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Source for wiki BeyondCurryingHemann version 2
[http://webyrd.net/scheme-2013/papers/HemannCurrying2013.pdf λ* : Beyond Currying]
The proposed name is `lambda*`, not `λ*`.
The proposal is Variant 5, which has no support for zero-argument or zero-or-more-arguments procedures, with the additional feature of Variant 8, supporting multi-expression bodies. Section 4 says "nullary `λ∗` functions seem to be of little to no use", and I agree: they seem to be provided only so that `lambda*` can fully subsume `lambda`, which I think is a mistake (it makes detecting an error in the number of arguments at compile time impossible).