I am now thinking on the boundary of language. Is there any boundary on language? If in language there be any variation, there will be occurred any working of boundary, distinction of changeable part and unchangeable part. Rune Tom's cobortism and cobortism group are concerned for me.
Tom's Theorem
n is positive integer.
When n is not multiple of 4, oriented cobortism group is finite group.
From early time of my study of language universals, finite generation of words and infinitive generation of sentences are always have been concerned.
The early time's papers are shown below for some references.
von Neumann Algebra 2 / Generation Theorem / 2008
Complex Manifold Deformation Theory / Understandability of Language / 2009
Topological Group Language Theory / From Finiteness to Infinity on Language / 2009
Floer Homology Language / Homology Generation of Language / 2009
Duality of Language / Duality of Language / 2012
This paper referred to the boundary of Language.
Tokyo
10 September 2012
Sekinan Research Field of Language