diff --git a/main.tex b/main.tex index facd95285d121c0c9efb85d7f0623a08439bf6e1..308f1fe33e158ba1fda29459918fb87ee784802a 100644 --- a/main.tex +++ b/main.tex @@ -643,7 +643,7 @@ $\nu(u)>\nu(v)$ inside the circular pseudo-wall. \end{problem} This will give all pseudo-walls between the chamber corresponding to Gieseker stability and the stability condition corresponding to $P$. -The purpose of the final `direction' condition is because, up to that point, +The purpose of the final `direction' condition is because, up to that condition, semistabilizers are not distinguished from their corresponding quotients: Suppose $E\hookrightarrow F\twoheadrightarrow G$, then the tilt slopes $\nu_{\alpha,\beta}$ @@ -653,7 +653,7 @@ In this case, $\chern(E)$ is a pseudo-semistabilizer of $\chern(F)$, if and only if $\chern(G)$ is a pseudo-semistabilizer of $\chern(F)$. The numerical inequalities in the definition for pseudo-semistabilizer cannot tell which of $E$ or $G$ is the subobject. -However what can be distinguished is the direction across the wall that +However, what can be distinguished is the direction across the wall that $\chern(E)$ or $\chern(G)$ destabilizes $\chern(F)$ (they will each destabilize in the opposite direction to the other). The `inwards' semistabilizers are preferred because we are moving from a @@ -681,12 +681,14 @@ $\beta$-axis. This is because all circular walls left of $V_v$ intersect $\Theta_v^-$ (once). The $\beta_{-}(v) \in \QQ$ condition is to ensure that there are finitely many solutions. As mentioned in the introduction (\ref{sec:intro}), this is known, -however this will also be proved again in passing in this article. +however this will also be proved again implicitly in section +\ref{sect:prob2-algorithm}, where an algorithm is produced to find all +solutions. This description still holds for the case of rank 0 case if we consider $V_v$ to be infinitely far to the right (see section \ref{subsubsect:rank-zero-case-charact-curves}). -Note also that the $\beta_-(v)$ condition always holds for $v$ rank 0. +Note also that the condition on $\beta_-(v)$ always holds for $v$ rank 0. \subsection{Numerical Formulations of the Problems} @@ -697,12 +699,13 @@ problem with the help of lemma \ref{lem:pseudo_wall_numerical_tests}. \begin{lemma}[Numerical Tests for Sufficiently Large `left' Pseudo-walls] \label{lem:num_test_prob1} Given a Chern character $v$ with non-negative rank - (with $\chern_1(v)>0$ if rank 0) + (and $\chern_1(v)>0$ if rank 0), and $\Delta(v) \geq 0$, and a choice of point $P$ on $\Theta_v^-$. - Solutions $u=(r,c\ell,\frac{e}{\lcm(m,2)}\ell^2)$ + Solutions $u=(r,c\ell,d\ell^2)$ to problem \ref{problem:problem-statement-1}. - Are precisely given by integers $r,c,d$ satisfying the following conditions: + Are precisely given by $r,c \in \ZZ$, $d \in \frac{1}{\lcm(m,2)}$ + satisfying the following conditions: \begin{enumerate} \item $r > 0$ \label{item:rankpos:lem:num_test_prob1} @@ -736,9 +739,10 @@ problem with the help of lemma \ref{lem:pseudo_wall_numerical_tests}. \label{cor:num_test_prob2} Given a Chern character $v$ with positive rank and $\Delta(v) \geq 0$, such that $\beta_{-}\coloneqq\beta_{-}(v) \in \QQ$. - Solutions $u=(r,c\ell,\frac{e}{\lcm(m,2)}\ell^2)$ + Solutions $u=(r,c\ell,d\ell^2)$ to problem \ref{problem:problem-statement-2}. - Are precisely given by integers $r,c,e$ satisfying the following conditions: + Are precisely given by $r,c \in \ZZ$, $d\in\frac{1}{\lcm(m,2)}\ZZ$ satisfying + the following conditions: \begin{enumerate} \item $r > 0$ \label{item:rankpos:lem:num_test_prob2}