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| Mirrors > Home > NFE Home > Th. List > phi011lem1 | Unicode version | ||
| Description: Lemma for phi011 4600. (Contributed by SF, 3-Feb-2015.) | 
| Ref | Expression | 
|---|---|
| phi011lem1 | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | ssun1 3427 | 
. . . . 5
 | |
| 2 | 1 | sseli 3270 | 
. . . 4
 | 
| 3 | eleq2 2414 | 
. . . 4
 | |
| 4 | 2, 3 | syl5ib 210 | 
. . 3
 | 
| 5 | 0cnelphi 4598 | 
. . . . . 6
 | |
| 6 | eleq1 2413 | 
. . . . . 6
 | |
| 7 | 5, 6 | mtbiri 294 | 
. . . . 5
 | 
| 8 | 7 | con2i 112 | 
. . . 4
 | 
| 9 | 8 | a1i 10 | 
. . 3
 | 
| 10 | elun 3221 | 
. . . . . . 7
 | |
| 11 | df-sn 3742 | 
. . . . . . . . 9
 | |
| 12 | 11 | eqabri 2461 | 
. . . . . . . 8
 | 
| 13 | 12 | orbi2i 505 | 
. . . . . . 7
 | 
| 14 | 10, 13 | bitri 240 | 
. . . . . 6
 | 
| 15 | 14 | biimpi 186 | 
. . . . 5
 | 
| 16 | 15 | orcomd 377 | 
. . . 4
 | 
| 17 | 16 | ord 366 | 
. . 3
 | 
| 18 | 4, 9, 17 | ee22 1362 | 
. 2
 | 
| 19 | 18 | ssrdv 3279 | 
1
 | 
| Colors of variables: wff setvar class | 
| Syntax hints:    | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 ax-nin 4079 ax-sn 4088 | 
| This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-v 2862 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-ss 3260 df-nul 3552 df-if 3664 df-sn 3742 df-int 3928 df-1c 4137 df-0c 4378 df-addc 4379 df-nnc 4380 df-phi 4566 | 
| This theorem is referenced by: phi011 4600 | 
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