| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > fnresdm | Structured version Visualization version GIF version | ||
| Description: A function does not change when restricted to its domain. (Contributed by NM, 5-Sep-2004.) |
| Ref | Expression |
|---|---|
| fnresdm | ⊢ (𝐹 Fn 𝐴 → (𝐹 ↾ 𝐴) = 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnrel 6594 | . 2 ⊢ (𝐹 Fn 𝐴 → Rel 𝐹) | |
| 2 | fndm 6595 | . . 3 ⊢ (𝐹 Fn 𝐴 → dom 𝐹 = 𝐴) | |
| 3 | eqimss 3992 | . . 3 ⊢ (dom 𝐹 = 𝐴 → dom 𝐹 ⊆ 𝐴) | |
| 4 | 2, 3 | syl 17 | . 2 ⊢ (𝐹 Fn 𝐴 → dom 𝐹 ⊆ 𝐴) |
| 5 | relssres 5981 | . 2 ⊢ ((Rel 𝐹 ∧ dom 𝐹 ⊆ 𝐴) → (𝐹 ↾ 𝐴) = 𝐹) | |
| 6 | 1, 4, 5 | syl2anc 584 | 1 ⊢ (𝐹 Fn 𝐴 → (𝐹 ↾ 𝐴) = 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ⊆ wss 3901 dom cdm 5624 ↾ cres 5626 Rel wrel 5629 Fn wfn 6487 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-br 5099 df-opab 5161 df-xp 5630 df-rel 5631 df-dm 5634 df-res 5636 df-fun 6494 df-fn 6495 |
| This theorem is referenced by: fnima 6622 fresin 6703 resasplit 6704 fresaunres2 6706 fvreseq1 6984 fnsnr 7109 fninfp 7120 fnsnsplit 7130 fsnunfv 7133 fsnunres 7134 fnsuppeq0 8134 mapunen 9074 dif1enlem 9084 fnfi 9102 canthp1lem2 10564 fseq1p1m1 13514 facnn 14198 fac0 14199 hashgval 14256 hashinf 14258 rlimres 15481 lo1res 15482 rlimresb 15488 isercolllem2 15589 isercoll 15591 ruclem4 16159 fsets 17096 sscres 17747 sscid 17748 gsumzres 19838 gsumle 20074 pwssplit1 21011 zzngim 21507 ptuncnv 23751 ptcmpfi 23757 tsmsres 24088 imasdsf1olem 24317 tmslem 24426 tmsxms 24430 imasf1oxms 24433 prdsxms 24474 tmsxps 24480 tmsxpsmopn 24481 isngp2 24541 tngngp2 24596 cnfldms 24719 cncms 25311 cnfldcusp 25313 mbfres2 25602 dvres 25868 dvres3a 25871 cpnres 25895 dvmptres3 25916 dvlip2 25956 dvgt0lem2 25964 dvne0 25972 rlimcnp2 26932 jensen 26955 eupthvdres 30310 sspg 30803 ssps 30805 sspn 30811 hhsssh 31344 fnresin 32702 padct 32797 ffsrn 32807 resf1o 32809 indf1ofs 32948 symgcom 33165 cycpmconjvlem 33223 cycpmconjslem1 33236 nsgqusf1o 33497 ply1degltdimlem 33779 cnrrext 34167 eulerpartlemt 34528 subfacp1lem3 35376 subfacp1lem5 35378 cvmliftlem11 35489 poimirlem9 37830 dvun 42614 mapfzcons1 42959 eq0rabdioph 43018 eldioph4b 43053 diophren 43055 pwssplit4 43331 tfsconcatrev 43590 dvresntr 46162 sge0split 46653 imaidfu2 49356 |
| Copyright terms: Public domain | W3C validator |