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Mirrors > Home > ILE Home > Th. List > f1ofo | GIF version |
Description: A one-to-one onto function is an onto function. (Contributed by NM, 28-Apr-2004.) |
Ref | Expression |
---|---|
f1ofo | ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dff1o3 5381 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 ↔ (𝐹:𝐴–onto→𝐵 ∧ Fun ◡𝐹)) | |
2 | 1 | simplbi 272 | 1 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ◡ccnv 4546 Fun wfun 5125 –onto→wfo 5129 –1-1-onto→wf1o 5130 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-11 1485 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-in 3082 df-ss 3089 df-f 5135 df-f1 5136 df-fo 5137 df-f1o 5138 |
This theorem is referenced by: f1imacnv 5392 f1ococnv2 5402 fo00 5411 isoini 5727 isoselem 5729 f1opw2 5984 f1dmex 6022 bren 6649 f1oeng 6659 en1 6701 mapen 6748 ssenen 6753 phplem4 6757 phplem4on 6769 dif1en 6781 fiintim 6825 fidcenumlemim 6848 supisolem 6903 ordiso2 6928 djuunr 6959 omct 7010 ctssexmid 7032 1fv 9947 hashfacen 10611 fsumf1o 11191 fisumss 11193 ennnfonelemrn 11968 ennnfonelemnn0 11971 ennnfonelemim 11973 exmidunben 11975 ctinfomlemom 11976 ctinfom 11977 qnnen 11980 enctlem 11981 hmeontr 12521 hmeoimaf1o 12522 subctctexmid 13369 exmidsbthrlem 13392 sbthomlem 13395 |
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