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| Mirrors > Home > ILE Home > Th. List > ffn | GIF version | ||
| Description: A mapping is a function. (Contributed by NM, 2-Aug-1994.) |
| Ref | Expression |
|---|---|
| ffn | ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-f 5384 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
| 2 | 1 | simplbi 274 | 1 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ⊆ wss 3220 ran crn 4777 Fn wfn 5375 ⟶wf 5376 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 |
| This proof depends on definitions: df-bi 117 df-f 5384 |
| This theorem is used by: ffnd 5537 ffun 5539 frel 5541 fdm 5542 ffrn 5548 fresin 5571 fresaunres2disj 5573 fcoi1 5575 feu 5577 f0bi 5588 fnconstg 5593 f1fn 5603 fofn 5620 dffo2 5622 fimadmfo 5627 f1ofn 5643 fdmeu 5749 feqmptd 5759 fvco3 5779 ffvelcdm 5844 dff2 5855 dffo3 5858 dffo4 5859 dffo5 5860 f1ompt 5862 ffnfv 5869 fcompt 5881 fsn2 5885 fconst2g 5933 fconstfvm 5936 fdmexb 5942 fex 5950 dff13 5977 cocan1 5996 off 6319 suppssof1 6324 ofco 6325 caofref 6331 caofrss 6338 caoftrn 6339 fo1stresm 6399 fo2ndresm 6400 1stcof 6401 2ndcof 6402 fo2ndf 6467 fsuppeq 6491 fsuppeqg 6492 tposf2 6543 smoiso 6577 tfrcllemssrecs 6627 tfrcllemsucaccv 6629 elmapfn 6956 mapsnd 6974 mapsn 6976 pw2f1odclem 7138 mapen 7150 mapunen 7155 updjudhcoinlf 7426 updjudhcoinrg 7427 updjud 7428 omp1eomlem 7440 ofsubeq0 9300 dfz2 9728 uzn0 9954 unirnioo 10392 dfioo2 10393 ioorebasg 10394 fzen 10464 fseq1p1m1 10518 2ffzeq 10565 fvinim0ffz 10677 frecuzrdglem 10869 frecuzrdgtcl 10870 frecuzrdg0 10871 frecuzrdgfunlem 10877 frecuzrdg0t 10880 seq3val 10918 seqvalcd 10919 ser0f 10992 ffz0hash 11298 fnfzo0hash 11300 wrdred1hash 11370 shftf 11617 uzin2 11775 rexanuz 11776 prodf1f 12335 eff2 12472 reeff1 12492 tanvalap 12500 1arithlem4 13174 1arith 13175 isgrpinv 13918 kerf1ghm 14136 cnfldadd 15008 cnfldmul 15010 cnfldplusf 15020 cnfldsub 15021 znunit 15103 psrbaglecl 15169 psrlidmfi 15199 lmbr2 15440 cncnpi 15454 cncnp 15456 cnpdis 15468 lmff 15475 tx1cn 15495 tx2cn 15496 upxp 15498 txcnmpt 15499 uptx 15500 xmettpos 15596 blrnps 15637 blrn 15638 xmeterval 15661 qtopbasss 15747 cnbl0 15760 cnblcld 15761 cnfldms 15762 tgioo 15780 tgqioo 15781 dvfre 15936 plyreres 15990 reeff1o 15999 pilem1 16006 ioocosf1o 16082 dfrelog 16089 mpodvdsmulf1o 16284 fsumdvdsmul 16285 012of 17228 2o01f 17229 taupi 17330 |
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