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C03.1 · Prerequisites

Section of C03.1 — From Jordan boundary to Freudenthal bulk and exceptional representation. Section object E-C03.1.prerequisites · kind PROSE · cites no record · attestation inherited from the article (R69).

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The split Albert algebra and its trace form from C02.1; the adjoint from C02.2; elementary symplectic linear algebra. A Lagrangian subspace is maximal isotropic for an alternating form, not a positive subspace for a symmetric metric. An identification of two cubic tensors is also different from selecting a point in either carrier.

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