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| Mirrors > Home > MPE Home > Th. List > isf34lem2 | Structured version Visualization version GIF version | ||
| Description: Lemma for isfin3-4 10298. (Contributed by Stefan O'Rear, 7-Nov-2014.) |
| Ref | Expression |
|---|---|
| compss.a | ⊢ 𝐹 = (𝑥 ∈ 𝒫 𝐴 ↦ (𝐴 ∖ 𝑥)) |
| Ref | Expression |
|---|---|
| isf34lem2 | ⊢ (𝐴 ∈ 𝑉 → 𝐹:𝒫 𝐴⟶𝒫 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | difss 4077 | . . . 4 ⊢ (𝐴 ∖ 𝑥) ⊆ 𝐴 | |
| 2 | elpw2g 5271 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ((𝐴 ∖ 𝑥) ∈ 𝒫 𝐴 ↔ (𝐴 ∖ 𝑥) ⊆ 𝐴)) | |
| 3 | 1, 2 | mpbiri 258 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∖ 𝑥) ∈ 𝒫 𝐴) |
| 4 | 3 | adantr 480 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ 𝒫 𝐴) → (𝐴 ∖ 𝑥) ∈ 𝒫 𝐴) |
| 5 | compss.a | . 2 ⊢ 𝐹 = (𝑥 ∈ 𝒫 𝐴 ↦ (𝐴 ∖ 𝑥)) | |
| 6 | 4, 5 | fmptd 7061 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐹:𝒫 𝐴⟶𝒫 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ∖ cdif 3887 ⊆ wss 3890 𝒫 cpw 4542 ↦ cmpt 5167 ⟶wf 6489 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-pr 5371 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-fun 6495 df-fn 6496 df-f 6497 |
| This theorem is referenced by: isf34lem5 10294 isf34lem7 10295 isf34lem6 10296 |
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