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@ -3117,7 +3117,6 @@ A hallmark of a Turing-complete language is that it can host an interpreter for
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$\lambda$-calculus is also straightforward to formalize with a small-step semantics\index{small-step operational semantics} and evaluation contexts\index{evaluation contexts}, following the method of Section \ref{eval_contexts}.
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$\lambda$-calculus is also straightforward to formalize with a small-step semantics\index{small-step operational semantics} and evaluation contexts\index{evaluation contexts}, following the method of Section \ref{eval_contexts}.
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One might argue that the technique is even simpler for $\lambda$-calculus, since we must deal only with expressions, not also imperative variable valuations.
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One might argue that the technique is even simpler for $\lambda$-calculus, since we must deal only with expressions, not also imperative variable valuations.
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$$\begin{array}{rrcl}
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$$\begin{array}{rrcl}
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\textrm{Evaluation contexts} & C &::=& \Box \mid C \; e \mid v \; C
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\textrm{Evaluation contexts} & C &::=& \Box \mid C \; e \mid v \; C
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\end{array}$$
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\end{array}$$
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