Theorem antird 5929

Description: Deduce antisymmetry from its properties. (Contributed by SF, 12-Mar-2015.)

Hypotheses

Ref	Expression
antird.1	⊢ (φ → R ∈ V)
antird.2	⊢ (φ → A ∈ W)
antird.3	⊢ ((φ ∧ (x ∈ A ∧ y ∈ A) ∧ (xRy ∧ yRx)) → x = y)

Assertion

Ref	Expression
antird	⊢ (φ → R Antisym A)

Distinct variable groups:   x,A,y   φ,x,y   x,R,y

Allowed substitution hints:   V(x,y)   W(x,y)

Proof of Theorem antird

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

Step	Hyp	Ref	Expression
1		antird.3	. . . 4 ⊢ ((φ ∧ (x ∈ A ∧ y ∈ A) ∧ (xRy ∧ yRx)) → x = y)
2	1	3expia 1153	. . 3 ⊢ ((φ ∧ (x ∈ A ∧ y ∈ A)) → ((xRy ∧ yRx) → x = y))
3	2	ralrimivva 2707	. 2 ⊢ (φ → ∀x ∈ A ∀y ∈ A ((xRy ∧ yRx) → x = y))
4		antird.1	. . 3 ⊢ (φ → R ∈ V)
5		antird.2	. . 3 ⊢ (φ → A ∈ W)
6		breq 4642	. . . . . . 7 ⊢ (r = R → (xry ↔ xRy))
7		breq 4642	. . . . . . 7 ⊢ (r = R → (yrx ↔ yRx))
8	6, 7	anbi12d 691	. . . . . 6 ⊢ (r = R → ((xry ∧ yrx) ↔ (xRy ∧ yRx)))
9	8	imbi1d 308	. . . . 5 ⊢ (r = R → (((xry ∧ yrx) → x = y) ↔ ((xRy ∧ yRx) → x = y)))
10	9	2ralbidv 2657	. . . 4 ⊢ (r = R → (∀x ∈ a ∀y ∈ a ((xry ∧ yrx) → x = y) ↔ ∀x ∈ a ∀y ∈ a ((xRy ∧ yRx) → x = y)))
11		raleq 2808	. . . . 5 ⊢ (a = A → (∀y ∈ a ((xRy ∧ yRx) → x = y) ↔ ∀y ∈ A ((xRy ∧ yRx) → x = y)))
12	11	raleqbi1dv 2816	. . . 4 ⊢ (a = A → (∀x ∈ a ∀y ∈ a ((xRy ∧ yRx) → x = y) ↔ ∀x ∈ A ∀y ∈ A ((xRy ∧ yRx) → x = y)))
13		df-antisym 5902	. . . 4 ⊢ Antisym = {⟨r, a⟩ ∣ ∀x ∈ a ∀y ∈ a ((xry ∧ yrx) → x = y)}
14	10, 12, 13	brabg 4707	. . 3 ⊢ ((R ∈ V ∧ A ∈ W) → (R Antisym A ↔ ∀x ∈ A ∀y ∈ A ((xRy ∧ yRx) → x = y)))
15	4, 5, 14	syl2anc 642	. 2 ⊢ (φ → (R Antisym A ↔ ∀x ∈ A ∀y ∈ A ((xRy ∧ yRx) → x = y)))
16	3, 15	mpbird 223	1 ⊢ (φ → R Antisym A)

Syntax hints:   → wi 4   ↔ wb 176   ∧ wa 358   ∧ w3a 934   = wceq 1642   ∈ wcel 1710  ∀wral 2615   class class class wbr 4640   Antisym cantisym 5891

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-antisym 5902

This theorem is referenced by:  pod  5937