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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 5381 | . 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 4775 Fn wfn 5372 ⟶wf 5373 |
| 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 5381 |
| This theorem is used by: ffnd 5534 ffun 5536 frel 5538 fdm 5539 ffrn 5545 fresin 5568 fresaunres2disj 5570 fcoi1 5572 feu 5574 f0bi 5585 fnconstg 5590 f1fn 5600 fofn 5617 dffo2 5619 fimadmfo 5624 f1ofn 5640 fdmeu 5746 feqmptd 5756 fvco3 5776 ffvelcdm 5841 dff2 5852 dffo3 5855 dffo4 5856 dffo5 5857 f1ompt 5859 ffnfv 5866 fcompt 5878 fsn2 5882 fconst2g 5930 fconstfvm 5933 fdmexb 5939 fex 5947 dff13 5974 cocan1 5993 off 6315 suppssof1 6320 ofco 6321 caofref 6327 caofrss 6334 caoftrn 6335 fo1stresm 6395 fo2ndresm 6396 1stcof 6397 2ndcof 6398 fo2ndf 6463 fsuppeq 6487 fsuppeqg 6488 tposf2 6539 smoiso 6573 tfrcllemssrecs 6623 tfrcllemsucaccv 6625 elmapfn 6952 mapsnd 6970 mapsn 6972 pw2f1odclem 7134 mapen 7146 mapunen 7151 updjudhcoinlf 7420 updjudhcoinrg 7421 updjud 7422 omp1eomlem 7434 dfz2 9721 uzn0 9947 unirnioo 10385 dfioo2 10386 ioorebasg 10387 fzen 10457 fseq1p1m1 10511 2ffzeq 10558 fvinim0ffz 10670 frecuzrdglem 10861 frecuzrdgtcl 10862 frecuzrdg0 10863 frecuzrdgfunlem 10869 frecuzrdg0t 10872 seq3val 10910 seqvalcd 10911 ser0f 10984 ffz0hash 11290 fnfzo0hash 11292 wrdred1hash 11362 shftf 11609 uzin2 11767 rexanuz 11768 prodf1f 12326 eff2 12463 reeff1 12483 tanvalap 12491 1arithlem4 13165 1arith 13166 isgrpinv 13908 kerf1ghm 14126 cnfldadd 14948 cnfldmul 14950 cnfldplusf 14960 cnfldsub 14961 znunit 15043 psrbaglecl 15109 lmbr2 15364 cncnpi 15378 cncnp 15380 cnpdis 15392 lmff 15399 tx1cn 15419 tx2cn 15420 upxp 15422 txcnmpt 15423 uptx 15424 xmettpos 15520 blrnps 15561 blrn 15562 xmeterval 15585 qtopbasss 15671 cnbl0 15684 cnblcld 15685 cnfldms 15686 tgioo 15704 tgqioo 15705 dvfre 15860 plyreres 15914 reeff1o 15923 pilem1 15930 ioocosf1o 16005 dfrelog 16011 mpodvdsmulf1o 16185 fsumdvdsmul 16186 012of 17121 2o01f 17122 taupi 17221 |
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