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Theorem elrealeu 7770
Description: The real number mapping in elreal 7769 is unique. (Contributed by Jim Kingdon, 11-Jul-2021.)
Assertion
Ref Expression
elrealeu (𝐴 ∈ ℝ ↔ ∃!𝑥R𝑥, 0R⟩ = 𝐴)
Distinct variable group:   𝑥,𝐴

Proof of Theorem elrealeu
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 elreal 7769 . . . 4 (𝐴 ∈ ℝ ↔ ∃𝑥R𝑥, 0R⟩ = 𝐴)
21biimpi 119 . . 3 (𝐴 ∈ ℝ → ∃𝑥R𝑥, 0R⟩ = 𝐴)
3 eqtr3 2185 . . . . . . . 8 ((⟨𝑥, 0R⟩ = 𝐴 ∧ ⟨𝑦, 0R⟩ = 𝐴) → ⟨𝑥, 0R⟩ = ⟨𝑦, 0R⟩)
4 0r 7691 . . . . . . . . . 10 0RR
5 opthg 4216 . . . . . . . . . 10 ((𝑥R ∧ 0RR) → (⟨𝑥, 0R⟩ = ⟨𝑦, 0R⟩ ↔ (𝑥 = 𝑦 ∧ 0R = 0R)))
64, 5mpan2 422 . . . . . . . . 9 (𝑥R → (⟨𝑥, 0R⟩ = ⟨𝑦, 0R⟩ ↔ (𝑥 = 𝑦 ∧ 0R = 0R)))
76ad2antlr 481 . . . . . . . 8 (((𝐴 ∈ ℝ ∧ 𝑥R) ∧ 𝑦R) → (⟨𝑥, 0R⟩ = ⟨𝑦, 0R⟩ ↔ (𝑥 = 𝑦 ∧ 0R = 0R)))
83, 7syl5ib 153 . . . . . . 7 (((𝐴 ∈ ℝ ∧ 𝑥R) ∧ 𝑦R) → ((⟨𝑥, 0R⟩ = 𝐴 ∧ ⟨𝑦, 0R⟩ = 𝐴) → (𝑥 = 𝑦 ∧ 0R = 0R)))
9 simpl 108 . . . . . . 7 ((𝑥 = 𝑦 ∧ 0R = 0R) → 𝑥 = 𝑦)
108, 9syl6 33 . . . . . 6 (((𝐴 ∈ ℝ ∧ 𝑥R) ∧ 𝑦R) → ((⟨𝑥, 0R⟩ = 𝐴 ∧ ⟨𝑦, 0R⟩ = 𝐴) → 𝑥 = 𝑦))
1110ralrimiva 2539 . . . . 5 ((𝐴 ∈ ℝ ∧ 𝑥R) → ∀𝑦R ((⟨𝑥, 0R⟩ = 𝐴 ∧ ⟨𝑦, 0R⟩ = 𝐴) → 𝑥 = 𝑦))
1211ralrimiva 2539 . . . 4 (𝐴 ∈ ℝ → ∀𝑥R𝑦R ((⟨𝑥, 0R⟩ = 𝐴 ∧ ⟨𝑦, 0R⟩ = 𝐴) → 𝑥 = 𝑦))
13 opeq1 3758 . . . . . 6 (𝑥 = 𝑦 → ⟨𝑥, 0R⟩ = ⟨𝑦, 0R⟩)
1413eqeq1d 2174 . . . . 5 (𝑥 = 𝑦 → (⟨𝑥, 0R⟩ = 𝐴 ↔ ⟨𝑦, 0R⟩ = 𝐴))
1514rmo4 2919 . . . 4 (∃*𝑥R𝑥, 0R⟩ = 𝐴 ↔ ∀𝑥R𝑦R ((⟨𝑥, 0R⟩ = 𝐴 ∧ ⟨𝑦, 0R⟩ = 𝐴) → 𝑥 = 𝑦))
1612, 15sylibr 133 . . 3 (𝐴 ∈ ℝ → ∃*𝑥R𝑥, 0R⟩ = 𝐴)
17 reu5 2678 . . 3 (∃!𝑥R𝑥, 0R⟩ = 𝐴 ↔ (∃𝑥R𝑥, 0R⟩ = 𝐴 ∧ ∃*𝑥R𝑥, 0R⟩ = 𝐴))
182, 16, 17sylanbrc 414 . 2 (𝐴 ∈ ℝ → ∃!𝑥R𝑥, 0R⟩ = 𝐴)
19 reurex 2679 . . 3 (∃!𝑥R𝑥, 0R⟩ = 𝐴 → ∃𝑥R𝑥, 0R⟩ = 𝐴)
2019, 1sylibr 133 . 2 (∃!𝑥R𝑥, 0R⟩ = 𝐴𝐴 ∈ ℝ)
2118, 20impbii 125 1 (𝐴 ∈ ℝ ↔ ∃!𝑥R𝑥, 0R⟩ = 𝐴)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  wb 104   = wceq 1343  wcel 2136  wral 2444  wrex 2445  ∃!wreu 2446  ∃*wrmo 2447  cop 3579  Rcnr 7238  0Rc0r 7239  cr 7752
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-coll 4097  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411  ax-setind 4514  ax-iinf 4565
This theorem depends on definitions:  df-bi 116  df-dc 825  df-3or 969  df-3an 970  df-tru 1346  df-fal 1349  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ne 2337  df-ral 2449  df-rex 2450  df-reu 2451  df-rmo 2452  df-rab 2453  df-v 2728  df-sbc 2952  df-csb 3046  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-int 3825  df-iun 3868  df-br 3983  df-opab 4044  df-mpt 4045  df-tr 4081  df-eprel 4267  df-id 4271  df-po 4274  df-iso 4275  df-iord 4344  df-on 4346  df-suc 4349  df-iom 4568  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-ov 5845  df-oprab 5846  df-mpo 5847  df-1st 6108  df-2nd 6109  df-recs 6273  df-irdg 6338  df-1o 6384  df-oadd 6388  df-omul 6389  df-er 6501  df-ec 6503  df-qs 6507  df-ni 7245  df-pli 7246  df-mi 7247  df-lti 7248  df-plpq 7285  df-mpq 7286  df-enq 7288  df-nqqs 7289  df-plqqs 7290  df-mqqs 7291  df-1nqqs 7292  df-rq 7293  df-ltnqqs 7294  df-inp 7407  df-i1p 7408  df-enr 7667  df-nr 7668  df-0r 7672  df-r 7763
This theorem is referenced by:  axcaucvglemcl  7836  axcaucvglemval  7838
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