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Theorem rexuz 12893
Description: Restricted existential quantification in an upper set of integers. (Contributed by NM, 9-Sep-2005.)
Assertion
Ref Expression
rexuz (𝑀 ∈ ℤ → (∃𝑛 ∈ (ℤ𝑀)𝜑 ↔ ∃𝑛 ∈ ℤ (𝑀𝑛𝜑)))
Distinct variable group:   𝑛,𝑀
Allowed substitution hint:   𝜑(𝑛)

Proof of Theorem rexuz
StepHypRef Expression
1 eluz1 12837 . . . 4 (𝑀 ∈ ℤ → (𝑛 ∈ (ℤ𝑀) ↔ (𝑛 ∈ ℤ ∧ 𝑀𝑛)))
21anbi1d 640 . . 3 (𝑀 ∈ ℤ → ((𝑛 ∈ (ℤ𝑀) ∧ 𝜑) ↔ ((𝑛 ∈ ℤ ∧ 𝑀𝑛) ∧ 𝜑)))
3 anass 472 . . 3 (((𝑛 ∈ ℤ ∧ 𝑀𝑛) ∧ 𝜑) ↔ (𝑛 ∈ ℤ ∧ (𝑀𝑛𝜑)))
42, 3bitrdi 289 . 2 (𝑀 ∈ ℤ → ((𝑛 ∈ (ℤ𝑀) ∧ 𝜑) ↔ (𝑛 ∈ ℤ ∧ (𝑀𝑛𝜑))))
54rexbidv2 3181 1 (𝑀 ∈ ℤ → (∃𝑛 ∈ (ℤ𝑀)𝜑 ↔ ∃𝑛 ∈ ℤ (𝑀𝑛𝜑)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 399  wcel 2141  wrex 3085   class class class wbr 5097  cfv 6516  cle 11211  cz 12562  cuz 12833
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5243  ax-pr 5387  ax-cnex 11123  ax-resscn 11124
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3or 1098  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ral 3076  df-rex 3086  df-rab 3414  df-v 3455  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4284  df-if 4478  df-pw 4554  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4863  df-br 5098  df-opab 5160  df-mpt 5179  df-id 5538  df-xp 5649  df-rel 5650  df-cnv 5651  df-co 5652  df-dm 5653  df-iota 6472  df-fun 6518  df-fv 6524  df-ov 7394  df-neg 11411  df-z 12563  df-uz 12834
This theorem is referenced by: (None)
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