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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 5485 | . 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 3197 ⟶wf 5314 |
| 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 3203 df-ss 3210 df-f 5322 |
| This theorem is referenced by: mapss 6846 ac6sfi 7068 fseq1p1m1 10302 seqf1oglem2 10754 sswrd 11093 resqrexlemcvg 11545 resqrexlemsqa 11550 climcvg1nlem 11875 fsumcl2lem 11924 nninfctlemfo 12576 ennnfonelemh 12990 gsumress 13443 gsumwsubmcl 13544 gsumfzsubmcl 13890 cnrest2 14925 cnptoprest2 14929 cncfss 15272 limccnpcntop 15364 dvidre 15386 dvcoapbr 15396 dvef 15416 plyaddlem 15438 plymullem 15439 plycjlemc 15449 plycn 15451 dvply2g 15455 upgruhgr 15926 umgrupgr 15927 upgr1edc 15936 umgrislfupgrdom 15944 usgrislfuspgrdom 16003 isomninnlem 16458 trilpolemisumle 16466 iswomninnlem 16477 ismkvnnlem 16480 |
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