Graded ring with rational degrees

[Rosie Shen]

Hi,

I was trying to create a graded ring with degrees being rational numbers:

R = QQ[x, y, Degrees => {1, 1/2}]

but got the following error: expected a list, sequence, or string. 

The code R = QQ[x, y, Degrees => {1, 2}] runs perfectly fine. Is this because having rational degrees is not supported in M2?

Thanks!

- Rosie

[Mahrud Sayrafi]

That's right, the degrees must be integers, though the degree group may have torsion (e.g. ZZ/3).

The error is definitely misleading and should be fixed though.

Mahrud

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[Rosie Shen]

Okay, thanks!