The "C" and "D" transformations are inverse of each other, but there's no inverse to "K".

It's a destructive transformation. For example, both the ANGSTROM SIGN (Å) and the LATIN CAPITAL LETTER A WITH RING ABOVE (Å) are independent symbols with distinct meanings, but they have the same KC form and KD form. There's no way to know how to reverse the transformation to restore the original meaning.

In reply to Re: Unicode vulgar fraction composition by ikegami
in thread Unicode vulgar fraction composition by raygun

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