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Mirrors > Home > ILE Home > Th. List > fneq2 | Unicode version |
Description: Equality theorem for function predicate with domain. (Contributed by NM, 1-Aug-1994.) |
Ref | Expression |
---|---|
fneq2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeq2 2147 | . . 3 | |
2 | 1 | anbi2d 459 | . 2 |
3 | df-fn 5121 | . 2 | |
4 | df-fn 5121 | . 2 | |
5 | 2, 3, 4 | 3bitr4g 222 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1331 cdm 4534 wfun 5112 wfn 5113 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-gen 1425 ax-4 1487 ax-17 1506 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-cleq 2130 df-fn 5121 |
This theorem is referenced by: fneq2d 5209 fneq2i 5213 feq2 5251 foeq2 5337 f1o00 5395 eqfnfv2 5512 tfr0dm 6212 tfrlemisucaccv 6215 tfrlemi1 6222 tfrlemi14d 6223 tfrexlem 6224 tfr1onlemsucfn 6230 tfr1onlemsucaccv 6231 tfr1onlembxssdm 6233 tfr1onlembfn 6234 tfr1onlemaccex 6238 tfr1onlemres 6239 ixpeq1 6596 0fz1 9818 |
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