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Theorem List for Metamath Proof Explorer - 30701-30800   *Has distinct variable group(s)
TypeLabelDescription
Statement
 
Theoremmdslmd2i 30701 Preservation of the modular pair property in the one-to-one onto mapping between the two sublattices in Lemma 1.3 of [MaedaMaeda] p. 2 (join version). (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶C    &   𝐷C       (((𝐴 𝑀 𝐵𝐵 𝑀* 𝐴) ∧ ((𝐴𝐵) ⊆ (𝐶𝐷) ∧ (𝐶 𝐷) ⊆ 𝐵)) → (𝐶 𝑀 𝐷 ↔ (𝐶 𝐴) 𝑀 (𝐷 𝐴)))
 
Theoremmdsldmd1i 30702 Preservation of the dual modular pair property in the one-to-one onto mapping between the two sublattices in Lemma 1.3 of [MaedaMaeda] p. 2. (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶C    &   𝐷C       (((𝐴 𝑀 𝐵𝐵 𝑀* 𝐴) ∧ (𝐴 ⊆ (𝐶𝐷) ∧ (𝐶 𝐷) ⊆ (𝐴 𝐵))) → (𝐶 𝑀* 𝐷 ↔ (𝐶𝐵) 𝑀* (𝐷𝐵)))
 
Theoremmdslmd3i 30703 Modular pair conditions that imply the modular pair property in a sublattice. Lemma 1.5.1 of [MaedaMaeda] p. 2. (Contributed by NM, 23-Dec-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶C    &   𝐷C       (((𝐴 𝑀 𝐵 ∧ (𝐴𝐵) 𝑀 𝐶) ∧ ((𝐴𝐶) ⊆ 𝐷𝐷𝐴)) → 𝐷 𝑀 (𝐵𝐶))
 
Theoremmdslmd4i 30704 Modular pair condition that implies the modular pair property in a sublattice. Lemma 1.5.2 of [MaedaMaeda] p. 2. (Contributed by NM, 24-Dec-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶C    &   𝐷C       ((𝐴 𝑀 𝐵 ∧ ((𝐴𝐵) ⊆ 𝐶𝐶𝐴) ∧ ((𝐴𝐵) ⊆ 𝐷𝐷𝐵)) → 𝐶 𝑀 𝐷)
 
Theoremcsmdsymi 30705* Cross-symmetry implies M-symmetry. Theorem 1.9.1 of [MaedaMaeda] p. 3. (Contributed by NM, 24-Dec-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C       ((∀𝑐C (𝑐 𝑀 𝐵𝐵 𝑀* 𝑐) ∧ 𝐴 𝑀 𝐵) → 𝐵 𝑀 𝐴)
 
Theoremmdexchi 30706 An exchange lemma for modular pairs. Lemma 1.6 of [MaedaMaeda] p. 2. (Contributed by NM, 22-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶C       ((𝐴 𝑀 𝐵𝐶 𝑀 (𝐴 𝐵) ∧ (𝐶 ∩ (𝐴 𝐵)) ⊆ 𝐴) → ((𝐶 𝐴) 𝑀 𝐵 ∧ ((𝐶 𝐴) ∩ 𝐵) = (𝐴𝐵)))
 
Theoremcvmd 30707 The covering property implies the modular pair property. Lemma 7.5.1 of [MaedaMaeda] p. 31. (Contributed by NM, 21-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵C ∧ (𝐴𝐵) ⋖ 𝐵) → 𝐴 𝑀 𝐵)
 
Theoremcvdmd 30708 The covering property implies the dual modular pair property. Lemma 7.5.2 of [MaedaMaeda] p. 31. (Contributed by NM, 21-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵C𝐵 (𝐴 𝐵)) → 𝐴 𝑀* 𝐵)
 
19.8.2  Atoms
 
Definitiondf-at 30709 Define the set of atoms in a Hilbert lattice. An atom is a nonzero element of a lattice such that anything less than it is zero, i.e. it is the smallest nonzero element of the lattice. Definition of atom in [Kalmbach] p. 15. See ela 30710 and elat2 30711 for membership relations. (Contributed by NM, 14-Aug-2002.) (New usage is discouraged.)
HAtoms = {𝑥C ∣ 0 𝑥}
 
Theoremela 30710 Atoms in a Hilbert lattice are the elements that cover the zero subspace. Definition of atom in [Kalmbach] p. 15. (Contributed by NM, 9-Jun-2004.) (New usage is discouraged.)
(𝐴 ∈ HAtoms ↔ (𝐴C ∧ 0 𝐴))
 
Theoremelat2 30711* Expanded membership relation for the set of atoms, i.e. the predicate "is an atom (of the Hilbert lattice)." An atom is a nonzero element of a lattice such that anything less than it is zero, i.e. it is the smallest nonzero element of the lattice. (Contributed by NM, 9-Jun-2004.) (New usage is discouraged.)
(𝐴 ∈ HAtoms ↔ (𝐴C ∧ (𝐴 ≠ 0 ∧ ∀𝑥C (𝑥𝐴 → (𝑥 = 𝐴𝑥 = 0)))))
 
Theoremelatcv0 30712 A Hilbert lattice element is an atom iff it covers the zero subspace. (Contributed by NM, 26-Jun-2004.) (New usage is discouraged.)
(𝐴C → (𝐴 ∈ HAtoms ↔ 0 𝐴))
 
Theorematcv0 30713 An atom covers the zero subspace. (Contributed by NM, 26-Jun-2004.) (New usage is discouraged.)
(𝐴 ∈ HAtoms → 0 𝐴)
 
Theorematssch 30714 Atoms are a subset of the Hilbert lattice. (Contributed by NM, 14-Aug-2002.) (New usage is discouraged.)
HAtoms ⊆ C
 
Theorematelch 30715 An atom is a Hilbert lattice element. (Contributed by NM, 22-Jun-2004.) (New usage is discouraged.)
(𝐴 ∈ HAtoms → 𝐴C )
 
Theorematne0 30716 An atom is not the Hilbert lattice zero. (Contributed by NM, 13-Aug-2002.) (New usage is discouraged.)
(𝐴 ∈ HAtoms → 𝐴 ≠ 0)
 
Theorematss 30717 A lattice element smaller than an atom is either the atom or zero. (Contributed by NM, 25-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → (𝐴𝐵 → (𝐴 = 𝐵𝐴 = 0)))
 
Theorematsseq 30718 Two atoms in a subset relationship are equal. (Contributed by NM, 26-Jun-2004.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵 ∈ HAtoms) → (𝐴𝐵𝐴 = 𝐵))
 
Theorematcveq0 30719 A Hilbert lattice element covered by an atom must be the zero subspace. (Contributed by NM, 11-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → (𝐴 𝐵𝐴 = 0))
 
Theoremh1da 30720 A 1-dimensional subspace is an atom. (Contributed by NM, 22-Jul-2001.) (New usage is discouraged.)
((𝐴 ∈ ℋ ∧ 𝐴 ≠ 0) → (⊥‘(⊥‘{𝐴})) ∈ HAtoms)
 
Theoremspansna 30721 The span of the singleton of a vector is an atom. (Contributed by NM, 18-Dec-2004.) (New usage is discouraged.)
((𝐴 ∈ ℋ ∧ 𝐴 ≠ 0) → (span‘{𝐴}) ∈ HAtoms)
 
Theoremsh1dle 30722 A 1-dimensional subspace is less than or equal to any subspace containing its generating vector. (Contributed by NM, 24-Nov-2004.) (New usage is discouraged.)
((𝐴S𝐵𝐴) → (⊥‘(⊥‘{𝐵})) ⊆ 𝐴)
 
Theoremch1dle 30723 A 1-dimensional subspace is less than or equal to any member of C containing its generating vector. (Contributed by NM, 30-May-2004.) (New usage is discouraged.)
((𝐴C𝐵𝐴) → (⊥‘(⊥‘{𝐵})) ⊆ 𝐴)
 
Theorematom1d 30724* The 1-dimensional subspaces of Hilbert space are its atoms. Part of Remark 10.3.5 of [BeltramettiCassinelli] p. 107. (Contributed by NM, 4-Jun-2004.) (New usage is discouraged.)
(𝐴 ∈ HAtoms ↔ ∃𝑥 ∈ ℋ (𝑥 ≠ 0𝐴 = (span‘{𝑥})))
 
19.8.3  Superposition principle
 
Theoremsuperpos 30725* Superposition Principle. If 𝐴 and 𝐵 are distinct atoms, there exists a third atom, distinct from 𝐴 and 𝐵, that is the superposition of 𝐴 and 𝐵. Definition 3.4-3(a) in [MegPav2000] p. 2345 (PDF p. 8). (Contributed by NM, 9-Jun-2006.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵 ∈ HAtoms ∧ 𝐴𝐵) → ∃𝑥 ∈ HAtoms (𝑥𝐴𝑥𝐵𝑥 ⊆ (𝐴 𝐵)))
 
19.8.4  Atoms, exchange and covering properties, atomicity
 
Theoremchcv1 30726 The Hilbert lattice has the covering property. Proposition 1(ii) of [Kalmbach] p. 140 (and its converse). (Contributed by NM, 11-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → (¬ 𝐵𝐴𝐴 (𝐴 𝐵)))
 
Theoremchcv2 30727 The Hilbert lattice has the covering property. (Contributed by NM, 11-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → (𝐴 ⊊ (𝐴 𝐵) ↔ 𝐴 (𝐴 𝐵)))
 
Theoremchjatom 30728 The join of a closed subspace and an atom equals their subspace sum. Special case of remark in [Kalmbach] p. 65, stating that if 𝐴 or 𝐵 is finite-dimensional, then this equality holds. (Contributed by NM, 4-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → (𝐴 + 𝐵) = (𝐴 𝐵))
 
Theoremshatomici 30729* The lattice of Hilbert subspaces is atomic, i.e. any nonzero element is greater than or equal to some atom. Part of proof of Theorem 16.9 of [MaedaMaeda] p. 70. (Contributed by NM, 24-Nov-2004.) (New usage is discouraged.)
𝐴S       (𝐴 ≠ 0 → ∃𝑥 ∈ HAtoms 𝑥𝐴)
 
Theoremhatomici 30730* The Hilbert lattice is atomic, i.e. any nonzero element is greater than or equal to some atom. Remark in [Kalmbach] p. 140. (Contributed by NM, 22-Jul-2001.) (New usage is discouraged.)
𝐴C       (𝐴 ≠ 0 → ∃𝑥 ∈ HAtoms 𝑥𝐴)
 
Theoremhatomic 30731* A Hilbert lattice is atomic, i.e. any nonzero element is greater than or equal to some atom. Remark in [Kalmbach] p. 140. Also Definition 3.4-2 in [MegPav2000] p. 2345 (PDF p. 8). (Contributed by NM, 24-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐴 ≠ 0) → ∃𝑥 ∈ HAtoms 𝑥𝐴)
 
Theoremshatomistici 30732* The lattice of Hilbert subspaces is atomistic, i.e. any element is the supremum of its atoms. Part of proof of Theorem 16.9 of [MaedaMaeda] p. 70. (Contributed by NM, 26-Nov-2004.) (New usage is discouraged.)
𝐴S       𝐴 = (span‘ {𝑥 ∈ HAtoms ∣ 𝑥𝐴})
 
Theoremhatomistici 30733* C is atomistic, i.e. any element is the supremum of its atoms. Remark in [Kalmbach] p. 140. (Contributed by NM, 14-Aug-2002.) (New usage is discouraged.)
𝐴C       𝐴 = ( ‘{𝑥 ∈ HAtoms ∣ 𝑥𝐴})
 
Theoremchpssati 30734* Two Hilbert lattice elements in a proper subset relationship imply the existence of an atom less than or equal to one but not the other. (Contributed by NM, 10-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴𝐵 → ∃𝑥 ∈ HAtoms (𝑥𝐵 ∧ ¬ 𝑥𝐴))
 
Theoremchrelati 30735* The Hilbert lattice is relatively atomic. Remark 2 of [Kalmbach] p. 149. (Contributed by NM, 11-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴𝐵 → ∃𝑥 ∈ HAtoms (𝐴 ⊊ (𝐴 𝑥) ∧ (𝐴 𝑥) ⊆ 𝐵))
 
Theoremchrelat2i 30736* A consequence of relative atomicity. (Contributed by NM, 30-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       𝐴𝐵 ↔ ∃𝑥 ∈ HAtoms (𝑥𝐴 ∧ ¬ 𝑥𝐵))
 
Theoremcvati 30737* If a Hilbert lattice element covers another, it equals the other joined with some atom. This is a consequence of the relative atomicity of Hilbert space. (Contributed by NM, 30-Nov-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝐵 → ∃𝑥 ∈ HAtoms (𝐴 𝑥) = 𝐵)
 
Theoremcvbr4i 30738* An alternate way to express the covering property. (Contributed by NM, 30-Nov-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝐵 ↔ (𝐴𝐵 ∧ ∃𝑥 ∈ HAtoms (𝐴 𝑥) = 𝐵))
 
Theoremcvexchlem 30739 Lemma for cvexchi 30740. (Contributed by NM, 10-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       ((𝐴𝐵) ⋖ 𝐵𝐴 (𝐴 𝐵))
 
Theoremcvexchi 30740 The Hilbert lattice satisfies the exchange axiom. Proposition 1(iii) of [Kalmbach] p. 140 and its converse. Originally proved by Garrett Birkhoff in 1933. (Contributed by NM, 12-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       ((𝐴𝐵) ⋖ 𝐵𝐴 (𝐴 𝐵))
 
Theoremchrelat2 30741* A consequence of relative atomicity. (Contributed by NM, 1-Jul-2004.) (New usage is discouraged.)
((𝐴C𝐵C ) → (¬ 𝐴𝐵 ↔ ∃𝑥 ∈ HAtoms (𝑥𝐴 ∧ ¬ 𝑥𝐵)))
 
Theoremchrelat3 30742* A consequence of relative atomicity. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
((𝐴C𝐵C ) → (𝐴𝐵 ↔ ∀𝑥 ∈ HAtoms (𝑥𝐴𝑥𝐵)))
 
Theoremchrelat3i 30743* A consequence of the relative atomicity of Hilbert space: the ordering of Hilbert lattice elements is completely determined by the atoms they majorize. (Contributed by NM, 30-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴𝐵 ↔ ∀𝑥 ∈ HAtoms (𝑥𝐴𝑥𝐵))
 
Theoremchrelat4i 30744* A consequence of relative atomicity. Extensionality principle: two lattice elements are equal iff they majorize the same atoms. (Contributed by NM, 30-Jun-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 = 𝐵 ↔ ∀𝑥 ∈ HAtoms (𝑥𝐴𝑥𝐵))
 
Theoremcvexch 30745 The Hilbert lattice satisfies the exchange axiom. Proposition 1(iii) of [Kalmbach] p. 140 and its converse. Originally proved by Garrett Birkhoff in 1933. (Contributed by NM, 21-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵C ) → ((𝐴𝐵) ⋖ 𝐵𝐴 (𝐴 𝐵)))
 
Theoremcvp 30746 The Hilbert lattice satisfies the covering property of Definition 7.4 of [MaedaMaeda] p. 31 and its converse. (Contributed by NM, 21-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → ((𝐴𝐵) = 0𝐴 (𝐴 𝐵)))
 
Theorematnssm0 30747 The meet of a Hilbert lattice element and an incomparable atom is the zero subspace. (Contributed by NM, 30-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → (¬ 𝐵𝐴 ↔ (𝐴𝐵) = 0))
 
Theorematnemeq0 30748 The meet of distinct atoms is the zero subspace. (Contributed by NM, 25-Jun-2004.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵 ∈ HAtoms) → (𝐴𝐵 ↔ (𝐴𝐵) = 0))
 
Theorematssma 30749 The meet with an atom's superset is the atom. (Contributed by NM, 12-Jun-2006.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵C ) → (𝐴𝐵 ↔ (𝐴𝐵) ∈ HAtoms))
 
Theorematcv0eq 30750 Two atoms covering the zero subspace are equal. (Contributed by NM, 26-Jun-2004.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵 ∈ HAtoms) → (0 (𝐴 𝐵) ↔ 𝐴 = 𝐵))
 
Theorematcv1 30751 Two atoms covering the zero subspace are equal. (Contributed by NM, 26-Jun-2004.) (New usage is discouraged.)
(((𝐴C𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) ∧ 𝐴 (𝐵 𝐶)) → (𝐴 = 0𝐵 = 𝐶))
 
Theorematexch 30752 The Hilbert lattice satisfies the atom exchange property. Proposition 1(i) of [Kalmbach] p. 140. A version of this theorem related to vector analysis was originally proved by Hermann Grassmann in 1862. Also Definition 3.4-3(b) in [MegPav2000] p. 2345 (PDF p. 8) (use atnemeq0 30748 to obtain atom inequality). (Contributed by NM, 27-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) → ((𝐵 ⊆ (𝐴 𝐶) ∧ (𝐴𝐵) = 0) → 𝐶 ⊆ (𝐴 𝐵)))
 
Theorematomli 30753 An assertion holding in atomic orthomodular lattices that is equivalent to the exchange axiom. Proposition 3.2.17 of [PtakPulmannova] p. 66. (Contributed by NM, 24-Jun-2004.) (New usage is discouraged.)
𝐴C       (𝐵 ∈ HAtoms → ((𝐴 𝐵) ∩ (⊥‘𝐴)) ∈ (HAtoms ∪ {0}))
 
Theorematoml2i 30754 An assertion holding in atomic orthomodular lattices that is equivalent to the exchange axiom. Proposition P8(ii) of [BeltramettiCassinelli1] p. 400. (Contributed by NM, 12-Jun-2006.) (New usage is discouraged.)
𝐴C       ((𝐵 ∈ HAtoms ∧ ¬ 𝐵𝐴) → ((𝐴 𝐵) ∩ (⊥‘𝐴)) ∈ HAtoms)
 
Theorematordi 30755 An ordering law for a Hilbert lattice atom and a commuting subspace. (Contributed by NM, 12-Jun-2006.) (New usage is discouraged.)
𝐴C       ((𝐵 ∈ HAtoms ∧ 𝐴 𝐶 𝐵) → (𝐵𝐴𝐵 ⊆ (⊥‘𝐴)))
 
Theorematcvatlem 30756 Lemma for atcvati 30757. (Contributed by NM, 27-Jun-2004.) (New usage is discouraged.)
𝐴C       (((𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) ∧ (𝐴 ≠ 0𝐴 ⊊ (𝐵 𝐶))) → (¬ 𝐵𝐴𝐴 ∈ HAtoms))
 
Theorematcvati 30757 A nonzero Hilbert lattice element less than the join of two atoms is an atom. (Contributed by NM, 28-Jun-2004.) (New usage is discouraged.)
𝐴C       ((𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) → ((𝐴 ≠ 0𝐴 ⊊ (𝐵 𝐶)) → 𝐴 ∈ HAtoms))
 
Theorematcvat2i 30758 A Hilbert lattice element covered by the join of two distinct atoms is an atom. (Contributed by NM, 26-Jun-2004.) (New usage is discouraged.)
𝐴C       ((𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) → ((¬ 𝐵 = 𝐶𝐴 (𝐵 𝐶)) → 𝐴 ∈ HAtoms))
 
Theorematord 30759 An ordering law for a Hilbert lattice atom and a commuting subspace. (Contributed by NM, 12-Jun-2006.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms ∧ 𝐴 𝐶 𝐵) → (𝐵𝐴𝐵 ⊆ (⊥‘𝐴)))
 
Theorematcvat2 30760 A Hilbert lattice element covered by the join of two distinct atoms is an atom. (Contributed by NM, 29-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) → ((¬ 𝐵 = 𝐶𝐴 (𝐵 𝐶)) → 𝐴 ∈ HAtoms))
 
19.8.5  Irreducibility
 
Theoremchirredlem1 30761* Lemma for chirredi 30765. (Contributed by NM, 14-Jun-2006.) (New usage is discouraged.)
𝐴C       (((𝑝 ∈ HAtoms ∧ (𝑞C𝑞 ⊆ (⊥‘𝐴))) ∧ ((𝑟 ∈ HAtoms ∧ 𝑟𝐴) ∧ 𝑟 ⊆ (𝑝 𝑞))) → (𝑝 ∩ (⊥‘𝑟)) = 0)
 
Theoremchirredlem2 30762* Lemma for chirredi 30765. (Contributed by NM, 15-Jun-2006.) (New usage is discouraged.)
𝐴C       ((((𝑝 ∈ HAtoms ∧ 𝑝𝐴) ∧ (𝑞C𝑞 ⊆ (⊥‘𝐴))) ∧ ((𝑟 ∈ HAtoms ∧ 𝑟𝐴) ∧ 𝑟 ⊆ (𝑝 𝑞))) → ((⊥‘𝑟) ∩ (𝑝 𝑞)) = 𝑞)
 
Theoremchirredlem3 30763* Lemma for chirredi 30765. (Contributed by NM, 15-Jun-2006.) (New usage is discouraged.)
𝐴C    &   (𝑥C𝐴 𝐶 𝑥)       ((((𝑝 ∈ HAtoms ∧ 𝑝𝐴) ∧ (𝑞 ∈ HAtoms ∧ 𝑞 ⊆ (⊥‘𝐴))) ∧ (𝑟 ∈ HAtoms ∧ 𝑟 ⊆ (𝑝 𝑞))) → (𝑟𝐴𝑟 = 𝑝))
 
Theoremchirredlem4 30764* Lemma for chirredi 30765. (Contributed by NM, 15-Jun-2006.) (New usage is discouraged.)
𝐴C    &   (𝑥C𝐴 𝐶 𝑥)       ((((𝑝 ∈ HAtoms ∧ 𝑝𝐴) ∧ (𝑞 ∈ HAtoms ∧ 𝑞 ⊆ (⊥‘𝐴))) ∧ (𝑟 ∈ HAtoms ∧ 𝑟 ⊆ (𝑝 𝑞))) → (𝑟 = 𝑝𝑟 = 𝑞))
 
Theoremchirredi 30765* The Hilbert lattice is irreducible: any element that commutes with all elements must be zero or one. Theorem 14.8.4 of [BeltramettiCassinelli] p. 166. (Contributed by NM, 15-Jun-2006.) (New usage is discouraged.)
𝐴C    &   (𝑥C𝐴 𝐶 𝑥)       (𝐴 = 0𝐴 = ℋ)
 
Theoremchirred 30766* The Hilbert lattice is irreducible: any element that commutes with all elements must be zero or one. Theorem 14.8.4 of [BeltramettiCassinelli] p. 166. (Contributed by NM, 16-Jun-2006.) (New usage is discouraged.)
((𝐴C ∧ ∀𝑥C 𝐴 𝐶 𝑥) → (𝐴 = 0𝐴 = ℋ))
 
19.8.6  Atoms (cont.)
 
Theorematcvat3i 30767 A condition implying that a certain lattice element is an atom. Part of Lemma 3.2.20 of [PtakPulmannova] p. 68. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
𝐴C       ((𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) → (((¬ 𝐵 = 𝐶 ∧ ¬ 𝐶𝐴) ∧ 𝐵 ⊆ (𝐴 𝐶)) → (𝐴 ∩ (𝐵 𝐶)) ∈ HAtoms))
 
Theorematcvat4i 30768* A condition implying existence of an atom with the properties shown. Lemma 3.2.20 of [PtakPulmannova] p. 68. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
𝐴C       ((𝐵 ∈ HAtoms ∧ 𝐶 ∈ HAtoms) → ((𝐴 ≠ 0𝐵 ⊆ (𝐴 𝐶)) → ∃𝑥 ∈ HAtoms (𝑥𝐴𝐵 ⊆ (𝐶 𝑥))))
 
Theorematdmd 30769 Two Hilbert lattice elements have the dual modular pair property if the first is an atom. Theorem 7.6(c) of [MaedaMaeda] p. 31. (Contributed by NM, 22-Jun-2004.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵C ) → 𝐴 𝑀* 𝐵)
 
Theorematmd 30770 Two Hilbert lattice elements have the modular pair property if the first is an atom. Theorem 7.6(b) of [MaedaMaeda] p. 31. (Contributed by NM, 22-Jun-2004.) (New usage is discouraged.)
((𝐴 ∈ HAtoms ∧ 𝐵C ) → 𝐴 𝑀 𝐵)
 
Theorematmd2 30771 Two Hilbert lattice elements have the dual modular pair property if the second is an atom. Part of Exercise 6 of [Kalmbach] p. 103. (Contributed by NM, 22-Jun-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → 𝐴 𝑀 𝐵)
 
Theorematabsi 30772 Absorption of an incomparable atom. Similar to Exercise 7.1 of [MaedaMaeda] p. 34. (Contributed by NM, 15-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐶 ∈ HAtoms → (¬ 𝐶 ⊆ (𝐴 𝐵) → ((𝐴 𝐶) ∩ 𝐵) = (𝐴𝐵)))
 
Theorematabs2i 30773 Absorption of an incomparable atom. (Contributed by NM, 18-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐶 ∈ HAtoms → (¬ 𝐶 ⊆ (𝐴 𝐵) → ((𝐴 𝐶) ∩ (𝐴 𝐵)) = 𝐴))
 
19.8.7  Modular symmetry
 
Theoremmdsymlem1 30774* Lemma for mdsymi 30782. (Contributed by NM, 1-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       (((𝑝C ∧ (𝐵𝐶) ⊆ 𝐴) ∧ (𝐵 𝑀* 𝐴𝑝 ⊆ (𝐴 𝐵))) → 𝑝𝐴)
 
Theoremmdsymlem2 30775* Lemma for mdsymi 30782. (Contributed by NM, 1-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       (((𝑝 ∈ HAtoms ∧ (𝐵𝐶) ⊆ 𝐴) ∧ (𝐵 𝑀* 𝐴𝑝 ⊆ (𝐴 𝐵))) → (𝐵 ≠ 0 → ∃𝑟 ∈ HAtoms ∃𝑞 ∈ HAtoms (𝑝 ⊆ (𝑞 𝑟) ∧ (𝑞𝐴𝑟𝐵))))
 
Theoremmdsymlem3 30776* Lemma for mdsymi 30782. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       ((((𝑝 ∈ HAtoms ∧ ¬ (𝐵𝐶) ⊆ 𝐴) ∧ 𝑝 ⊆ (𝐴 𝐵)) ∧ 𝐴 ≠ 0) → ∃𝑟 ∈ HAtoms ∃𝑞 ∈ HAtoms (𝑝 ⊆ (𝑞 𝑟) ∧ (𝑞𝐴𝑟𝐵)))
 
Theoremmdsymlem4 30777* Lemma for mdsymi 30782. This is the forward direction of Lemma 4(i) of [Maeda] p. 168. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       (𝑝 ∈ HAtoms → ((𝐵 𝑀* 𝐴 ∧ ((𝐴 ≠ 0𝐵 ≠ 0) ∧ 𝑝 ⊆ (𝐴 𝐵))) → ∃𝑞 ∈ HAtoms ∃𝑟 ∈ HAtoms (𝑝 ⊆ (𝑞 𝑟) ∧ (𝑞𝐴𝑟𝐵))))
 
Theoremmdsymlem5 30778* Lemma for mdsymi 30782. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       ((𝑞 ∈ HAtoms ∧ 𝑟 ∈ HAtoms) → (¬ 𝑞 = 𝑝 → ((𝑝 ⊆ (𝑞 𝑟) ∧ (𝑞𝐴𝑟𝐵)) → (((𝑐C𝐴𝑐) ∧ 𝑝 ∈ HAtoms) → (𝑝𝑐𝑝 ⊆ ((𝑐𝐵) ∨ 𝐴))))))
 
Theoremmdsymlem6 30779* Lemma for mdsymi 30782. This is the converse direction of Lemma 4(i) of [Maeda] p. 168, and is based on the proof of Theorem 1(d) to (e) of [Maeda] p. 167. (Contributed by NM, 2-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       (∀𝑝 ∈ HAtoms (𝑝 ⊆ (𝐴 𝐵) → ∃𝑞 ∈ HAtoms ∃𝑟 ∈ HAtoms (𝑝 ⊆ (𝑞 𝑟) ∧ (𝑞𝐴𝑟𝐵))) → 𝐵 𝑀* 𝐴)
 
Theoremmdsymlem7 30780* Lemma for mdsymi 30782. Lemma 4(i) of [Maeda] p. 168. Note that Maeda's 1965 definition of dual modular pair has reversed arguments compared to the later (1970) definition given in Remark 29.6 of [MaedaMaeda] p. 130, which is the one that we use. (Contributed by NM, 3-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       ((𝐴 ≠ 0𝐵 ≠ 0) → (𝐵 𝑀* 𝐴 ↔ ∀𝑝 ∈ HAtoms (𝑝 ⊆ (𝐴 𝐵) → ∃𝑞 ∈ HAtoms ∃𝑟 ∈ HAtoms (𝑝 ⊆ (𝑞 𝑟) ∧ (𝑞𝐴𝑟𝐵)))))
 
Theoremmdsymlem8 30781* Lemma for mdsymi 30782. Lemma 4(ii) of [Maeda] p. 168. (Contributed by NM, 3-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C    &   𝐶 = (𝐴 𝑝)       ((𝐴 ≠ 0𝐵 ≠ 0) → (𝐵 𝑀* 𝐴𝐴 𝑀* 𝐵))
 
Theoremmdsymi 30782 M-symmetry of the Hilbert lattice. Lemma 5 of [Maeda] p. 168. (Contributed by NM, 3-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝑀 𝐵𝐵 𝑀 𝐴)
 
Theoremmdsym 30783 M-symmetry of the Hilbert lattice. Lemma 5 of [Maeda] p. 168. (Contributed by NM, 6-Jul-2004.) (New usage is discouraged.)
((𝐴C𝐵C ) → (𝐴 𝑀 𝐵𝐵 𝑀 𝐴))
 
Theoremdmdsym 30784 Dual M-symmetry of the Hilbert lattice. (Contributed by NM, 25-Jul-2007.) (New usage is discouraged.)
((𝐴C𝐵C ) → (𝐴 𝑀* 𝐵𝐵 𝑀* 𝐴))
 
Theorematdmd2 30785 Two Hilbert lattice elements have the dual modular pair property if the second is an atom. (Contributed by NM, 6-Jul-2004.) (New usage is discouraged.)
((𝐴C𝐵 ∈ HAtoms) → 𝐴 𝑀* 𝐵)
 
Theoremsumdmdii 30786 If the subspace sum of two Hilbert lattice elements is closed, then the elements are a dual modular pair. Remark in [MaedaMaeda] p. 139. (Contributed by NM, 12-Jul-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       ((𝐴 + 𝐵) = (𝐴 𝐵) → 𝐴 𝑀* 𝐵)
 
Theoremcmmdi 30787 Commuting subspaces form a modular pair. (Contributed by NM, 16-Jan-2005.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝐶 𝐵𝐴 𝑀 𝐵)
 
Theoremcmdmdi 30788 Commuting subspaces form a dual modular pair. (Contributed by NM, 25-Apr-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝐶 𝐵𝐴 𝑀* 𝐵)
 
Theoremsumdmdlem 30789 Lemma for sumdmdi 30791. The span of vector 𝐶 not in the subspace sum is "trimmed off." (Contributed by NM, 18-Dec-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       ((𝐶 ∈ ℋ ∧ ¬ 𝐶 ∈ (𝐴 + 𝐵)) → ((𝐵 + (span‘{𝐶})) ∩ 𝐴) = (𝐵𝐴))
 
Theoremsumdmdlem2 30790* Lemma for sumdmdi 30791. (Contributed by NM, 23-Dec-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       (∀𝑥 ∈ HAtoms ((𝑥 𝐵) ∩ (𝐴 𝐵)) ⊆ (((𝑥 𝐵) ∩ 𝐴) ∨ 𝐵) → (𝐴 + 𝐵) = (𝐴 𝐵))
 
Theoremsumdmdi 30791 The subspace sum of two Hilbert lattice elements is closed iff the elements are a dual modular pair. Theorem 2 of [Holland] p. 1519. (Contributed by NM, 14-Dec-2004.) (New usage is discouraged.)
𝐴C    &   𝐵C       ((𝐴 + 𝐵) = (𝐴 𝐵) ↔ 𝐴 𝑀* 𝐵)
 
Theoremdmdbr4ati 30792* Dual modular pair property in terms of atoms. (Contributed by NM, 15-Jan-2005.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝑀* 𝐵 ↔ ∀𝑥 ∈ HAtoms ((𝑥 𝐵) ∩ (𝐴 𝐵)) ⊆ (((𝑥 𝐵) ∩ 𝐴) ∨ 𝐵))
 
Theoremdmdbr5ati 30793* Dual modular pair property in terms of atoms. (Contributed by NM, 14-Jan-2005.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝑀* 𝐵 ↔ ∀𝑥 ∈ HAtoms (𝑥 ⊆ (𝐴 𝐵) → 𝑥 ⊆ (((𝑥 𝐵) ∩ 𝐴) ∨ 𝐵)))
 
Theoremdmdbr6ati 30794* Dual modular pair property in terms of atoms. The modular law takes the form of the shearing identity. (Contributed by NM, 18-Jan-2005.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝑀* 𝐵 ↔ ∀𝑥 ∈ HAtoms ((𝐴 𝐵) ∩ 𝑥) = ((((𝑥 𝐵) ∩ 𝐴) ∨ 𝐵) ∩ 𝑥))
 
Theoremdmdbr7ati 30795* Dual modular pair property in terms of atoms. (Contributed by NM, 18-Jan-2005.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝑀* 𝐵 ↔ ∀𝑥 ∈ HAtoms ((𝐴 𝐵) ∩ 𝑥) ⊆ (((𝑥 𝐵) ∩ 𝐴) ∨ 𝐵))
 
Theoremmdoc1i 30796 Orthocomplements form a modular pair. (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C       𝐴 𝑀 (⊥‘𝐴)
 
Theoremmdoc2i 30797 Orthocomplements form a modular pair. (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C       (⊥‘𝐴) 𝑀 𝐴
 
Theoremdmdoc1i 30798 Orthocomplements form a dual modular pair. (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C       𝐴 𝑀* (⊥‘𝐴)
 
Theoremdmdoc2i 30799 Orthocomplements form a dual modular pair. (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C       (⊥‘𝐴) 𝑀* 𝐴
 
Theoremmdcompli 30800 A condition equivalent to the modular pair property. Part of proof of Theorem 1.14 of [MaedaMaeda] p. 4. (Contributed by NM, 29-Apr-2006.) (New usage is discouraged.)
𝐴C    &   𝐵C       (𝐴 𝑀 𝐵 ↔ (𝐴 ∩ (⊥‘(𝐴𝐵))) 𝑀 (𝐵 ∩ (⊥‘(𝐴𝐵))))
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