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Add massOn empty simp lemma#4

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Xinze-Li-Moqian merged 1 commit into
MathNetwork:mainfrom
dxww123:codex/varifold-masson-empty
May 13, 2026
Merged

Add massOn empty simp lemma#4
Xinze-Li-Moqian merged 1 commit into
MathNetwork:mainfrom
dxww123:codex/varifold-masson-empty

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@dxww123 dxww123 commented May 12, 2026

Summary

Adds a small localized-mass API lemma for varifolds:

  • @[simp] theorem Varifold.massOn_empty
  • marks the existing Varifold.massOn_univ theorem as @[simp]

This is a small follow-up to the zero-varifold API and makes massOn normalize on the two basic sets.

Validation

  • lake build OpenGALib.GeometricMeasureTheory.Varifold
  • lake build

@Xinze-Li-Moqian Xinze-Li-Moqian merged commit 1034dbc into MathNetwork:main May 13, 2026
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2 participants