Corollary33.0.40 (Sufficient conditions for the global pairing identity): the primal pairing and genuine-adjoint pairing agree everywhere if either the primal domain is full, or the graph function is convex-closed and the genuine adjoint domain is full.
Helper for Corollary33.0.41: a proper first convex-bifunction domain component omits some primal parameter.
Helper for Corollary33.0.41: a proper second convex-bifunction domain component omits some dual vector.
Helper for Corollary33.0.41: the inner-product equation fails at any point lying outside both convex-bifunction domain components.
Corollary33.0.41 (Failure when both domains are not full): if neither the primal domain nor the genuine adjoint domain is all of space, then the global pairing identity cannot hold.
Helper for Theorem33.0.39: the genuine inner-product equation forces at least one of the two domain components to be all of space.
Helper for Corollary33.3.1: a closed convex witness with no ⊥ values already supplies
the Rockafellar convexity and graph-closure data needed by the coordinatewise-closure
machinery.
Helper for Corollary33.3.1: a closed convex bifunction witness with no ⊥ values forces
the canonical coordinatewise closure identities for the represented pairing kernels.
Helper for Corollary33.3.1: the forward implication only uses the packaged closed convex witness data, so it can be invoked directly from the existential interface used in the corollary statement.
Helper for Corollary33.3.1: the unique-existence hypothesis in the corollary statement still yields the same coordinatewise closure pair after discarding uniqueness.
Helper for Corollary33.3.2: simultaneous concave-convex and convex-concave structure on a kernel makes every first-variable section simultaneously concave and convex.
Helper for Corollary33.3.2: simultaneous concave-convex and convex-concave structure on a kernel makes every second-variable section simultaneously convex and concave.
Helper for Corollary33.3.2: the simultaneous orientation hypotheses package the first-variable section orientations uniformly over all frozen dual vectors.
Helper for Corollary33.3.2: the simultaneous orientation hypotheses package the second-variable section orientations uniformly over all frozen primal vectors.
Helper for Corollary33.3.2: simultaneous concave-convex and convex-concave structure on a kernel packages both first-variable and second-variable section orientations at once.
Helper for Corollary33.3.3: a real-valued kernel, viewed in EReal, satisfies both
one-sided finiteness conventions required by the saddle-function correspondence.
Helper for Corollary33.3.3: every lower simple extension lies pointwise below the corresponding upper simple extension.
Helper for Corollary33.3.3: on C × D, the simple extensions of a real-valued kernel
agree with the original kernel after coercion to EReal.
Helper for Corollary33.3.3: the EReal simple extensions of a real kernel are globally
ordered, and on C × D they both reduce to the original real kernel after coercion.
Helper for Corollary33.3.3: once the lower and upper simple extensions are identified as the expected coordinatewise closure pair, their lower-closedness, upper-closedness, and pointwise order follow formally from the Section 33 closure machinery already available in this split file.
Helper for Corollary33.3.3: the lower simple extension of a real-valued kernel has
exactly the original primal constraint set as the locus where some value is not ⊥.
Helper for Corollary33.3.3: the upper simple extension of a real-valued kernel has exactly
the original dual constraint set as the locus where some value is not ⊤.
Helper for Corollary33.3.3: the two real-valued simple extensions recover exactly the original primal and dual constraint sets as their non-infinite slice domains.
Helper for Corollary33.3.3: outside the primal constraint set C, the upper simple
extension freezes to the top/bottom indicator of the dual constraint set D.
Helper for Corollary33.3.3: an off-C section of the upper simple extension attains ⊥
on D and ⊤ off D.
Helper for Corollary33.3.3: if one primal point lies in C, another lies outside C,
and their midpoint returns to C, then freezing the upper simple extension at a dual point of
D produces a first-variable section that is not convex on all of ℝ^m.
Helper for Corollary33.3.3: the midpoint witness above already rules out the
convex-concave orientation for the upper simple extension on all of ℝ^m × ℝ^n.
Helper for Corollary33.3.3: once the midpoint witness rules out the global
convex-concave orientation of the upper simple extension, the right-hand branch in the
definition of IsUpperClosedSaddleFunction is impossible as well.
Helper for Corollary33.3.3: any proof of upper closedness must choose one of the two closure branches, so refuting both branches separately refutes upper closedness itself.
Helper for Corollary33.3.3: the canonical witness is obtained by taking the sectionwise convex conjugate of the lower simple extension.
Equations
Instances For
Helper for Corollary33.3.3: outside the primal constraint set C, the canonical witness
section is constantly ⊤.