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Equation 8 · Typed Tools: Protocols as an Agent's Action Alphabet

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Σ\Sigma

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Σ\Sigma

Symbol Sigma

Sigma is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

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What the article says around this equation

The reason this framing earns its keep is that it makes the interesting questions unavoidable. How is a proposed element of At\mathcal{A}_t checked before it becomes an action? How finely is the capability carved into distinct t ? What happens when the caller does not learn whether Σ\Sigma changed? And what does Rt\mathcal{R}_t contain when things go wrong?

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