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Theorem elimapw13 4947
Description: Membership in an image under three unit power classes. (Contributed by set.mm contributors, 18-Mar-2015.)
Assertion
Ref Expression
elimapw13 (A (B111C) ↔ x C {{{x}}}, A B)
Distinct variable groups:   x,A   x,B   x,C

Proof of Theorem elimapw13
Dummy variable t is distinct from all other variables.
StepHypRef Expression
1 elimapw12 4946 . 2 (A (B111C) ↔ t 1 C{{t}}, A B)
2 df-rex 2621 . . 3 (t 1 C{{t}}, A Bt(t 1C {{t}}, A B))
3 elpw1 4145 . . . . . . . 8 (t 1Cx C t = {x})
43anbi1i 676 . . . . . . 7 ((t 1C {{t}}, A B) ↔ (x C t = {x} {{t}}, A B))
5 r19.41v 2765 . . . . . . 7 (x C (t = {x} {{t}}, A B) ↔ (x C t = {x} {{t}}, A B))
64, 5bitr4i 243 . . . . . 6 ((t 1C {{t}}, A B) ↔ x C (t = {x} {{t}}, A B))
76exbii 1582 . . . . 5 (t(t 1C {{t}}, A B) ↔ tx C (t = {x} {{t}}, A B))
8 rexcom4 2879 . . . . 5 (x C t(t = {x} {{t}}, A B) ↔ tx C (t = {x} {{t}}, A B))
97, 8bitr4i 243 . . . 4 (t(t 1C {{t}}, A B) ↔ x C t(t = {x} {{t}}, A B))
10 snex 4112 . . . . . 6 {x} V
11 sneq 3745 . . . . . . . . 9 (t = {x} → {t} = {{x}})
1211sneqd 3747 . . . . . . . 8 (t = {x} → {{t}} = {{{x}}})
1312opeq1d 4585 . . . . . . 7 (t = {x} → {{t}}, A = {{{x}}}, A)
1413eleq1d 2419 . . . . . 6 (t = {x} → ({{t}}, A B{{{x}}}, A B))
1510, 14ceqsexv 2895 . . . . 5 (t(t = {x} {{t}}, A B) ↔ {{{x}}}, A B)
1615rexbii 2640 . . . 4 (x C t(t = {x} {{t}}, A B) ↔ x C {{{x}}}, A B)
179, 16bitri 240 . . 3 (t(t 1C {{t}}, A B) ↔ x C {{{x}}}, A B)
182, 17bitri 240 . 2 (t 1 C{{t}}, A Bx C {{{x}}}, A B)
191, 18bitri 240 1 (A (B111C) ↔ x C {{{x}}}, A B)
Colors of variables: wff setvar class
Syntax hints:  wb 176   wa 358  wex 1541   = wceq 1642   wcel 1710  wrex 2616  {csn 3738  1cpw1 4136  cop 4562  cima 4723
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-13 1712  ax-14 1714  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-sset 4083  ax-si 4084  ax-ins2 4085  ax-ins3 4086  ax-typlower 4087  ax-sn 4088
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2208  df-mo 2209  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-ne 2519  df-ral 2620  df-rex 2621  df-reu 2622  df-rmo 2623  df-rab 2624  df-v 2862  df-sbc 3048  df-nin 3212  df-compl 3213  df-in 3214  df-un 3215  df-dif 3216  df-symdif 3217  df-ss 3260  df-pss 3262  df-nul 3552  df-if 3664  df-pw 3725  df-sn 3742  df-pr 3743  df-uni 3893  df-int 3928  df-opk 4059  df-1c 4137  df-pw1 4138  df-uni1 4139  df-xpk 4186  df-cnvk 4187  df-ins2k 4188  df-ins3k 4189  df-imak 4190  df-cok 4191  df-p6 4192  df-sik 4193  df-ssetk 4194  df-imagek 4195  df-idk 4196  df-iota 4340  df-0c 4378  df-addc 4379  df-nnc 4380  df-fin 4381  df-lefin 4441  df-ltfin 4442  df-ncfin 4443  df-tfin 4444  df-evenfin 4445  df-oddfin 4446  df-sfin 4447  df-spfin 4448  df-phi 4566  df-op 4567  df-proj1 4568  df-proj2 4569  df-br 4641  df-ima 4728
This theorem is referenced by:  nchoicelem11  6300  nchoicelem16  6305
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