Theorems · Theorem · logic and foundations
Set.ncard_diff_singleton_add_one
Deprecated since 2026-06-03Use Set.ncard_sdiff_singleton_add_one instead.
∀ {α : Type u_1} {s : Set α} {a : α},
a ∈ s → autoParam s.Finite Set.ncard_sdiff_singleton_add_one._auto_1 → (s \ {a}).ncard + 1 = s.ncardAlias of Set.ncard_sdiff_singleton_add_one.
- Defined in
- Mathlib.Data.Set.Card
- Cited by
- 0 results in Mathlib
- Foundations
- Depth 100 from the axioms · uses propext, Classical.choice, Quot.sound
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- Setstatement · cited by 53,352
- Set.Finitestatement · cited by 1,814
- Set.ncardstatement · cited by 344
- Set.ncard_sdiff_singleton_add_oneproof · cited by 3
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