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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 5546 | . 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 |
| This proof depends on syntax axioms: → wi 4 ⊆ wss 3220 ⟶wf 5373 |
| This proof depends on 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 proof 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 5381 |
| This theorem is used by: mapsnd 6970 mapss 6973 ac6sfi 7202 fseq1p1m1 10512 seqf1oglem2 10972 sswrd 11329 resqrexlemcvg 11801 resqrexlemsqa 11806 climcvg1nlem 12134 fsumcl2lem 12184 nninfctlemfo 12836 ennnfonelemh 13347 gzsumress 13765 gzsumwsubmcl 13854 gzsumsubmcl 14226 gsumsubmclfi 14247 gsumressfi 14251 psrbaglefifi 15147 cnrest2 15428 cnptoprest2 15432 cncfss 15775 limccnpcntop 15867 dvidre 15889 dvcoapbr 15899 dvef 15919 plyaddlem 15941 plymullem 15942 plycjlemc 15952 plycn 15954 dvply2g 15958 upgruhgr 16518 umgrupgr 16519 upgr1edc 16528 umgrislfupgrdom 16538 usgrislfuspgrdom 16597 isomninnlem 17245 trilpolemisumle 17254 iswomninnlem 17266 ismkvnnlem 17269 |
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