diff --git a/main.tex b/main.tex index edfd643ff8c4ab73090b170fbeab812e1e2d1144..a929a45ec2355e9fb1fe85bd1b6ba023eae4027c 100644 --- a/main.tex +++ b/main.tex @@ -104,7 +104,7 @@ Characters} \[ u = \left(r, c\ell, d \frac{1}{2} \ell^2\right) \] - which has the same slope as $v$: $\mu_{\sigma}(u) = \mu_{\sigma}(v)$. + which has the same tilt slope as $v$: $\mu_{\sigma}(u) = \mu_{\sigma}(v)$. Note $u$ does not need to be a Chern character of an actual sub-object of some object in the stability condition's heart with Chern character $v$. @@ -196,8 +196,17 @@ $\alpha$-$\beta$-half-plane into regions where the signs objects of Chern charac Secondly, it gives more of a fixed target for some $u=(r,c\ell,d\frac{1}{2}\ell^2)$ to be a pseudo-semistabilizer of $v$, in the following sense: If $(\alpha,\beta)$, is on the hyperbola $\chern_2^{\alpha, \beta}(v)=0$, then -$\mu_{\alpha,\beta}(v)=0$ and for any $u$, $u$ is a pseudo-semistabilizer of $v$ +for any $u$, $u$ is a pseudo-semistabilizer of $v$ iff $\mu_{\alpha,\beta}(u)=0$, and hence $\chern_2^{\alpha, \beta}(u)=0$. +In fact, this allows us to use the characteristic curves of some $v$ and $u$ +(with $\Delta(v)\geq 0$, $\Delta(u)\geq 0$ and positive ranks) to determine the +location of the pseudo-wall where $u$ pseudo-semistabilizes $v$. +%TODO ref forwards + +Commenting on the geometry of the hyperbola, it always has left and right +branches, or degenerates to 2 lines. This is a consequence of $\Delta(v)\geq 0$. +Furthermore the assymptotes are angled at $\pm 45^\circ$, crossing through the +base of the first characteristic curve $\chern_1^{\alpha,\beta}=0$ (vertical line).