared as the author of research papers in mathematics. According to Robert Phelps, the name \"P. Orno\" is a pseudonym that was inspired by \"porno\", an abbreviation for \"pornography\". Orno's short papers have been called \"elegant\" contributions to functional analysis. Orno's theorem on linear operators is important in the theory of Banach spaces."@en . . . . . . . "Peter \u00D8rno"@en . "1974Z"^^ .