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| Mirrors > Home > ILE Home > Th. List > eqeq2i | Unicode version | ||
| Description: Inference from equality to equivalence of equalities. (Contributed by NM, 5-Aug-1993.) |
| Ref | Expression |
|---|---|
| eqeq2i.1 |
|
| Ref | Expression |
|---|---|
| eqeq2i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq2i.1 |
. 2
| |
| 2 | eqeq2 2248 |
. 2
| |
| 3 | 1, 2 | ax-mp 5 |
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-5 1500 ax-gen 1502 ax-4 1563 ax-17 1579 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 |
| This theorem is used by: eqtri 2259 eqabbw 2375 rabid2 2729 ssalel 3235 equncom 3374 ab0w 3550 preq12b 3895 preqsn 3900 opeqpr 4396 orddif 4696 dfrel4v 5242 dfiota2 5341 funopg 5414 funopsn 5894 fnressn 5904 fressnfv 5905 riotaeqimp 6066 acexmidlemph 6081 fnovim 6200 tpossym 6551 qsid 6878 mapsncnv 6981 ixpsnf1o 7022 pw1fin 7221 ss1o0el1o 7224 unfiexmid 7229 onntri35 7602 recidpirq 8231 axprecex 8253 negeq0 8587 muleqadd 9006 fihasheq0 11254 hashfibc 11305 hashf1lem2 11308 cjne0 11696 sqrt00 11828 sqrtmsq2i 11924 cbvsum 12151 fsump1i 12225 mertenslem2 12328 cbvprod 12350 absefib 12563 efieq1re 12564 isnsg4 14074 isassa 15111 plyco 15985 sineq0re 16076 ppiqub 16293 lgsdinn0 16372 m1lgs 16409 upgrex 16549 uhgr2edg 16652 usgredg2vlem1 16668 usgredg2vlem2 16669 ushgredgedg 16672 ushgredgedgloop 16674 exmidnotnotr 17241 iswomninnlem 17306 |
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