I wonder what does the Go team think about allowing Math Symbols in
identifiers?
My need is to simplify my quantum computing code for tensor products:
```
func ⊗(ops *tensor.Dense) *tensor.Dense {...}
cnot := ⊗(one, one, σX) + ...
```
As shown above, the Pauli matrix σX works nicely, but the product ⊗
unfortunately doesn't.
One drawback is that people may worry this will make code less readable.
But I think anyone who has overcome the math in any quantum textbook would
find allowing Math Symbols actually improving readability due to tighter
adherence to papers!
In particular, I propose to edit the Go spec's source code representation
<https://go.dev/ref/spec#Source_code_representation> section to
```
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm,
Lo, Sm as Unicode letters.
```
(the Sm <Math Symbol> category is added)
There's this related issue <https://github.com/golang/go/issues/41707>, but
that issue was more of a question than a proposal.
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