Palindrome (; "again") and ' (; "way, direction"). Palindromes date back at least to 79 AD, as a palindrome was found as a graffito at Herculaneum, a city buried by ash in that year. This palindrome, called the Sator Square, consists of a sentence written in Latin: "Sator Arepo Tenet Opera Rotas" ("The sower Arepo holds with effort the wheels"). It is remarkable for the fact that the first letters of each word form the first word, the second letters form the second word, and so forth. Hence, it can be arranged into a word square that reads in four different
Palindrome band members. A palindromic number is a number whose digits, with [[decimal]] representation usually assumed, are the same read backward, for example, 5885. They are studied in [[recreational mathematics]] where palindromic numbers with special properties are sought. A [[palindromic prime]] is a palindromic number that is a [[prime number]], for example, 191 and 313. The [[continued fraction]] of + ⌊⌋ is a repeating palindrome when "n" is an integer, where essentially, for any positive "x", ⌊"x"⌋ denotes the [[Floor and ceiling functions|integer part]] of "x". The question of whether [[Lychrel number]]s exist is an unsolved problem in mathematics about whether