Add T-Call rule without receiver

tRules.tex

@@ -10,8 +10,8 @@ where existential types are implicitly \textit{opened} and \textit{closed}.
 
 %The T-Elvis rule mimics the type judgement of a branch expression like \texttt{if-else}.
 %and is solely used for examples.
-The calculus does not include method overloading or method overriding for simplicity reasons.
-Type inference for both are described in \cite{TIforFGJ} and can be added to this algorithm accordingly.
+The calculus does not include method overriding for simplicity reasons.
+Type inference for that is described in \cite{TIforFGJ} and can be added to this algorithm accordingly.
 Our algorithm is designed for extensibility with the final goal of full support for Java.
 \unify{} is the core of the algorithm and can be used for any calculus sharing the same subtype relations as depicted in \ref{fig:subtyping}.
 Additional language constructs can be added by implementing the respective constraint generation functions in the same fashion as described in chapter \ref{chapter:constraintGeneration}.
@@ -239,6 +239,26 @@ $\begin{array}{l}
     \end{array}
 \end{array}$
 \\[1em]
+$\begin{array}{l}
+    \typerule{T-Call}\\
+    \begin{array}{@{}c}
+        \Delta, \Delta', \overline{\Delta} \vdash \ol{\type{N}} <: [\ol{S}/\ol{X}]\ol{U} \quad \quad
+        \generics{\ol{X \triangleleft U'}} \type{N} \to \ol{U} \to \type{U} \in \Pi(\texttt{m}) \quad \quad
+        \Delta, \Delta', \overline{\Delta} \vdash \ol{S} <: [\ol{S}/\ol{X}]\ol{U'} \quad \quad
+        \Delta, \Delta', \overline{\Delta} \vdash \ol{S} \ \ok 
+        \\
+        \Delta | \Gamma \vdash \ol{e} : \ol{T} \quad \quad
+        \Delta \vdash \ol{T} <: \overline{\wcNtype{\Delta}{N}} \quad \quad 
+        \Delta \vdash \type{T}, \overline{\wcNtype{\Delta}{N}} \ \ok \quad \quad
+        \Delta, \Delta', \overline{\Delta} \vdash [\ol{S}/\ol{X}]\type{U} <: \type{T} \quad \quad
+        \overline{\text{dom}(\Delta) \subseteq \text{fv}(\type{N})}
+        \\
+        \hline
+    \vspace*{-0.3cm}\\
+        \Delta | \Gamma \vdash \texttt{m}(\ol{e}) : \type{T}
+    \end{array}
+\end{array}$
+\\[1em]
 $\begin{array}{l}
     \typerule{T-Elvis}\\
     \begin{array}{@{}c}