He has just realized this morning a characteristic property of 2-dimensional origami geometry such that :
There exists an isometry between a '(pseudo-) elliptic' [folded] structure and a '(pseudo-) hyperbolic' [folded] structure, both corresponding to the same folding diagram.
This result differs from the famous foundational theorem in 2-dimensional differential geometry.
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Notice that the date #
% It may be true to hold such 'result' at some cases in approximation.
See the article :
" Different shapes from a diagram ". %

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