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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 2735 | . . 3 ⊢ ran 𝐹 = ran 𝐹 | |
| 2 | 1 | biantru 529 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 = ran 𝐹)) |
| 3 | df-fo 6493 | . 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 5621 Fn wfn 6482 –onto→wfo 6485 |
| 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 2707 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2727 df-fo 6493 |
| This theorem is referenced by: funforn 6748 fimadmfo 6750 ffoss 7888 tposf2 8189 rneqdmfinf1o 9232 fidomdm 9233 indexfi 9259 intrnfi 9318 fifo 9334 ixpiunwdom 9494 infpwfien 9973 infmap2 10128 cfflb 10170 cfslb2n 10179 ttukeylem6 10425 dmct 10435 fnrndomg 10447 rankcf 10689 tskuni 10695 tskurn 10701 fseqsupcl 13928 s7f1o 14917 vdwlem6 16946 0ram2 16981 0ramcl 16983 quslem 17496 gsumval3 19871 gsumzoppg 19908 mplsubrglem 21971 rncmp 23349 cmpsub 23353 tgcmp 23354 hauscmplem 23359 conncn 23379 2ndcctbss 23408 2ndcomap 23411 2ndcsep 23412 comppfsc 23485 ptcnplem 23574 txtube 23593 txcmplem1 23594 tx1stc 23603 tx2ndc 23604 qtopid 23658 qtopcmplem 23660 qtopkgen 23663 kqtopon 23680 kqopn 23687 kqcld 23688 qtopf1 23769 rnelfm 23906 fmfnfmlem2 23908 fmfnfm 23911 alexsubALT 24004 ptcmplem2 24006 tmdgsum2 24049 tsmsxplem1 24106 met1stc 24474 met2ndci 24475 uniiccdif 25533 dyadmbl 25555 mbfimaopnlem 25610 i1fadd 25650 i1fmul 25651 i1fmulc 25658 mbfi1fseqlem4 25673 limciun 25849 aannenlem3 26284 efabl 26502 logccv 26615 locfinreflem 33972 mvrsfpw 35676 msrfo 35716 mtyf 35722 bj-inftyexpitaufo 37504 itg2addnclem2 37981 istotbnd3 38080 sstotbnd 38084 prdsbnd 38102 cntotbnd 38105 heiborlem1 38120 heibor 38130 dihintcl 41778 focofob 47516 |
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