4.8

Reading the table headers

Column	Norm	Extension	Defined on
EB	kinetic-energy (meters)	none, raw endpoints	matched pairs with finite limits on both sides
Eαϕ	split, α = 1	compactified, κ = π	every matched pair, continuous joints included
Eαϕ,tree	split, α = 1	compactified and lifted to the tree	whole objects, the primary score

The rule is simple once seen: the subscript is the inner product inside the norm, the superscript is what was done to the endpoints before or after E. The design space is the product of the two choices, and any cell of it is a legitimate score.