Book XLIV · Prior apps / combine
Ubh-310 / island roof
Track B42-α sketch to Pb-142. Cartan matrix. 969 preference. Not a recipe.
Sketch
Ubh-310 is a study sketch of a long α-cascade toward a lead island. Cartan-matrix and 969-preference notes sit beside it. This is not a synthesis claim, not a how-to, and not a device.