diff --git a/main.tex b/main.tex index bdf36d5910bab14d07ff013a83276e8069539e26..439859507d866b124c436e7c6ace061f35f7a746 100644 --- a/main.tex +++ b/main.tex @@ -248,14 +248,14 @@ Suppose that the following are satisfied: \noindent Then we have the following: -\begin{itemize} +\begin{enumerate} \item The pseudo-wall is left of $u$'s vertical characteristic line (if this is a real wall then $v$ is being semistabilized by an object with Chern character $u$, not $-u$) - \item $\mu(u)<\mu(v)$, i.e., $u$'s vertical characteristic line is left of $v$'s vertical - characteristic line + \item $\beta(P)<\mu(u)<\mu(v)$, i.e., $u$'s vertical characteristic line is + positioned between $P$ and $v$'s vertical characteristic line \item $\chern_2^{P}(u)>0$ -\end{itemize} +\end{enumerate} Furthermore, only the last two of these consequences are sufficient to recover all of the suppositions above. \end{lemma} @@ -368,8 +368,6 @@ def correct_hyperbola_intersection_plot(): p.ymax(coords_range[1][2]) p.ymin(coords_range[1][1]) p.axes_labels([r"$\beta$", r"$\alpha$"]) - - return p \end{sagesilent} @@ -400,8 +398,20 @@ $\beta$-axis at $\beta=\mu(u)$ and $\beta=\mu(v)$ respectively. We must have $\mu(u)<\mu(v)$, that is, the vertical characteristic line for $u$ is to the left of the one for $v$ (consequence 2). Finally, the fact that it is the left branch of the hyperbola for $u$ implies -consequence 1. - +consequence 1 and $\beta{P}<\mu(u)$. + + +Conversely, suppose that the consequences 2 and 3 are satisfied. +Consequence 2 implies that the assymptote for the left branch of the +characteristic hyperbola for $u$ is to the left of the one for $v$. +Consequence 3, along with $\beta{P}<\mu(u)$, implies that $P$ must be in the +region left of the left branch of the characteristic hyperbola for $u$. +These two facts imply that the left branch of $u$'s hyperbola is to the right of +that of $v$'s at $\alpha=\alpha(P)$, but crosses to the left side as +$\alpha \to +\infty$. This implies suppositions 1 and 2, and that the +characteristic curves for $u$ and $v$ must be in the configuration illustrated +in Fig \ref{fig:correct-hyperbol-intersection}. +Recalling consequence 3 finally confirms supposition 3. \end{proof} \begin{sagesilent}