prod — Mathlib

English

The binary product of measures is defined (and behaves well under s-finite assumptions).

Русский

Две меры образуют произведение; определение и свойства под условием s-финитности.

LaTeX

$$$\\text{prod}(\\mu,\\nu) = \\mu \\otimes \\nu$ (определено при условиях s-фinite).$$$

Lean4

/-- The binary product of measures. They are defined for arbitrary measures, but we basically
  prove all properties under the assumption that at least one of them is s-finite. -/
def prod :=
  val_proj @wrapped✝.{}

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