Theorem prop 7695

Description: A positive real is an ordered pair of a lower cut and an upper cut. (Contributed by Jim Kingdon, 27-Sep-2019.)

Assertion

Ref	Expression
prop	⊢ (𝐴 ∈ P → ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∈ P)

Proof of Theorem prop

Step	Hyp	Ref	Expression
1		npsspw 7691	. . . 4 ⊢ P ⊆ (𝒫 Q × 𝒫 Q)
2	1	sseli 3223	. . 3 ⊢ (𝐴 ∈ P → 𝐴 ∈ (𝒫 Q × 𝒫 Q))
3		1st2nd2 6338	. . 3 ⊢ (𝐴 ∈ (𝒫 Q × 𝒫 Q) → 𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩)
4	2, 3	syl 14	. 2 ⊢ (𝐴 ∈ P → 𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩)
5		eleq1 2294	. . 3 ⊢ (𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ → (𝐴 ∈ P ↔ ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∈ P))
6	5	biimpcd 159	. 2 ⊢ (𝐴 ∈ P → (𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ → ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∈ P))
7	4, 6	mpd 13	1 ⊢ (𝐴 ∈ P → ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∈ P)

Syntax hints:   → wi 4   = wceq 1397   ∈ wcel 2202  𝒫 cpw 3652  ⟨cop 3672   × cxp 4723  ‘cfv 5326  1^st c1st 6301  2^nd c2nd 6302  Qcnq 7500  Pcnp 7511

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-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-iota 5286  df-fun 5328  df-fv 5334  df-1st 6303  df-2nd 6304  df-inp 7686

This theorem is referenced by:  elnp1st2nd  7696  0npr  7703  genpdf  7728  genipv  7729  genpelvl  7732  genpelvu  7733  genpml  7737  genpmu  7738  genprndl  7741  genprndu  7742  genpdisj  7743  genpassl  7744  genpassu  7745  addnqprl  7749  addnqpru  7750  addlocprlemeqgt  7752  addlocprlemgt  7754  addlocprlem  7755  addlocpr  7756  nqprl  7771  nqpru  7772  addnqprlemfl  7779  addnqprlemfu  7780  mulnqprl  7788  mulnqpru  7789  mullocprlem  7790  mullocpr  7791  mulnqprlemfl  7795  mulnqprlemfu  7796  addcomprg  7798  mulcomprg  7800  distrlem1prl  7802  distrlem1pru  7803  distrlem4prl  7804  distrlem4pru  7805  ltprordil  7809  1idprl  7810  1idpru  7811  ltpopr  7815  ltsopr  7816  ltaddpr  7817  ltexprlemm  7820  ltexprlemopl  7821  ltexprlemlol  7822  ltexprlemopu  7823  ltexprlemupu  7824  ltexprlemdisj  7826  ltexprlemloc  7827  ltexprlemfl  7829  ltexprlemrl  7830  ltexprlemfu  7831  ltexprlemru  7832  addcanprleml  7834  addcanprlemu  7835  prplnqu  7840  recexprlemm  7844  recexprlemdisj  7850  recexprlemloc  7851  recexprlem1ssl  7853  recexprlem1ssu  7854  recexprlemss1l  7855  recexprlemss1u  7856  aptiprleml  7859  aptiprlemu  7860  archpr  7863  cauappcvgprlemladdru  7876  cauappcvgprlemladdrl  7877  archrecpr  7884  caucvgprlemladdrl  7898  caucvgprprlemml  7914  caucvgprprlemmu  7915  caucvgprprlemopl  7917  suplocexprlemml  7936  suplocexprlemrl  7937  suplocexprlemmu  7938  suplocexprlemdisj  7940  suplocexprlemloc  7941  suplocexprlemex  7942  suplocexprlemub  7943