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Mirrors > Home > NFE Home > Th. List > pw1exg | GIF version |
Description: The unit power class preserves sethood. (Contributed by SF, 14-Jan-2015.) |
Ref | Expression |
---|---|
pw1exg | ⊢ (A ∈ V → ℘1A ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfpw12 4302 | . 2 ⊢ ℘1A = ( SIk (A ×k A) “k V) | |
2 | xpkexg 4289 | . . . . 5 ⊢ ((A ∈ V ∧ A ∈ V) → (A ×k A) ∈ V) | |
3 | 2 | anidms 626 | . . . 4 ⊢ (A ∈ V → (A ×k A) ∈ V) |
4 | sikexg 4297 | . . . 4 ⊢ ((A ×k A) ∈ V → SIk (A ×k A) ∈ V) | |
5 | 3, 4 | syl 15 | . . 3 ⊢ (A ∈ V → SIk (A ×k A) ∈ V) |
6 | vvex 4110 | . . 3 ⊢ V ∈ V | |
7 | imakexg 4300 | . . 3 ⊢ (( SIk (A ×k A) ∈ V ∧ V ∈ V) → ( SIk (A ×k A) “k V) ∈ V) | |
8 | 5, 6, 7 | sylancl 643 | . 2 ⊢ (A ∈ V → ( SIk (A ×k A) “k V) ∈ V) |
9 | 1, 8 | syl5eqel 2437 | 1 ⊢ (A ∈ V → ℘1A ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 1710 Vcvv 2860 ℘1cpw1 4136 ×k cxpk 4175 “k cimak 4180 SIk csik 4182 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 ax-nin 4079 ax-xp 4080 ax-cnv 4081 ax-1c 4082 ax-si 4084 ax-typlower 4087 ax-sn 4088 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-3an 936 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-v 2862 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-ss 3260 df-nul 3552 df-pw 3725 df-sn 3742 df-pr 3743 df-opk 4059 df-1c 4137 df-pw1 4138 df-xpk 4186 df-cnvk 4187 df-imak 4190 df-p6 4192 df-sik 4193 |
This theorem is referenced by: pw1ex 4304 pw1exb 4327 pwexg 4329 addcexg 4394 ncfintfin 4496 imaexg 4747 coexg 4750 siexg 4753 qsexg 5983 pw1eltc 6163 ncpw1pwneg 6202 ltcpw1pwg 6203 tcncg 6225 canncb 6333 |
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