Fix some typos and inconsistent notations

1 files changed, 1 insertions, 1 deletions

diff --git a/problem.tex b/problem.tex
index 9d67074..c9037b0 100644
--- a/problem.tex
+++ b/problem.tex
@@ -155,7 +155,7 @@ returns a vector of payments $[p_i(c)]_{i\in \mathcal{N}}$.
     \item \emph{Truthfulness/Incentive Compatibility.} An experiment subject has no incentive to missreport her true cost. Formally, let $c_{-i}$
  be a vector of costs of all agents except $i$. Then, %    $c_{-i}$ being the same). Let $[p_i']_{i\in \mathcal{N}} = p(c_i',
 %    c_{-i})$, then the 
-\begin{align}  p_i(c_i,c_{-i}) - s_i(c_i,c_{-i})\cdot c_i \geq p_i(c_i',c_{-i}) - s(c_i',c_{-i})\cdot c_i, \label{truthful}\end{align} for every $i \in \mathcal{N}$ and every two cost vectors $(c_i,c_{-i})$ and $(c_i',c_{-i})$.
+\begin{align}  p_i(c_i,c_{-i}) - s_i(c_i,c_{-i})\cdot c_i \geq p_i(c_i',c_{-i}) - s_i(c_i',c_{-i})\cdot c_i, \label{truthful}\end{align} for every $i \in \mathcal{N}$ and every two cost vectors $(c_i,c_{-i})$ and $(c_i',c_{-i})$.
     \item \emph{Budget Feasibility.} The sum of the payments should not exceed the
     budget constraint, \emph{i.e.}
     %\begin{displaymath}