imakexg - New Foundations Explorer

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Theorem imakexg 4299

Description: The image of a set under a set is a set. (Contributed by SF, 14-Jan-2015.)

**Assertion**
Ref	Expression
imakexg	⊢ ((A ∈ V ∧ B ∈ W) → (A “_k B) ∈ V)

**Proof of Theorem imakexg**
Step	Hyp	Ref	Expression
1		dfimak2 4298	. 2 ⊢ (A “_k B) = ∼ P6 ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V)))
2		1cex 4142	. . . . . 6 ⊢ 1_c ∈ V
3		vvex 4109	. . . . . 6 ⊢ V ∈ V
4	2, 3	xpkex 4289	. . . . 5 ⊢ (1_c ×_k V) ∈ V
5	4	complex 4104	. . . 4 ⊢ ∼ (1_c ×_k V) ∈ V
6		xpkexg 4288	. . . . . . 7 ⊢ ((B ∈ W ∧ V ∈ V) → (B ×_k V) ∈ V)
7	3, 6	mpan2 652	. . . . . 6 ⊢ (B ∈ W → (B ×_k V) ∈ V)
8		inexg 4100	. . . . . 6 ⊢ ((A ∈ V ∧ (B ×_k V) ∈ V) → (A ∩ (B ×_k V)) ∈ V)
9	7, 8	sylan2 460	. . . . 5 ⊢ ((A ∈ V ∧ B ∈ W) → (A ∩ (B ×_k V)) ∈ V)
10		complexg 4099	. . . . 5 ⊢ ((A ∩ (B ×_k V)) ∈ V → ∼ (A ∩ (B ×_k V)) ∈ V)
11		sikexg 4296	. . . . 5 ⊢ ( ∼ (A ∩ (B ×_k V)) ∈ V → SI_k ∼ (A ∩ (B ×_k V)) ∈ V)
12	9, 10, 11	3syl 18	. . . 4 ⊢ ((A ∈ V ∧ B ∈ W) → SI_k ∼ (A ∩ (B ×_k V)) ∈ V)
13		unexg 4101	. . . 4 ⊢ (( ∼ (1_c ×_k V) ∈ V ∧ SI_k ∼ (A ∩ (B ×_k V)) ∈ V) → ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V)
14	5, 12, 13	sylancr 644	. . 3 ⊢ ((A ∈ V ∧ B ∈ W) → ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V)
15		p6exg 4290	. . 3 ⊢ (( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V → P6 ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V)
16		complexg 4099	. . 3 ⊢ ( P6 ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V → ∼ P6 ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V)
17	14, 15, 16	3syl 18	. 2 ⊢ ((A ∈ V ∧ B ∈ W) → ∼ P6 ( ∼ (1_c ×_k V) ∪ SI_k ∼ (A ∩ (B ×_k V))) ∈ V)
18	1, 17	syl5eqel 2437	1 ⊢ ((A ∈ V ∧ B ∈ W) → (A “_k B) ∈ V)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 358 ∈ wcel 1710 Vcvv 2859 ∼ ccompl 3205 ∪ cun 3207 ∩ cin 3208 1_cc1c 4134 ×_k cxpk 4174 P6 cp6 4178 “_k cimak 4179 SI_k csik 4181

This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 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 4078 ax-xp 4079 ax-cnv 4080 ax-1c 4081 ax-si 4083 ax-typlower 4086 ax-sn 4087

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 2478 df-ne 2518 df-ral 2619 df-rex 2620 df-v 2861 df-nin 3211 df-compl 3212 df-in 3213 df-un 3214 df-dif 3215 df-ss 3259 df-nul 3551 df-sn 3741 df-pr 3742 df-opk 4058 df-1c 4136 df-xpk 4185 df-cnvk 4186 df-imak 4189 df-p6 4191 df-sik 4192

This theorem is referenced by: imakex 4300 pw1exg 4302 cokexg 4309 imagekexg 4311 uniexg 4316 intexg 4319 pwexg 4328 addcexg 4393 phiexg 4571 opexg 4587 proj1exg 4591 proj2exg 4592 imaexg 4746 coexg 4749 siexg 4752

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