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Theorem r19.28v 3183
Description: Restricted quantifier version of one direction of 19.28 2220. (The other direction holds when 𝐴 is nonempty, see r19.28zv 4442.) (Contributed by NM, 2-Apr-2004.) (Proof shortened by Wolf Lammen, 17-Jun-2023.)
Assertion
Ref Expression
r19.28v ((𝜑 ∧ ∀𝑥𝐴 𝜓) → ∀𝑥𝐴 (𝜑𝜓))
Distinct variable group:   𝜑,𝑥
Allowed substitution hints:   𝜓(𝑥)   𝐴(𝑥)

Proof of Theorem r19.28v
StepHypRef Expression
1 id 22 . . . 4 (𝜑𝜑)
21ralrimivw 3180 . . 3 (𝜑 → ∀𝑥𝐴 𝜑)
32anim1i 614 . 2 ((𝜑 ∧ ∀𝑥𝐴 𝜓) → (∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓))
4 r19.26 3167 . 2 (∀𝑥𝐴 (𝜑𝜓) ↔ (∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓))
53, 4sylibr 235 1 ((𝜑 ∧ ∀𝑥𝐴 𝜓) → ∀𝑥𝐴 (𝜑𝜓))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396  wral 3135
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1787  ax-4 1801  ax-5 1902
This theorem depends on definitions:  df-bi 208  df-an 397  df-ral 3140
This theorem is referenced by:  rr19.28v  3659  fununi  6422  txlm  22184  2reu8i  43189  2reuimp0  43190
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