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Merge pull request #48 from chrisbarrett/patch-1

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Fix typo in T-Lam typing rule
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Stephen Diehl 2015-02-06 07:40:49 -05:00
commit 249e88fa40
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004_type_systems.md
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@ -499,7 +499,7 @@ a one-to-one mapping between each syntax term and a typing rule.
$$
\begin{array}{cl}
\displaystyle \frac{x:\sigma \in \Gamma}{\Gamma \vdash x:\sigma} & \trule{T-Var} \\ \\
\displaystyle \infrule{\Gamma, x : \tau_1 \vdash e : \tau_2}{\Gamma \vdash \lambda x . \tau_2 : e_1 \rightarrow e_2 } & \trule{T-Lam} \\ \\
\displaystyle \infrule{\Gamma, x : \tau_1 \vdash e : \tau_2}{\Gamma \vdash \lambda x . e : tau_1 \rightarrow tau_2 } & \trule{T-Lam} \\ \\
\displaystyle \infrule{\Gamma \vdash e_1 : \tau_1 \rightarrow \tau_2 \andalso \Gamma \vdash e_2 : \tau_1}{\Gamma \vdash e_1 e_2 : \tau_2} & \trule{T-App} \\ \\
\displaystyle
\frac{\Gamma \vdash c : \t{Bool} \quad \Gamma \vdash e_1 : \tau