| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Lemma for 5-quantifier AC of Kurt Maes, Th. 4, part of 3 => 4. |
| Ref | Expression |
|---|---|
| kmlem9.1 |
|
| Ref | Expression |
|---|---|
| kmlem12 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | difeq1 2156 |
. . . . . . . 8
| |
| 2 | sneq 2421 |
. . . . . . . . . . 11
| |
| 3 | 2 | difeq2d 2162 |
. . . . . . . . . 10
|
| 4 | 3 | unieqd 2516 |
. . . . . . . . 9
|
| 5 | 4 | difeq2d 2162 |
. . . . . . . 8
|
| 6 | 1, 5 | eqtrd 1510 |
. . . . . . 7
|
| 7 | 6 | neeq1d 1597 |
. . . . . 6
|
| 8 | 7 | cbvralv 1803 |
. . . . 5
|
| 9 | 6 | ineq1d 2219 |
. . . . . . . 8
|
| 10 | 9 | eleq2d 1544 |
. . . . . . 7
|
| 11 | 10 | eubidv 1388 |
. . . . . 6
|
| 12 | 11 | cbvralv 1803 |
. . . . 5
|
| 13 | 8, 12 | imbi12i 188 |
. . . 4
|
| 14 | kmlem9.1 |
. . . . . . . . . . . 12
| |
| 15 | 14 | kmlem11 4785 |
. . . . . . . . . . 11
|
| 16 | 15 | ineq1d 2219 |
. . . . . . . . . 10
|
| 17 | in12 2227 |
. . . . . . . . . . 11
| |
| 18 | incom 2211 |
. . . . . . . . . . 11
| |
| 19 | 17, 18 | eqtr 1498 |
. . . . . . . . . 10
|
| 20 | 16, 19 | syl5req 1523 |
. . . . . . . . 9
|
| 21 | 20 | eleq2d 1544 |
. . . . . . . 8
|
| 22 | 21 | eubidv 1388 |
. . . . . . 7
|
| 23 | ax-1 4 |
. . . . . . 7
| |
| 24 | 22, 23 | syl6bi 214 |
. . . . . 6
|
| 25 | 24 | r19.20i 1707 |
. . . . 5
|
| 26 | 25 | imim2i 17 |
. . . 4
|
| 27 | 13, 26 | sylbi 199 |
. . 3
|
| 28 | 27 | com12 11 |
. 2
|
| 29 | raleq1 1789 |
. . . . 5
| |
| 30 | 14, 29 | ax-mp 7 |
. . . 4
|
| 31 | df-ral 1652 |
. . . 4
| |
| 32 | visset 1816 |
. . . . . . . . 9
| |
| 33 | eqeq1 1484 |
. . . . . . . . . 10
| |
| 34 | 33 | rexbidv 1667 |
. . . . . . . . 9
|
| 35 | 32, 34 | elab 1900 |
. . . . . . . 8
|
| 36 | 35 | imbi1i 186 |
. . . . . . 7
|
| 37 | r19.23v 1744 |
. . . . . . 7
| |
| 38 | 36, 37 | bitr4 176 |
. . . . . 6
|
| 39 | 38 | albii 1001 |
. . . . 5
|
| 40 | ralcom4 1826 |
. . . . 5
|