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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 6552 qsid 6879 mapsncnv 6983 ixpsnf1o 7024 pw1fin 7223 ss1o0el1o 7226 unfiexmid 7231 onntri35 7602 recidpirq 8231 axprecex 8253 negeq0 8587 muleqadd 9006 fihasheq0 11253 hashfibc 11304 hashf1lem2 11307 cjne0 11695 sqrt00 11827 sqrtmsq2i 11923 cbvsum 12150 fsump1i 12224 mertenslem2 12327 cbvprod 12349 absefib 12562 efieq1re 12563 isnsg4 14073 isassa 15110 plyco 16002 sineq0re 16093 ppiqub 16310 lgsdinn0 16389 m1lgs 16426 upgrex 16566 uhgr2edg 16669 usgredg2vlem1 16685 usgredg2vlem2 16686 ushgredgedg 16689 ushgredgedgloop 16691 exmidnotnotr 17258 iswomninnlem 17323 |
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