fix

new_system2.tex

@@ -249,10 +249,11 @@ TODO: Algorithmic rules
 \\
 \Infer[LetBase]
   {
+  \Gamma, (y:u) \vdash e\triangleright_x\dt_\circ\\
   \Gamma, (y:u) \vdash e\triangleright_y\dt\\
   \forall v\in \dt.\ \Gamma\fvdash{a}{v}\{(\_,\Gamma_v^i)\}_{i\in I_v}
   }{
-  \Gamma\vdash_{u}\letexp y a e \triangleright_x \textstyle{
+  \Gamma\vdash_{u}\letexp y a e \triangleright_x \dt_\circ \cup\textstyle{
   \bigcup_{v\in \dt}\bigcup_{i\in I_v}\{\Gamma_v^i(x)\}
   }}
   { }