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| Mirrors > Home > ILE Home > Th. List > fssd | GIF version | ||
| Description: Expanding the codomain of a mapping, deduction form. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| fssd.f | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
| fssd.b | ⊢ (𝜑 → 𝐵 ⊆ 𝐶) |
| Ref | Expression |
|---|---|
| fssd | ⊢ (𝜑 → 𝐹:𝐴⟶𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fssd.f | . 2 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
| 2 | fssd.b | . 2 ⊢ (𝜑 → 𝐵 ⊆ 𝐶) | |
| 3 | fss 5541 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐵 ⊆ 𝐶) → 𝐹:𝐴⟶𝐶) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → 𝐹:𝐴⟶𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ⊆ wss 3220 ⟶wf 5368 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-f 5376 |
| This theorem is referenced by: mapsnd 6960 mapss 6963 ac6sfi 7192 fseq1p1m1 10479 seqf1oglem2 10935 sswrd 11291 resqrexlemcvg 11763 resqrexlemsqa 11768 climcvg1nlem 12093 fsumcl2lem 12143 nninfctlemfo 12795 ennnfonelemh 13273 gzsumress 13689 gzsumwsubmcl 13778 gzsumsubmcl 14119 gsumsubmclfi 14140 gsumressfi 14144 cnrest2 15260 cnptoprest2 15264 cncfss 15607 limccnpcntop 15699 dvidre 15721 dvcoapbr 15731 dvef 15751 plyaddlem 15773 plymullem 15774 plycjlemc 15784 plycn 15786 dvply2g 15790 upgruhgr 16266 umgrupgr 16267 upgr1edc 16276 umgrislfupgrdom 16286 usgrislfuspgrdom 16345 isomninnlem 16984 trilpolemisumle 16992 iswomninnlem 17004 ismkvnnlem 17007 |
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