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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 5521 | . 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 3211 ⟶wf 5348 |
| 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 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-11 1555 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-in 3217 df-ss 3224 df-f 5356 |
| This theorem is referenced by: mapsnd 6923 mapss 6926 ac6sfi 7155 fseq1p1m1 10428 seqf1oglem2 10882 sswrd 11233 resqrexlemcvg 11704 resqrexlemsqa 11709 climcvg1nlem 12034 fsumcl2lem 12084 nninfctlemfo 12736 ennnfonelemh 13155 gsumress 13608 gsumwsubmcl 13709 gsumfzsubmcl 14055 cnrest2 15101 cnptoprest2 15105 cncfss 15448 limccnpcntop 15540 dvidre 15562 dvcoapbr 15572 dvef 15592 plyaddlem 15614 plymullem 15615 plycjlemc 15625 plycn 15627 dvply2g 15631 upgruhgr 16106 umgrupgr 16107 upgr1edc 16116 umgrislfupgrdom 16126 usgrislfuspgrdom 16185 isomninnlem 16814 trilpolemisumle 16822 iswomninnlem 16834 ismkvnnlem 16837 |
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