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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 2737 | . . 3 ⊢ ran 𝐹 = ran 𝐹 | |
| 2 | 1 | biantru 529 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) |
| 3 | df-fo 6496 | . 2 ⊢ (𝐹:𝐴–onto→ran 𝐹 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) | |
| 4 | 2, 3 | bitr4i 278 | 1 ⊢ (𝐹 Fn 𝐴 ↔ 𝐹:𝐴–onto→ran 𝐹) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1542 ran crn 5623 Fn wfn 6485 –onto→wfo 6488 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-fo 6496 |
| This theorem is referenced by: funforn 6751 fimadmfo 6753 ffoss 7890 tposf2 8191 rneqdmfinf1o 9234 fidomdm 9235 indexfi 9261 intrnfi 9320 fifo 9336 ixpiunwdom 9496 infpwfien 9973 infmap2 10128 cfflb 10170 cfslb2n 10179 ttukeylem6 10425 dmct 10435 fnrndomg 10447 rankcf 10689 tskuni 10695 tskurn 10701 fseqsupcl 13901 s7f1o 14890 vdwlem6 16915 0ram2 16950 0ramcl 16952 quslem 17465 gsumval3 19840 gsumzoppg 19877 mplsubrglem 21960 rncmp 23339 cmpsub 23343 tgcmp 23344 hauscmplem 23349 conncn 23369 2ndcctbss 23398 2ndcomap 23401 2ndcsep 23402 comppfsc 23475 ptcnplem 23564 txtube 23583 txcmplem1 23584 tx1stc 23593 tx2ndc 23594 qtopid 23648 qtopcmplem 23650 qtopkgen 23653 kqtopon 23670 kqopn 23677 kqcld 23678 qtopf1 23759 rnelfm 23896 fmfnfmlem2 23898 fmfnfm 23901 alexsubALT 23994 ptcmplem2 23996 tmdgsum2 24039 tsmsxplem1 24096 met1stc 24464 met2ndci 24465 uniiccdif 25523 dyadmbl 25545 mbfimaopnlem 25600 i1fadd 25640 i1fmul 25641 i1fmulc 25648 mbfi1fseqlem4 25663 limciun 25839 aannenlem3 26278 efabl 26499 logccv 26612 locfinreflem 33990 mvrsfpw 35694 msrfo 35734 mtyf 35740 bj-inftyexpitaufo 37514 itg2addnclem2 37984 istotbnd3 38083 sstotbnd 38087 prdsbnd 38105 cntotbnd 38108 heiborlem1 38123 heibor 38133 dihintcl 41781 focofob 47514 |
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