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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 5523 | . 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 3213 ⟶wf 5350 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-in 3219 df-ss 3226 df-f 5358 |
| This theorem is referenced by: mapsnd 6925 mapss 6928 ac6sfi 7157 fseq1p1m1 10432 seqf1oglem2 10886 sswrd 11237 resqrexlemcvg 11708 resqrexlemsqa 11713 climcvg1nlem 12038 fsumcl2lem 12088 nninfctlemfo 12740 ennnfonelemh 13172 gsumress 13625 gsumwsubmcl 13726 gsumfzsubmcl 14072 cnrest2 15118 cnptoprest2 15122 cncfss 15465 limccnpcntop 15557 dvidre 15579 dvcoapbr 15589 dvef 15609 plyaddlem 15631 plymullem 15632 plycjlemc 15642 plycn 15644 dvply2g 15648 upgruhgr 16123 umgrupgr 16124 upgr1edc 16133 umgrislfupgrdom 16143 usgrislfuspgrdom 16202 isomninnlem 16831 trilpolemisumle 16839 iswomninnlem 16851 ismkvnnlem 16854 |
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