Set Theory 4
1 <Word> is a permutation of letters.
2 <Sentence> is a permutation of <word>s.
3 <Language> is a set of <sentence>s.
4 <Word>s and <sentence>s have <pattern>s and partial <variation>s.
5 The <pattern> is shown by # #.
6 The <variation> is shown by { }.
7 For example, /you/, /your/ and /yours/ have a <pattern> #you-#, a <variation> {0, r, rs}.
8 <Pattern> is a permutation.
9 <Variation> is a combination.
10 <Sentence> is a permutation of <permutations and combinations>.
11 <Word> has <grammar>.
12 <Grammar> has <item>s.
13<Grammar> consists of a pair of <item>s.
14 The pair consists of right half and left half.
15 <Item>s have hierarchy.
16 Each hierarchy is called <class>.
17 <Grammar> is a permutation of <class>s.
18 <Language> consists of <permutations and combinations>.
19 Meaning in <language> is expressed by permutation and combination.
Bandaisan August 23, 2005
Sekinan Research Field of Language
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