26-02-2013, 09:48 AM
A century of parentheses languages
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Parentheses have appeared in algebraic writing in the
XV-XVI century. Erasmus of Rotterdam calls them lunulae
Earlier and until the XVIII century, overline vinculum had
been used for grouping literals into a term
aa + bb m instead of aa + bbm
Abstracting from the contents of parenthesized expressions,
Walter von Dyck’s (1856-1934) name has been given to the
formal language every computer science student knows.
Dyck’s language
The alphabet has just two letters: the open/close
parentheses