Irrational numeric values in TUS

[karl williamson]

The Unicode standard only gives numeric values to rational numbers.  Is 
the reason for this merely because of the difficulty of representing 
irrational ones?

In looking through the list of code points, I actually found only one 
case where a character totally unambiguously refers to a particular 
irrational number, and that is U+2107, EULER CONSTANT.  NamesList.txt 
says that U+03C0, GREEK SMALL LETTER PI is used for the ratio of a 
circle's circumference to its diameter, but it has other uses as well, 
and does not have the Math property.  The various Math PI's don't seem 
that they necessarily mean this value either.  Things like the two 
characters that have "Planck's constant" in their names, even if the 
code points always meant that, have different values in different 
measurement systems, so couldn't be said to refer to particular numbers.

I'm curious if any thought was given to this, and what code points I'm 
missing in my analysis.