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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 7421 updjudhcoinrg 7422 updjud 7423 omp1eomlem 7435 dfz2 9722 uzn0 9948 unirnioo 10386 dfioo2 10387 ioorebasg 10388 fzen 10458 fseq1p1m1 10512 2ffzeq 10559 fvinim0ffz 10671 frecuzrdglem 10863 frecuzrdgtcl 10864 frecuzrdg0 10865 frecuzrdgfunlem 10871 frecuzrdg0t 10874 seq3val 10912 seqvalcd 10913 ser0f 10986 ffz0hash 11292 fnfzo0hash 11294 wrdred1hash 11364 shftf 11611 uzin2 11769 rexanuz 11770 prodf1f 12329 eff2 12466 reeff1 12486 tanvalap 12494 1arithlem4 13168 1arith 13169 isgrpinv 13912 kerf1ghm 14130 cnfldadd 14983 cnfldmul 14985 cnfldplusf 14995 cnfldsub 14996 znunit 15078 psrbaglecl 15144 lmbr2 15406 cncnpi 15420 cncnp 15422 cnpdis 15434 lmff 15441 tx1cn 15461 tx2cn 15462 upxp 15464 txcnmpt 15465 uptx 15466 xmettpos 15562 blrnps 15603 blrn 15604 xmeterval 15627 qtopbasss 15713 cnbl0 15726 cnblcld 15727 cnfldms 15728 tgioo 15746 tgqioo 15747 dvfre 15902 plyreres 15956 reeff1o 15965 pilem1 15972 ioocosf1o 16047 dfrelog 16053 mpodvdsmulf1o 16245 fsumdvdsmul 16246 012of 17189 2o01f 17190 taupi 17290 |
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