JZdynamics

The basic object in the zeta space framework is a seed $$\mathcal S=(\mathcal I,\Gamma,\Pi),$$ where $\mathcal I$ is a singular stratified surface, $\Gamma\subset \mathcal I$ is a distinguished skeletal graph, and $\Pi$ is a finite symmetry group acting on the seed. The decorated version is $$\mathcal S_{\mathrm{dec}}=(\mathcal I,\Gamma,\Pi,\chi,\rho,\mathcal L),$$ where $\chi$ is coloring data, $\rho$ is holonomy or representation data, and $\mathcal L$ is a line bundle or local system. The guiding idea is that the seed itself is not yet a zeta function. Rather, the seed is a geometric object from which several different spectral realizations may be extracted. For example, one may extract a graph-theoretic realization from $\Gamma$, leading naturally to an Ihara-type zeta function. One may also extract a cone-local analytic realization from neighborhoods of the singular points of $\mathcal I$, leading to theta functions, Mellin transforms, and Bessel kernels. These are not separate ob...

One point that was not rigorous enough in my earlier posts is the proposed relationship between the analytic theta/Mellin calculations and the stratified space $\mathcal I$. I should not merely say that a diffusion equation “suggests” a flow of spectral information unless I explicitly define an operator, a semigroup, and a map relating the cone-local spectral data to the graph/skeleton spectral data on $\Gamma$. The purpose of this note is to isolate a candidate analytic mechanism. The basic function is $$\varphi(x)=e^{1/\ln x}, \qquad 0<x<1.$$ More generally, introduce the one-parameter family $$\varphi_s(x)=\varphi(x)^s=e^{s/\ln x}.$$ Since $\ln x<0$ on $(0,1)$, it is convenient to write $$L=-\ln x>0.$$ Then $$\varphi_s(x)=e^{-s/L}.$$ Thus $\varphi_s$ is not just an arbitrary nonlinear function. It is the exponential of a reciprocal logarithmic scale. The key identity is $$s\frac{\partial^2}{\partial s^2}\varphi_s(x)=-x\frac{\partial}{\partial x}\varphi_s(x).$$ Equivalent...

The point of this post is to reorganize the various constructions I have been developing under a single functorial viewpoint. The basic object is not a single zeta function. It is a geometric seed: $$\mathcal S=(\mathcal I,\Gamma,\Pi).$$                                                        A concept of a (decorated) seed. Arrows                                                  represent a local system, colored bands represent                                                  a stratification of $\Gamma$, and the white chassis               ...

Consider the decorated seed:  $$\mathcal S_{\mathrm{dec}} = (\mathcal I, \Gamma, \Pi, \chi,\rho,\mathcal L)$$  which is a candidate motivic object, with $L$-functions arising through trace constructions on $\mathcal S$. To see what that means, consider: $$ \mathcal S = (\mathcal I, \Gamma, \Pi) $$ which is a $\Pi$-equivariant $4$-sheeted branched cover  $$ p: \mathcal I \longrightarrow \mathbf{ \widehat{C}}  $$ equipped with a distinguished embedded graph $$ \Gamma \subset \mathcal I $$ on the covering surface. $\Gamma$ is combinatorially an octahedral graph. $\Gamma$ contains three distinguished $4$-cycles $\Gamma_x,\Gamma_y, \Gamma_z$ whose union is all of $\Gamma$. The decoration $\chi = \lbrace x,y,z\rbrace$ gives an edge-coloring by $\lbrace x,y,z \rbrace$. This is notably different from Grothendieck's dessins d'enfants, which are downstairs on $\widehat{\mathbf C}$. Write the holonomy representation $$ \rho : \pi_1(\Gamma) \longrightarrow U(1) $$ The piecewise ...

Consider a triple $\mathcal S = (\mathcal I, \Gamma, \Pi)$, where $\mathcal I$ is a compactified 4-sheeted branched cover of $\Bbb C$, $\Gamma \subset \mathcal I$ is a constellation (D'essin D'enfant in simpler cases), and $\Pi$ is a finite nonabelian piecewise isometry group. Specifically, let $\mathcal{O}_1, \dots, \mathcal{O}_4$ be four spindle orbifolds (topologically, Riemann spheres $\widehat{\mathbb{C}}$ each with two cone points). Let their union form the 2-complex: $$\mathcal{I} = \bigcup_{j=1}^{4} \mathcal{O}_j$$ These four surfaces intersect precisely along a 1-dimensional locus $\Gamma$, which serves as the 1-skeleton of the complex. Combinatorially, $\Gamma$ is a 4-regular octahedral graph ($|V| = 6$, $|E| = 12$). Geometrically, $\mathcal{I}$ is intrinsically parameterized within a bounding 3-dimensional cube, with the $6$ vertices (0-cells) of $\Gamma$ sinking into the interior, located exactly on the local coordinate planes $x, y, z = 1/2$. Let $P = \{p_{j,1}, p_...

Consider $\mathcal F=\lbrace \mathcal L_t=(\Bbb C^{\times},g_t(s)) \rbrace_{t\in\Bbb R_{\gt 0}}$ where $g_t(s)=\vert F_t(s) \vert^2ds\otimes d\bar{s}$ and $$F_t(s)=\int_{(0,1)} e^{t^2/\log x} \cdot x^{s-1}dx= 2\sqrt{\frac{t^2}{s}}K_1(2\sqrt{t^2s}). $$ For $K_1$ the modified bessel function of the second kind. Looking at Bessel asymptotics we know that as $s\to 0$, $g_t(s)\sim \frac{1}{|s|^2}ds\otimes d\bar{s}$ (conical) and as $s\to\infty$, $g_t(s)\sim e^{-4\sqrt{t^2s}}ds\otimes d\bar{s}$ (collapsing end), and these asymptotics hold for the later defined $g_{\infty}(s).$  Define a trace over $F_t$ $$\mathcal M(s)=\sum_{t=1}^\infty F_t(s)$$ then the following identity is satisfied   $$\frac{1+2\mathcal M(s)}{1+2\mathcal M(1/s)}= s^{\alpha}$$ where $\alpha$ is the weight. The proof that there exists some $\alpha \in \Bbb R$ such that the identity holds for all $s$ uses Poisson summation.  Define a new metric which encodes the cumulative effect of the metrics on each of...

Let $\{ f_t(x) := e^{\frac{t}{\log x}} \}_{t \in [1/2,2]}$ be a smooth family of functions on $(0,1)$, and let $F_t(s)$ denote their Mellin transforms: $$F_t(s) := \int_0^1 f_t(x) \, x^{s-1} \, dx = 2 \sqrt{\frac{t}{s}} \, K_1(2\sqrt{ts}),$$ where $K_1$ is the modified Bessel function of the second kind. Define the Hermitian metric $$g_t(s) := |F_t(s)|^2 \, ds \otimes d\bar{s}$$ on the punctured complex plane $\mathbb{C}^\times$. Let $S$ be the topological quotient obtained by identifying the boundary curves $f_{1/2}(x)$ and $f_2(x')$ along lines of slope $+1$ in the $(x,f)$-plane. Then: The space $S$ is homeomorphic to the $2$-sphere with two conical singularities, arising from the boundary identifications. The metric $g_t(s)$ induces a globally defined Hermitian metric $g^{\sim}(s)$ on $S$, with conical singularities at $s = 0$ and $s = \infty$. Near $s = 0$, the metric behaves as     $$g_t(s) \sim \frac{1}{|s|^2} ds \otimes d\bar{s},$$     which corresponds to the...

To begin formally laying the groundwork for $\zeta$-space we must revisit the spectral tower. To each $\mathcal F$-completion in dimension $n$, we can take a symmetrical subset $\mathcal I^{(n-1)}$ and enrich these objects with bundles restricted to skeletons. In dimension $n=3$ we have $\mathcal I^{(3-1)}$ and we take line bundles restricted to $\Gamma$ from which we then can associate an Ihara zeta function to $\Gamma$, which may be twisted.  Then we will define $\zeta$-space, or $\zeta^n$ as the space where we associate copies of $\mathcal I^{(n-1)}$ to an integer lattice, $\Bbb Z^n \subset \Bbb R^n$. A lot of work must be done from here but the benefits of this work will be very useful theoretically as well as for applications. Essentially we introduce the spectral tower to classify all the elements which will then be assigned to lattice sites.  Let $\zeta^n$ denote the zeta-structured lattice space: $$\zeta^n := \left\{ z \mapsto \left( \mathcal{I}^{(n-1)}_z,\ \mathcal{L}...

Sheaf Stack over the Dimensional Stratification Site We define a stratified site $\mathcal{S}$ indexed by dimension $n \in \mathbb{Z}_{\geq 2}$, whose objects are geometric-combinatorial models $\mathcal{I}^{(n)}$ associated to dimension-$n$ F-completions. Morphisms in this site correspond to boundary inclusions, coordinate projections, and degenerations between dimensions: $$\mathcal{I}^{(n)} \to \mathcal{I}^{(n-1)} \quad \text{via coordinate slice or foliation boundary}.$$ Let $\mathcal{M}_\Delta^{(n)}$ denote the moduli space of $\Delta$-twisted holonomy representations in dimension $n$, with $\mathcal{M}_\Delta^{(2)} = \mathrm{U}(1)^r / \Delta$ the classical representation torus quotient. We define a sheaf stack of zeta data over $\mathcal{S}$: $$\mathscr{Z} : \mathcal{S}^{\mathrm{op}} \longrightarrow \mathbf{Stacks}$$ such that: For each $n$, $\mathscr{Z}(\mathcal{I}^{(n)})$ is a stack (e.g. derived or topological) encoding the family of zeta sheaves over $\mathcal{M}_\Delta^{(n)}...