> I think that a CAS without a strong programming language is nothing
> but a simple pocket calculator. Therefore, if a mathematical notation
> interferes too much with the requirements of the underlying
> programming language, then the mathematical notation should be
> dropped.

I vote +1 for this argument

>
> Compare this with the example given by Kwankyu: R<x>=ZZ[] resembles a
> chain of inequalities,
>   sage: 5<6>=3
>   True
> and R[x] is not compatible with Python's syntax (if R is to be
> defined). Therefore, I think it is a very reasonable compromise to
> have the additional dot in R.<x>
>

This explanation makes sense. Thank you.

Kwankyu
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