00Read later0Read MoreWhat does “for every c” mean in the sublevel set criterion for Borel measurability?Learn Math·Measurable-User·about 14 hours ago#OD4YjHaY#learnmath#redditlearnmath#borel#line#measurable+6 more🧰Tag tools✨Add tagI’m studying measure theory, and my lecture notes state the following result: Corollary 3.5. Let D be a Borel subset of ℝᵈ, and let f map D into the extended real line ℝ̄ = ℝ ∪ {−∞, +∞}.… Read more15s