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Theorem mreuni 17553
Description: Since the entire base set of a Moore collection is the greatest element of it, the base set can be recovered from a Moore collection by set union. (Contributed by Stefan O'Rear, 30-Jan-2015.)
Assertion
Ref Expression
mreuni (𝐶 ∈ (Moore‘𝑋) → 𝐶 = 𝑋)

Proof of Theorem mreuni
StepHypRef Expression
1 mre1cl 17547 . 2 (𝐶 ∈ (Moore‘𝑋) → 𝑋𝐶)
2 mresspw 17545 . 2 (𝐶 ∈ (Moore‘𝑋) → 𝐶 ⊆ 𝒫 𝑋)
3 elpwuni 5034 . . 3 (𝑋𝐶 → (𝐶 ⊆ 𝒫 𝑋 𝐶 = 𝑋))
43biimpa 477 . 2 ((𝑋𝐶𝐶 ⊆ 𝒫 𝑋) → 𝐶 = 𝑋)
51, 2, 4syl2anc 590 1 (𝐶 ∈ (Moore‘𝑋) → 𝐶 = 𝑋)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1547  wcel 2119  wss 3883  𝒫 cpw 4529   cuni 4838  cfv 6485  Moorecmre 17535
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-sep 5218  ax-nul 5228  ax-pow 5294  ax-pr 5362
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ne 2935  df-ral 3054  df-rex 3064  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4262  df-if 4455  df-pw 4531  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-br 5073  df-opab 5135  df-mpt 5154  df-id 5513  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-iota 6441  df-fun 6487  df-fv 6493  df-mre 17539
This theorem is referenced by:  mreunirn  17554  mrcfval  17565  mrcssv  17571  mrisval  17587  mrelatlub  18519  mreclatBAD  18520  mreuniss  49390  clduni  49391  mreclat  49487
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