Differences

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--- sav08:forward_vcg [2009/03/10 20:47]
vkuncak
+++ sav08:forward_vcg [2010/03/09 17:18]
vkuncak
@@ Line 84: / Line 84: @@
    sp(\{s.\ P\}, r_c(c_1)) = \{ s.\ sp_F(P,c_1) \}
 \]
@@ Line 89: / Line 91: @@
 ===== Example =====
-Let's take a small example with precondition: $\{x \ge 5 \wedge y \ge 3\}$ and code:
+Precondition: $\{x \ge 5 \wedge y \ge 3\}$. Code:
 <code>
 x = x + y + 10
@@ Line 95: / Line 97: @@
 \[
-sp(x \ge 5 \land y \ge 3, x=x+1) = \exists x_0.\ x_0 \ge 5 \wedge y \ge 3\ \land\ x = x_0 + y
+\begin{array}{l}
+sp(x \ge 5 \land y \ge 3, x=x+y+10) = \\
+                   \exists x_0.\ x_0 \ge 5 \wedge y \ge 3\ \land\ x = x_0 + y + 10 \\
+\leftrightarrow \ y \ge 3 \land x \ge y + 15
+\end{array}
 \]