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Theorem rexuz 9654
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 9605 . . . 4 (𝑀 ∈ ℤ → (𝑛 ∈ (ℤ𝑀) ↔ (𝑛 ∈ ℤ ∧ 𝑀𝑛)))
21anbi1d 465 . . 3 (𝑀 ∈ ℤ → ((𝑛 ∈ (ℤ𝑀) ∧ 𝜑) ↔ ((𝑛 ∈ ℤ ∧ 𝑀𝑛) ∧ 𝜑)))
3 anass 401 . . 3 (((𝑛 ∈ ℤ ∧ 𝑀𝑛) ∧ 𝜑) ↔ (𝑛 ∈ ℤ ∧ (𝑀𝑛𝜑)))
42, 3bitrdi 196 . 2 (𝑀 ∈ ℤ → ((𝑛 ∈ (ℤ𝑀) ∧ 𝜑) ↔ (𝑛 ∈ ℤ ∧ (𝑀𝑛𝜑))))
54rexbidv2 2500 1 (𝑀 ∈ ℤ → (∃𝑛 ∈ (ℤ𝑀)𝜑 ↔ ∃𝑛 ∈ ℤ (𝑀𝑛𝜑)))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105  wcel 2167  wrex 2476   class class class wbr 4033  cfv 5258  cle 8062  cz 9326  cuz 9601
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-cnex 7970  ax-resscn 7971
This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-rab 2484  df-v 2765  df-sbc 2990  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-iota 5219  df-fun 5260  df-fv 5266  df-ov 5925  df-neg 8200  df-z 9327  df-uz 9602
This theorem is referenced by: (None)
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