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Update before lecturing on BasicSyntax

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Adam Chlipala 2021-02-15 16:58:40 -05:00
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frap_book.tex
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@ -46,7 +46,7 @@ For more information, see the book's home page:
\mbox{}\vfill
\begin{center}
Copyright Adam Chlipala 2015-2017.
Copyright Adam Chlipala 2015-2021.
This work is licensed under a
@ -407,7 +407,7 @@ The notations are suggestive, but in fact we have free reign in choosing the set
The formal theory is then as follows, where we consider as ``true'' only those equalities that follow from the axioms.
$$\begin{array}{rrcl}
\textrm{Variables} & x &\in& \mathsf{Strings} \\
\textrm{Terms} & e &::=& x \mid e + e \mid e \times e \\
\textrm{Terms} & e &::=& 0 \mid 1 \mid x \mid e + e \mid e \times e \\
\textrm{Propositions} & \phi &::=& e = e
\end{array}$$