Theorem refd 5928

Description: Natural deduction form of reflexivity. (Contributed by SF, 20-Mar-2015.)

Hypotheses

Ref	Expression
refd.1	⊢ (φ → R Ref A)
refd.2	⊢ (φ → X ∈ A)

Assertion

Ref	Expression
refd	⊢ (φ → XRX)

Proof of Theorem refd

Dummy variables a r x are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		refd.1	. . 3 ⊢ (φ → R Ref A)
2		brex 4690	. . . . 5 ⊢ (R Ref A → (R ∈ V ∧ A ∈ V))
3		breq 4642	. . . . . . 7 ⊢ (r = R → (xrx ↔ xRx))
4	3	ralbidv 2635	. . . . . 6 ⊢ (r = R → (∀x ∈ a xrx ↔ ∀x ∈ a xRx))
5		raleq 2808	. . . . . 6 ⊢ (a = A → (∀x ∈ a xRx ↔ ∀x ∈ A xRx))
6		df-ref 5901	. . . . . 6 ⊢ Ref = {⟨r, a⟩ ∣ ∀x ∈ a xrx}
7	4, 5, 6	brabg 4707	. . . . 5 ⊢ ((R ∈ V ∧ A ∈ V) → (R Ref A ↔ ∀x ∈ A xRx))
8	2, 7	syl 15	. . . 4 ⊢ (R Ref A → (R Ref A ↔ ∀x ∈ A xRx))
9	8	ibi 232	. . 3 ⊢ (R Ref A → ∀x ∈ A xRx)
10	1, 9	syl 15	. 2 ⊢ (φ → ∀x ∈ A xRx)
11		refd.2	. 2 ⊢ (φ → X ∈ A)
12		id 19	. . . 4 ⊢ (x = X → x = X)
13	12, 12	breq12d 4653	. . 3 ⊢ (x = X → (xRx ↔ XRX))
14	13	rspccv 2953	. 2 ⊢ (∀x ∈ A xRx → (X ∈ A → XRX))
15	10, 11, 14	sylc 56	1 ⊢ (φ → XRX)

Syntax hints:   → wi 4   ↔ wb 176   ∧ wa 358   = wceq 1642   ∈ wcel 1710  ∀wral 2615  Vcvv 2860   class class class wbr 4640   Ref cref 5890

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-13 1712  ax-14 1714  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4079  ax-xp 4080  ax-cnv 4081  ax-1c 4082  ax-sset 4083  ax-si 4084  ax-ins2 4085  ax-ins3 4086  ax-typlower 4087  ax-sn 4088

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2208  df-mo 2209  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-ne 2519  df-ral 2620  df-rex 2621  df-reu 2622  df-rmo 2623  df-rab 2624  df-v 2862  df-sbc 3048  df-nin 3212  df-compl 3213  df-in 3214  df-un 3215  df-dif 3216  df-symdif 3217  df-ss 3260  df-pss 3262  df-nul 3552  df-if 3664  df-pw 3725  df-sn 3742  df-pr 3743  df-uni 3893  df-int 3928  df-opk 4059  df-1c 4137  df-pw1 4138  df-uni1 4139  df-xpk 4186  df-cnvk 4187  df-ins2k 4188  df-ins3k 4189  df-imak 4190  df-cok 4191  df-p6 4192  df-sik 4193  df-ssetk 4194  df-imagek 4195  df-idk 4196  df-iota 4340  df-0c 4378  df-addc 4379  df-nnc 4380  df-fin 4381  df-lefin 4441  df-ltfin 4442  df-ncfin 4443  df-tfin 4444  df-evenfin 4445  df-oddfin 4446  df-sfin 4447  df-spfin 4448  df-phi 4566  df-op 4567  df-proj1 4568  df-proj2 4569  df-opab 4624  df-br 4641  df-ref 5901

This theorem is referenced by:  weds  5939