Theorem r19.26 2669

Description: Theorem 19.26 of [Margaris] p. 90 with restricted quantifiers. (Contributed by NM, 28-Jan-1997.) (Proof shortened by Andrew Salmon, 30-May-2011.)

Assertion

Ref	Expression
r19.26	⊢ (∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓) ↔ (∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐴 𝜓))

Proof of Theorem r19.26

Step	Hyp	Ref	Expression
1		simpl 109	. . . 4 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
2	1	ralimi 2605	. . 3 ⊢ (∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓) → ∀𝑥 ∈ 𝐴 𝜑)
3		simpr 110	. . . 4 ⊢ ((𝜑 ∧ 𝜓) → 𝜓)
4	3	ralimi 2605	. . 3 ⊢ (∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓) → ∀𝑥 ∈ 𝐴 𝜓)
5	2, 4	jca 306	. 2 ⊢ (∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓) → (∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐴 𝜓))
6		pm3.2 139	. . . 4 ⊢ (𝜑 → (𝜓 → (𝜑 ∧ 𝜓)))
7	6	ral2imi 2607	. . 3 ⊢ (∀𝑥 ∈ 𝐴 𝜑 → (∀𝑥 ∈ 𝐴 𝜓 → ∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓)))
8	7	imp 124	. 2 ⊢ ((∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐴 𝜓) → ∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓))
9	5, 8	impbii 126	1 ⊢ (∀𝑥 ∈ 𝐴 (𝜑 ∧ 𝜓) ↔ (∀𝑥 ∈ 𝐴 𝜑 ∧ ∀𝑥 ∈ 𝐴 𝜓))

Syntax hints:   ∧ wa 104   ↔ wb 105  ∀wral 2520

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-5 1496  ax-gen 1498

This theorem depends on definitions:  df-bi 117  df-ral 2525

This theorem is referenced by:  r19.27v  2670  r19.28v  2671  r19.26-2  2672  r19.26-3  2673  ralbiim  2677  r19.27av  2678  reu8  3013  ssrab  3316  r19.28m  3599  r19.27m  3605  2ralunsn  3903  iuneq2  4007  cnvpom  5305  funco  5392  fncnv  5422  funimaexglem  5439  fnres  5475  fnopabg  5482  mpteqb  5768  eqfnfv3  5777  caoftrn  6299  iinerm  6841  ixpeq2  6947  ixpin  6958  rexanuz  11673  recvguniq  11680  cau3lem  11799  rexanre  11905  bezoutlemmo  12702  sqrt2irr  12859  pc11  13029  issubg3  13909  issubg4m  13910  ringsrg  14191  tgval2  14916  metequiv  15360  metequiv2  15361  mulcncflem  15472  2sqlem6  15993  vtxd0nedgbfi  16294  uspgr2wlkeq  16360  upgr2wlkdc  16372  bj-indind  16702