| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > dffn4 | Structured version Visualization version GIF version | ||
| Description: A function maps onto its range. (Contributed by NM, 10-May-1998.) |
| Ref | Expression |
|---|---|
| dffn4 | ⊢ (𝐹 Fn 𝐴 ↔ 𝐹:𝐴–onto→ran 𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2760 | . . 3 ⊢ ran 𝐹 = ran 𝐹 | |
| 2 | 1 | biantru 539 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) |
| 3 | df-fo 6544 | . 2 ⊢ (𝐹:𝐴–onto→ran 𝐹 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) | |
| 4 | 2, 3 | bitr4i 281 | 1 ⊢ (𝐹 Fn 𝐴 ↔ 𝐹:𝐴–onto→ran 𝐹) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1569 ran crn 5651 Fn wfn 6533 –onto→wfo 6536 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1812 df-cleq 2752 df-fo 6544 |
| This theorem is used by: funforn 6803 fimadmfo 6805 ffoss 7958 tposf2 8267 rneqdmfinf1o 9322 fidomdm 9323 indexfi 9349 intrnfi 9408 fifo 9424 ixpiunwdom 9584 infpwfien 10141 infmap2 10295 cfflb 10337 cfslb2n 10346 ttukeylem6 10592 dmct 10602 dmctOLD 10603 imadomnum 10614 fnrndomnum 10617 fnrndomgOLD 10619 rankcf 10862 tskuni 10868 tskurn 10874 fseqsupcl 14120 s7f1o 15119 vdwlem6 17164 0ram2 17199 0ramcl 17201 quslem 17715 gsumval3 20121 gsumzoppg 20158 mplsubrglem 22311 rncmp 23714 cmpsub 23718 tgcmp 23719 hauscmplem 23724 conncn 23744 2ndcctbss 23774 2ndcomap 23777 2ndcsep 23778 comppfsc 23851 ptcnplem 23940 txtube 23959 txcmplem1 23960 tx1stc 23969 tx2ndc 23970 qtopid 24024 qtopcmplem 24026 qtopkgen 24029 kqtopon 24046 kqopn 24053 kqcld 24054 qtopf1 24135 rnelfm 24272 fmfnfmlem2 24274 fmfnfm 24277 alexsubALT 24370 ptcmplem2 24372 tmdgsum2 24415 tsmsxplem1 24472 met1stc 24840 met2ndci 24841 uniiccdif 25899 dyadmbl 25921 mbfimaopnlem 25976 i1fadd 26016 i1fmul 26017 i1fmulc 26024 mbfi1fseqlem4 26039 limciun 26214 aannenlem3 26657 efabl 26878 logccv 26991 locfinreflem 34514 mvrsfpw 36313 msrfo 36353 mtyf 36359 bj-inftyexpitaufo 38166 itg2addnclem2 38633 istotbnd3 38748 sstotbnd 38752 prdsbnd 38770 cntotbnd 38773 heiborlem1 38788 heibor 38798 dihintcl 42444 focofob 48193 |
| Copyright terms: Public domain | W3C validator |