Trait rustfst::semirings::StarSemiring
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A complete semiring S is a starsemiring that is a semiring that can be augmented with an
internal unary closure operation ∗ defined by a∗=⊕an (infinite sum) for any a ∈ S
.
Furthermore, associativity, commutativity, and distributivity apply to these infinite sums.
For more information : https://cs.nyu.edu/~mohri/pub/hwa.pdf