started a subdir for the book

This commit is contained in:
aarne
2010-11-22 12:55:37 +00:00
parent 8ab5ec00c6
commit 46137ab6a6
97 changed files with 2026 additions and 0 deletions

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abstract Strings = Letters ** {
cat S ;
fun
E : S ;
C : L -> S -> S ;
}