singularPart — Mathlib

English

For all a and x, rnDeriv κ η a x = ∞ if and only if (a,x) is in the mutually singular set κ η.

Русский

Для всех a и x, rnDeriv κ η a x = ∞ тогда и только тогда, когда (a,x) ∈ κ.mutuallySingularSet η.

LaTeX

$$$ rnDeriv(\kappa, \eta)\ a\ x = \infty \iff (a, x) \in \text{mutuallySingularSet}(\kappa, \eta)$$$

Lean4

/-- Singular part of the kernel `κ` with respect to the kernel `η`. -/
noncomputable def singularPart :=
  val_proj @wrapped✝.{}

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