Infinity symbol Infinity symbol The infinity symbol (sometimes called the lemniscate) is a mathematical symbol representing the concept of infinity. The shape of a sideways figure eight has a long pedigree; for instance, it appears in the cross of Saint Boniface, wrapped around the bars of a Latin cross. However, John Wallis is credited with introducing the infinity symbol with its mathematical meaning in 1655, in his "De sectionibus conicis". Wallis did not explain his choice of this symbol, but it has been conjectured to be a variant form of a Roman numeral for 1,000 (originally CIƆ, also CƆ), which was sometimes
Sideways I Unicode standard in 2011. It has since been encoded at code point in Unicode 7.0. Sideways I The Sideways I is an epigraphic variant of Latin capital letter I used in early medieval Celtic inscriptions from Wales and southwest England (Cornwall and Devon). About 36 monumental inscriptions in Wales, and about 15 in Cornwall and Devon, mostly dating from the 5th-6th centuries, make use of this letter. Except for a single inscription from the Isle of Man, it is not found in monumental inscriptions elsewhere. The letter is used exclusively in a word-final position for Latin words (or Latinized Celtic