498 where $c_j$ is the restriction of $c^t$ to $\bd B_j$.

   498 where $c_j$ is the restriction of $c^t$ to $\bd B_j$.

   499 If $B_i = B_j$ then $u_i = u_j$.

   499 If $B_i = B_j$ then $u_i = u_j$.

   500 \end{itemize}

   500 \end{itemize}

   501 (See Figure \ref{blobkdiagram}.)

   501 (See Figure \ref{blobkdiagram}.)

   502 \begin{figure}[!ht]\begin{equation*}

   502 \begin{figure}[!ht]\begin{equation*}

   504 \end{equation*}\caption{A $k$-blob diagram.}\label{blobkdiagram}\end{figure}

   504 \end{equation*}\caption{A $k$-blob diagram.}\label{blobkdiagram}\end{figure}

   505 

   505 

   506 If two blob diagrams $D_1$ and $D_2$ 

   506 If two blob diagrams $D_1$ and $D_2$ 

   507 differ only by a reordering of the blobs, then we identify

   507 differ only by a reordering of the blobs, then we identify

   508 $D_1 = \pm D_2$, where the sign is the sign of the permutation relating $D_1$ and $D_2$.

   508 $D_1 = \pm D_2$, where the sign is the sign of the permutation relating $D_1$ and $D_2$.