Source-pinned research

Research proof index

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Project-declaredLean 4.33.0-rc1

Is Cadlag not acc Pt large Left Jump Set

IsCadlag.not_accPt_largeLeftJumpSet

Plain-language statement

The set of large left jump times has no accumulation points. TODO: maybe to_dual can be extended to simplify this proof as the proof of the second part is very similar to the first part.

probabilitystochastic processesmeasure theory

Source project: Brownian motion

Person-level attribution pending.

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Project-declaredLean 4.33.0-rc1

Is Compact System equiv

IsCompactSystem.equiv

Plain-language statement

Transport a compact system along an equivalence of types.

probabilitystochastic processesmeasure theory

Source project: Brownian motion

Person-level attribution pending.

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Project-declaredLean 4.33.0-rc1

Limsup le of eventually monotone of tendsto on dense

limsup_le_of_eventually_monotone_of_tendsto_on_dense

Plain-language statement

Convergence on a dense set of a collection of monotone function controls the limsup at a point if f is right continuous at a. We prove this under the assumption that α has both a bottom element and a top element. The bottom element is needed because otherwise limsup evaluated at the bottome element may give a junk value to break the inequality.

probabilitystochastic processesmeasure theory

Source project: Brownian motion

Person-level attribution pending.

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