| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > pitonnlem1 | Unicode version | ||
| Description: Lemma for pitonn 8215. Two ways to write the number one. (Contributed by Jim Kingdon, 24-Apr-2020.) |
| Ref | Expression |
|---|---|
| pitonnlem1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-1 8187 |
. 2
| |
| 2 | df-1r 8099 |
. . . 4
| |
| 3 | df-i1p 7834 |
. . . . . . . 8
| |
| 4 | df-1nqqs 7718 |
. . . . . . . . . . 11
| |
| 5 | 4 | breq2i 4138 |
. . . . . . . . . 10
|
| 6 | 5 | abbii 2354 |
. . . . . . . . 9
|
| 7 | 4 | breq1i 4137 |
. . . . . . . . . 10
|
| 8 | 7 | abbii 2354 |
. . . . . . . . 9
|
| 9 | 6, 8 | opeq12i 3909 |
. . . . . . . 8
|
| 10 | 3, 9 | eqtri 2259 |
. . . . . . 7
|
| 11 | 10 | oveq1i 6095 |
. . . . . 6
|
| 12 | 11 | opeq1i 3907 |
. . . . 5
|
| 13 | eceq1 6842 |
. . . . 5
| |
| 14 | 12, 13 | ax-mp 5 |
. . . 4
|
| 15 | 2, 14 | eqtri 2259 |
. . 3
|
| 16 | 15 | opeq1i 3907 |
. 2
|
| 17 | 1, 16 | eqtr2i 2260 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-xp 4780 df-cnv 4782 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fv 5385 df-ov 6088 df-ec 6809 df-1nqqs 7718 df-i1p 7834 df-1r 8099 df-1 8187 |
| This theorem is used by: pitonn 8215 |
| Copyright terms: Public domain | W3C validator |