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Description: Alternate definition for the commutes relation. Lemma 3 of Kalmbach p. 23. ( cmbr3 analog.) (Contributed by NM, 8-Nov-2011) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | cmtbr2.b | ⊢ 𝐵 = ( Base ‘ 𝐾 ) | |
| cmtbr2.j | ⊢ ∨ = ( join ‘ 𝐾 ) | ||
| cmtbr2.m | ⊢ ∧ = ( meet ‘ 𝐾 ) | ||
| cmtbr2.o | ⊢ ⊥ = ( oc ‘ 𝐾 ) | ||
| cmtbr2.c | ⊢ 𝐶 = ( cm ‘ 𝐾 ) | ||
| Assertion | cmtbr3N | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 𝐶 𝑌 ↔ ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cmtbr2.b | ⊢ 𝐵 = ( Base ‘ 𝐾 ) | |
| 2 | cmtbr2.j | ⊢ ∨ = ( join ‘ 𝐾 ) | |
| 3 | cmtbr2.m | ⊢ ∧ = ( meet ‘ 𝐾 ) | |
| 4 | cmtbr2.o | ⊢ ⊥ = ( oc ‘ 𝐾 ) | |
| 5 | cmtbr2.c | ⊢ 𝐶 = ( cm ‘ 𝐾 ) | |
| 6 | 1 5 | cmtcomN | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 𝐶 𝑌 ↔ 𝑌 𝐶 𝑋 ) ) |
| 7 | 1 2 3 4 5 | cmtbr2N | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑌 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ) → ( 𝑌 𝐶 𝑋 ↔ 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) |
| 8 | 7 | 3com23 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑌 𝐶 𝑋 ↔ 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) |
| 9 | 6 8 | bitrd | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 𝐶 𝑌 ↔ 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) |
| 10 | oveq2 | ⊢ ( 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) → ( 𝑋 ∧ 𝑌 ) = ( 𝑋 ∧ ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) | |
| 11 | 10 | adantl | ⊢ ( ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) ∧ 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) → ( 𝑋 ∧ 𝑌 ) = ( 𝑋 ∧ ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) |
| 12 | omlol | ⊢ ( 𝐾 ∈ OML → 𝐾 ∈ OL ) | |
| 13 | 12 | 3ad2ant1 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝐾 ∈ OL ) |
| 14 | simp2 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝑋 ∈ 𝐵 ) | |
| 15 | omllat | ⊢ ( 𝐾 ∈ OML → 𝐾 ∈ Lat ) | |
| 16 | 15 | 3ad2ant1 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝐾 ∈ Lat ) |
| 17 | simp3 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝑌 ∈ 𝐵 ) | |
| 18 | 1 2 | latjcl | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑌 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ) → ( 𝑌 ∨ 𝑋 ) ∈ 𝐵 ) |
| 19 | 16 17 14 18 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑌 ∨ 𝑋 ) ∈ 𝐵 ) |
| 20 | omlop | ⊢ ( 𝐾 ∈ OML → 𝐾 ∈ OP ) | |
| 21 | 20 | 3ad2ant1 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝐾 ∈ OP ) |
| 22 | 1 4 | opoccl | ⊢ ( ( 𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵 ) → ( ⊥ ‘ 𝑋 ) ∈ 𝐵 ) |
| 23 | 21 14 22 | syl2anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ⊥ ‘ 𝑋 ) ∈ 𝐵 ) |
| 24 | 1 2 | latjcl | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑌 ∈ 𝐵 ∧ ( ⊥ ‘ 𝑋 ) ∈ 𝐵 ) → ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ∈ 𝐵 ) |
| 25 | 16 17 23 24 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ∈ 𝐵 ) |
| 26 | 1 3 | latmassOLD | ⊢ ( ( 𝐾 ∈ OL ∧ ( 𝑋 ∈ 𝐵 ∧ ( 𝑌 ∨ 𝑋 ) ∈ 𝐵 ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ∈ 𝐵 ) ) → ( ( 𝑋 ∧ ( 𝑌 ∨ 𝑋 ) ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) = ( 𝑋 ∧ ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) |
| 27 | 13 14 19 25 26 | syl13anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( 𝑌 ∨ 𝑋 ) ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) = ( 𝑋 ∧ ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) ) |
| 28 | 1 2 | latjcom | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑌 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ) → ( 𝑌 ∨ 𝑋 ) = ( 𝑋 ∨ 𝑌 ) ) |
| 29 | 16 17 14 28 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑌 ∨ 𝑋 ) = ( 𝑋 ∨ 𝑌 ) ) |
| 30 | 29 | oveq2d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( 𝑌 ∨ 𝑋 ) ) = ( 𝑋 ∧ ( 𝑋 ∨ 𝑌 ) ) ) |
| 31 | 1 2 3 | latabs2 | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( 𝑋 ∨ 𝑌 ) ) = 𝑋 ) |
| 32 | 15 31 | syl3an1 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( 𝑋 ∨ 𝑌 ) ) = 𝑋 ) |
| 33 | 30 32 | eqtrd | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( 𝑌 ∨ 𝑋 ) ) = 𝑋 ) |
| 34 | 1 2 | latjcom | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑌 ∈ 𝐵 ∧ ( ⊥ ‘ 𝑋 ) ∈ 𝐵 ) → ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) = ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) |
| 35 | 16 17 23 34 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) = ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) |
| 36 | 33 35 | oveq12d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( 𝑌 ∨ 𝑋 ) ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) = ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) ) |
| 37 | 27 36 | eqtr3d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) = ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) ) |
| 38 | 37 | adantr | ⊢ ( ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) ∧ 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) → ( 𝑋 ∧ ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) = ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) ) |
| 39 | 11 38 | eqtr2d | ⊢ ( ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) ∧ 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) ) → ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) |
| 40 | 39 | ex | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑌 = ( ( 𝑌 ∨ 𝑋 ) ∧ ( 𝑌 ∨ ( ⊥ ‘ 𝑋 ) ) ) → ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) ) |
| 41 | 9 40 | sylbid | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 𝐶 𝑌 → ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) ) |
| 42 | simp1 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝐾 ∈ OML ) | |
| 43 | 1 4 | opoccl | ⊢ ( ( 𝐾 ∈ OP ∧ 𝑌 ∈ 𝐵 ) → ( ⊥ ‘ 𝑌 ) ∈ 𝐵 ) |
| 44 | 21 17 43 | syl2anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ⊥ ‘ 𝑌 ) ∈ 𝐵 ) |
| 45 | 1 3 | latmcl | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ ( ⊥ ‘ 𝑌 ) ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∈ 𝐵 ) |
| 46 | 16 14 44 45 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∈ 𝐵 ) |
| 47 | 42 46 14 | 3jca | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝐾 ∈ OML ∧ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ) ) |
| 48 | eqid | ⊢ ( le ‘ 𝐾 ) = ( le ‘ 𝐾 ) | |
| 49 | 1 48 3 | latmle1 | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ ( ⊥ ‘ 𝑌 ) ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ( le ‘ 𝐾 ) 𝑋 ) |
| 50 | 16 14 44 49 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ( le ‘ 𝐾 ) 𝑋 ) |
| 51 | 1 48 2 3 4 | omllaw2N | ⊢ ( ( 𝐾 ∈ OML ∧ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ( le ‘ 𝐾 ) 𝑋 → ( ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∨ ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) = 𝑋 ) ) |
| 52 | 47 50 51 | sylc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∨ ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) = 𝑋 ) |
| 53 | 1 4 | opoccl | ⊢ ( ( 𝐾 ∈ OP ∧ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∈ 𝐵 ) → ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∈ 𝐵 ) |
| 54 | 21 46 53 | syl2anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∈ 𝐵 ) |
| 55 | 1 3 | latmcl | ⊢ ( ( 𝐾 ∈ Lat ∧ ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ) → ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∈ 𝐵 ) |
| 56 | 16 54 14 55 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∈ 𝐵 ) |
| 57 | 1 2 | latjcom | ⊢ ( ( 𝐾 ∈ Lat ∧ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∈ 𝐵 ∧ ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∨ ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) = ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) |
| 58 | 16 46 56 57 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ∨ ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) = ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) |
| 59 | 52 58 | eqtr3d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → 𝑋 = ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) |
| 60 | 59 | adantr | ⊢ ( ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) ∧ ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) → 𝑋 = ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) |
| 61 | 1 2 3 4 | oldmm3N | ⊢ ( ( 𝐾 ∈ OL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) = ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) |
| 62 | 12 61 | syl3an1 | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) = ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) |
| 63 | 62 | oveq2d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) = ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) ) |
| 64 | 1 3 | latmcom | ⊢ ( ( 𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) = ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) |
| 65 | 16 14 54 64 | syl3anc | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) = ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) |
| 66 | 63 65 | eqtr3d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ) |
| 67 | 66 | eqeq1d | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ↔ ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) = ( 𝑋 ∧ 𝑌 ) ) ) |
| 68 | oveq1 | ⊢ ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) = ( 𝑋 ∧ 𝑌 ) → ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) = ( ( 𝑋 ∧ 𝑌 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) | |
| 69 | 67 68 | biimtrdi | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) → ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) = ( ( 𝑋 ∧ 𝑌 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) ) |
| 70 | 69 | imp | ⊢ ( ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) ∧ ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) → ( ( ( ⊥ ‘ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ∧ 𝑋 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) = ( ( 𝑋 ∧ 𝑌 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) |
| 71 | 60 70 | eqtrd | ⊢ ( ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) ∧ ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) → 𝑋 = ( ( 𝑋 ∧ 𝑌 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) |
| 72 | 71 | ex | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) → 𝑋 = ( ( 𝑋 ∧ 𝑌 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) ) |
| 73 | 1 2 3 4 5 | cmtvalN | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 𝐶 𝑌 ↔ 𝑋 = ( ( 𝑋 ∧ 𝑌 ) ∨ ( 𝑋 ∧ ( ⊥ ‘ 𝑌 ) ) ) ) ) |
| 74 | 72 73 | sylibrd | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) → 𝑋 𝐶 𝑌 ) ) |
| 75 | 41 74 | impbid | ⊢ ( ( 𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ) → ( 𝑋 𝐶 𝑌 ↔ ( 𝑋 ∧ ( ( ⊥ ‘ 𝑋 ) ∨ 𝑌 ) ) = ( 𝑋 ∧ 𝑌 ) ) ) |