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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 5491 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐵 ⊆ 𝐶) → 𝐹:𝐴⟶𝐶) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → 𝐹:𝐴⟶𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ⊆ wss 3198 ⟶wf 5320 |
| 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 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-11 1552 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-in 3204 df-ss 3211 df-f 5328 |
| This theorem is referenced by: mapss 6855 ac6sfi 7080 fseq1p1m1 10319 seqf1oglem2 10772 sswrd 11112 resqrexlemcvg 11570 resqrexlemsqa 11575 climcvg1nlem 11900 fsumcl2lem 11949 nninfctlemfo 12601 ennnfonelemh 13015 gsumress 13468 gsumwsubmcl 13569 gsumfzsubmcl 13915 cnrest2 14950 cnptoprest2 14954 cncfss 15297 limccnpcntop 15389 dvidre 15411 dvcoapbr 15421 dvef 15441 plyaddlem 15463 plymullem 15464 plycjlemc 15474 plycn 15476 dvply2g 15480 upgruhgr 15952 umgrupgr 15953 upgr1edc 15962 umgrislfupgrdom 15970 usgrislfuspgrdom 16029 isomninnlem 16570 trilpolemisumle 16578 iswomninnlem 16589 ismkvnnlem 16592 |
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