| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > suceq | Unicode version | ||
| Description: Equality of successors. (Contributed by NM, 30-Aug-1993.) (Proof shortened by Andrew Salmon, 25-Jul-2011.) |
| Ref | Expression |
|---|---|
| suceq |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 19 |
. . 3
| |
| 2 | sneq 3720 |
. . 3
| |
| 3 | 1, 2 | uneq12d 3384 |
. 2
|
| 4 | df-suc 4516 |
. 2
| |
| 5 | df-suc 4516 |
. 2
| |
| 6 | 3, 4, 5 | 3eqtr4g 2296 |
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-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 df-sn 3715 df-suc 4516 |
| This theorem is used by: eqelsuc 4564 2ordpr 4671 onsucsssucexmid 4674 onsucelsucexmid 4677 ordsucunielexmid 4678 suc11g 4704 onsucuni2 4711 0elsucexmid 4712 ordpwsucexmid 4717 peano2 4742 findes 4750 nn0suc 4751 0elnn 4766 omsinds 4769 tfr1onlemsucaccv 6612 tfrcllemsucaccv 6625 tfrcl 6635 frecabcl 6670 frecsuc 6678 sucinc 6718 sucinc2 6719 oacl 6733 oav2 6736 oasuc 6737 oa1suc 6740 nna0r 6751 nnacom 6757 nnaass 6758 nnmsucr 6761 nnsucelsuc 6764 nnsucsssuc 6765 nnaword 6784 nnaordex 6801 phplem3g 7157 nneneq 7158 php5 7159 php5dom 7164 omp1eomlem 7434 omp1eom 7435 nninfninc 7463 nnnninfeq 7468 nnnninfeq2 7469 nninfwlpoimlemg 7515 nninfwlpoimlemginf 7516 nninfwlpoim 7519 nninfinfwlpo 7520 indpi 7709 ennnfoneleminc 13302 ennnfonelemex 13305 bj-indsuc 16954 bj-bdfindes 16975 bj-nn0suc0 16976 bj-peano4 16981 bj-inf2vnlem1 16996 bj-nn0sucALT 17004 bj-findes 17007 nnsf 17048 nninfsellemdc 17053 nninfself 17056 nninfsellemeqinf 17059 nninfomni 17062 |
| Copyright terms: Public domain | W3C validator |