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| Mirrors > Home > ILE Home > Th. List > ffvelcdmi | GIF version | ||
| Description: A function's value belongs to its codomain. (Contributed by NM, 6-Apr-2005.) |
| Ref | Expression |
|---|---|
| ffvelcdmi.1 | ⊢ 𝐹:𝐴⟶𝐵 |
| Ref | Expression |
|---|---|
| ffvelcdmi | ⊢ (𝐶 ∈ 𝐴 → (𝐹‘𝐶) ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ffvelcdmi.1 | . 2 ⊢ 𝐹:𝐴⟶𝐵 | |
| 2 | ffvelcdm 5812 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐶 ∈ 𝐴) → (𝐹‘𝐶) ∈ 𝐵) | |
| 3 | 1, 2 | mpan 424 | 1 ⊢ (𝐶 ∈ 𝐴 → (𝐹‘𝐶) ∈ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2205 ⟶wf 5350 ‘cfv 5354 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-sbc 3045 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-br 4112 df-opab 4174 df-id 4416 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-iota 5314 df-fun 5356 df-fn 5357 df-f 5358 df-fv 5362 |
| This theorem is referenced by: omgadd 11174 cjcl 11541 climmpt 11993 cn1lem 12007 climcn1lem 12012 fsumrelem 12165 efcl 12358 sincl 12400 coscl 12401 algcvg 12753 algcvgb 12755 algcvga 12756 algfx 12757 eucalgcvga 12763 eucalg 12764 sqpweven 12880 2sqpwodd 12881 ennnfonelemnn0 13194 relogcl 15776 konigsberglem5 16536 nninfomnilem 16845 |
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