Theorem enqer 7553

Description: The equivalence relation for positive fractions is an equivalence relation. Proposition 9-2.1 of [Gleason] p. 117. (Contributed by NM, 27-Aug-1995.) (Revised by Mario Carneiro, 6-Jul-2015.)

Assertion

Ref	Expression
enqer	⊢ ~Q Er (N × N)

Proof of Theorem enqer

Dummy variables 𝑥 𝑦 𝑧 𝑤 𝑣 𝑢 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-enq 7542	. 2 ⊢ ~Q = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (N × N) ∧ 𝑦 ∈ (N × N)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 ·N 𝑢) = (𝑤 ·N 𝑣)))}
2		mulcompig 7526	. 2 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N) → (𝑥 ·N 𝑦) = (𝑦 ·N 𝑥))
3		mulclpi 7523	. 2 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N) → (𝑥 ·N 𝑦) ∈ N)
4		mulasspig 7527	. 2 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N ∧ 𝑧 ∈ N) → ((𝑥 ·N 𝑦) ·N 𝑧) = (𝑥 ·N (𝑦 ·N 𝑧)))
5		mulcanpig 7530	. . 3 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N ∧ 𝑧 ∈ N) → ((𝑥 ·N 𝑦) = (𝑥 ·N 𝑧) ↔ 𝑦 = 𝑧))
6	5	biimpd 144	. 2 ⊢ ((𝑥 ∈ N ∧ 𝑦 ∈ N ∧ 𝑧 ∈ N) → ((𝑥 ·N 𝑦) = (𝑥 ·N 𝑧) → 𝑦 = 𝑧))
7	1, 2, 3, 4, 6	ecopoverg 6791	1 ⊢ ~Q Er (N × N)

Syntax hints:   ∧ w3a 1002   = wceq 1395   ∈ wcel 2200   × cxp 4717  (class class class)co 6007   Er wer 6685  Ncnpi 7467   ·_N cmi 7469   ~_Q ceq 7474

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-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-nul 4210  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-iinf 4680

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-tr 4183  df-id 4384  df-iord 4457  df-on 4459  df-suc 4462  df-iom 4683  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-ov 6010  df-oprab 6011  df-mpo 6012  df-1st 6292  df-2nd 6293  df-recs 6457  df-irdg 6522  df-oadd 6572  df-omul 6573  df-er 6688  df-ni 7499  df-mi 7501  df-enq 7542

This theorem is referenced by:  enqeceq  7554  0nnq  7559  addpipqqs  7565  mulpipqqs  7568  ordpipqqs  7569  mulcanenqec  7581