Step | Hyp | Ref
| Expression |
1 | | leatom.b |
. . . . . 6
β’ π΅ = (BaseβπΎ) |
2 | | leatom.l |
. . . . . 6
β’ β€ =
(leβπΎ) |
3 | | leatom.z |
. . . . . 6
β’ 0 =
(0.βπΎ) |
4 | 1, 2, 3 | op0le 38045 |
. . . . 5
β’ ((πΎ β OP β§ π β π΅) β 0 β€ π) |
5 | 4 | 3adant3 1133 |
. . . 4
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β 0 β€ π) |
6 | 5 | biantrurd 534 |
. . 3
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β (π β€ π β ( 0 β€ π β§ π β€ π))) |
7 | | opposet 38040 |
. . . . . 6
β’ (πΎ β OP β πΎ β Poset) |
8 | 7 | 3ad2ant1 1134 |
. . . . 5
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β πΎ β Poset) |
9 | 1, 3 | op0cl 38043 |
. . . . . . 7
β’ (πΎ β OP β 0 β π΅) |
10 | | leatom.a |
. . . . . . . 8
β’ π΄ = (AtomsβπΎ) |
11 | 1, 10 | atbase 38148 |
. . . . . . 7
β’ (π β π΄ β π β π΅) |
12 | | id 22 |
. . . . . . 7
β’ (π β π΅ β π β π΅) |
13 | 9, 11, 12 | 3anim123i 1152 |
. . . . . 6
β’ ((πΎ β OP β§ π β π΄ β§ π β π΅) β ( 0 β π΅ β§ π β π΅ β§ π β π΅)) |
14 | 13 | 3com23 1127 |
. . . . 5
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β ( 0 β π΅ β§ π β π΅ β§ π β π΅)) |
15 | | eqid 2733 |
. . . . . . 7
β’ ( β
βπΎ) = ( β
βπΎ) |
16 | 3, 15, 10 | atcvr0 38147 |
. . . . . 6
β’ ((πΎ β OP β§ π β π΄) β 0 ( β βπΎ)π) |
17 | 16 | 3adant2 1132 |
. . . . 5
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β 0 ( β βπΎ)π) |
18 | 1, 2, 15 | cvrnbtwn4 38138 |
. . . . 5
β’ ((πΎ β Poset β§ ( 0 β π΅ β§ π β π΅ β§ π β π΅) β§ 0 ( β βπΎ)π) β (( 0 β€ π β§ π β€ π) β ( 0 = π β¨ π = π))) |
19 | 8, 14, 17, 18 | syl3anc 1372 |
. . . 4
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β (( 0 β€ π β§ π β€ π) β ( 0 = π β¨ π = π))) |
20 | | eqcom 2740 |
. . . . 5
β’ ( 0 = π β π = 0 ) |
21 | 20 | orbi1i 913 |
. . . 4
β’ (( 0 = π β¨ π = π) β (π = 0 β¨ π = π)) |
22 | 19, 21 | bitrdi 287 |
. . 3
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β (( 0 β€ π β§ π β€ π) β (π = 0 β¨ π = π))) |
23 | 6, 22 | bitrd 279 |
. 2
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β (π β€ π β (π = 0 β¨ π = π))) |
24 | | orcom 869 |
. 2
β’ ((π = 0 β¨ π = π) β (π = π β¨ π = 0 )) |
25 | 23, 24 | bitrdi 287 |
1
β’ ((πΎ β OP β§ π β π΅ β§ π β π΄) β (π β€ π β (π = π β¨ π = 0 ))) |