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| 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 2752 | . . 3 ⊢ ran 𝐹 = ran 𝐹 | |
| 2 | 1 | biantru 536 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) |
| 3 | df-fo 6512 | . 2 ⊢ (𝐹:𝐴–onto→ran 𝐹 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) | |
| 4 | 2, 3 | bitr4i 280 | 1 ⊢ (𝐹 Fn 𝐴 ↔ 𝐹:𝐴–onto→ran 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 208 ∧ wa 398 = wceq 1550 ran crn 5637 Fn wfn 6501 –onto→wfo 6504 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-9 2142 ax-ext 2724 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1790 df-cleq 2744 df-fo 6512 |
| This theorem is referenced by: funforn 6770 fimadmfo 6772 ffoss 7912 tposf2 8214 rneqdmfinf1o 9262 fidomdm 9263 indexfi 9289 intrnfi 9348 fifo 9364 ixpiunwdom 9524 infpwfien 10004 infmap2 10159 cfflb 10202 cfslb2n 10211 ttukeylem6 10457 dmct 10467 fnrndomg 10479 rankcf 10721 tskuni 10727 tskurn 10733 fseqsupcl 13976 s7f1o 14965 vdwlem6 16994 0ram2 17029 0ramcl 17031 quslem 17545 gsumval3 19919 gsumzoppg 19956 mplsubrglem 22024 rncmp 23425 cmpsub 23429 tgcmp 23430 hauscmplem 23435 conncn 23455 2ndcctbss 23484 2ndcomap 23487 2ndcsep 23488 comppfsc 23561 ptcnplem 23650 txtube 23669 txcmplem1 23670 tx1stc 23679 tx2ndc 23680 qtopid 23734 qtopcmplem 23736 qtopkgen 23739 kqtopon 23756 kqopn 23763 kqcld 23764 qtopf1 23845 rnelfm 23982 fmfnfmlem2 23984 fmfnfm 23987 alexsubALT 24080 ptcmplem2 24082 tmdgsum2 24125 tsmsxplem1 24182 met1stc 24550 met2ndci 24551 uniiccdif 25609 dyadmbl 25631 mbfimaopnlem 25686 i1fadd 25726 i1fmul 25727 i1fmulc 25734 mbfi1fseqlem4 25749 limciun 25925 aannenlem3 26360 efabl 26581 logccv 26694 locfinreflem 34081 mvrsfpw 35794 msrfo 35834 mtyf 35840 bj-inftyexpitaufo 37632 itg2addnclem2 38109 istotbnd3 38208 sstotbnd 38212 prdsbnd 38230 cntotbnd 38233 heiborlem1 38248 heibor 38258 dihintcl 41906 focofob 47612 |
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