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| Mirrors > Home > ILE Home > Th. List > funeqd | GIF version | ||
| Description: Equality deduction for the function predicate. (Contributed by NM, 23-Feb-2013.) |
| Ref | Expression |
|---|---|
| funeqd.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| funeqd | ⊢ (𝜑 → (Fun 𝐴 ↔ Fun 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funeqd.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | funeq 5371 | . 2 ⊢ (𝐴 = 𝐵 → (Fun 𝐴 ↔ Fun 𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (Fun 𝐴 ↔ Fun 𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1398 Fun wfun 5345 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-in 3216 df-ss 3223 df-br 4109 df-opab 4171 df-rel 4755 df-cnv 4756 df-co 4757 df-fun 5353 |
| This theorem is referenced by: funopg 5385 funsng 5401 funcnvuni 5424 f1eq1 5567 f1ssf1 5645 funopsn 5859 frecuzrdgtclt 10779 fundm2domnop0 11213 shftfn 11502 ennnfonelemfun 13157 ennnfonelemf1 13158 isstruct2im 13211 isstruct2r 13212 structfung 13218 setsfun 13236 setsfun0 13237 strslfv3 13247 uhgrspansubgrlem 16258 p1evtxdeqfilem 16293 istrl 16367 trlsegvdeglem2 16443 trlsegvdeglem3 16444 funmptd 16562 |
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