Source-pinned research

Research proof index

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This index contains 3 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.28.0

Mix m Ensemble pure average

Ensemble.mix_mEnsemble_pure_average

Plain-language statement

The average of f : MState d → T on an ensemble that mixes to a pure state ψ is f (pure ψ)

quantum informationentropyquantum channels

Source project: quantumInfo

Person-level attribution pending.

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Project-declaredLean 4.28.0

Mix p Ensemble pure average

Ensemble.mix_pEnsemble_pure_average

Plain-language statement

The average of f : Ket d → T on an ensemble that mixes to a pure state ψ is f ψ

quantum informationentropyquantum channels

Source project: quantumInfo

Person-level attribution pending.

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Project-declaredLean 4.28.0

Mix p Ensemble pure iff pure

Ensemble.mix_pEnsemble_pure_iff_pure

Project documentation

The average of f : MState d → T on a coerced pure-state ensemble ↑e : MEnsemble d α is equal to averaging the restricted function over Kets f ∘ pure : Ket d → T on e. -/ theorem average_of_pure_ensemble {T : Type _} {U : Type*} [AddCommGroup U] [Module ℝ U] [inst : Mixable U T] (f : MState d → T) (e : PEnsemble d α) : average f (toMEnsemble e) = p...

quantum informationentropyquantum channels

Source project: quantumInfo

Person-level attribution pending.

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