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              <p>We show that submultiplicative norms on section rings of polarised projective manifolds are asymptotically equivalent to sup-norms associated with metrics on the polarisation. As an application, we establish that over canonically polarised manifolds, convex hull of Narasimhan-Simha pseudonorm over pluricanonical sections is asymptotically equivalent to the sup-norm associated with the supercanonical metric of Tsuji, refining a result of Berman-Demailly. As another application, we deduce that the jumping measures associated with bounded submultiplicative filtrations on section rings converge to the spectral measures of their Bergman geodesic rays, generalizing previous results of Witt Nyström and Hisamoto. We show also that the latter measures can be described using pluripotential theory. More precisely, we establish that Bergman geodesic rays are maximal, i.e. they can be constructed through plurisubharmonic envelopes. As a final application, for non-continuous metrics on ample line bundles over projective manifolds, we prove that a weak version of semiclassical holomorphic extension theorem holds for generic submanifolds. This means that up to a negligible portion, the totality of holomorphic sections over generic submanifolds extends in an effective way to the ambient manifold. As an unexpected byproduct, we show that injective and projective tensor norms on symmetric algebras of finitely dimensional complex normed vector spaces are asymptotically equivalent.</p>
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