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| Mirrors > Home > ILE Home > Th. List > pitonnlem1 | Unicode version | ||
| Description: Lemma for pitonn 8067. Two ways to write the number one. (Contributed by Jim Kingdon, 24-Apr-2020.) |
| Ref | Expression |
|---|---|
| pitonnlem1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-1 8039 |
. 2
| |
| 2 | df-1r 7951 |
. . . 4
| |
| 3 | df-i1p 7686 |
. . . . . . . 8
| |
| 4 | df-1nqqs 7570 |
. . . . . . . . . . 11
| |
| 5 | 4 | breq2i 4096 |
. . . . . . . . . 10
|
| 6 | 5 | abbii 2347 |
. . . . . . . . 9
|
| 7 | 4 | breq1i 4095 |
. . . . . . . . . 10
|
| 8 | 7 | abbii 2347 |
. . . . . . . . 9
|
| 9 | 6, 8 | opeq12i 3867 |
. . . . . . . 8
|
| 10 | 3, 9 | eqtri 2252 |
. . . . . . 7
|
| 11 | 10 | oveq1i 6027 |
. . . . . 6
|
| 12 | 11 | opeq1i 3865 |
. . . . 5
|
| 13 | eceq1 6736 |
. . . . 5
| |
| 14 | 12, 13 | ax-mp 5 |
. . . 4
|
| 15 | 2, 14 | eqtri 2252 |
. . 3
|
| 16 | 15 | opeq1i 3865 |
. 2
|
| 17 | 1, 16 | eqtr2i 2253 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-cnv 4733 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fv 5334 df-ov 6020 df-ec 6703 df-1nqqs 7570 df-i1p 7686 df-1r 7951 df-1 8039 |
| This theorem is referenced by: pitonn 8067 |
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