Theorem ltrelpr 7703

Description: Positive real 'less than' is a relation on positive reals. (Contributed by NM, 14-Feb-1996.)

Assertion

Ref	Expression
ltrelpr	⊢ <P ⊆ (P × P)

Proof of Theorem ltrelpr

Dummy variables 𝑥 𝑞 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-iltp 7668	. 2 ⊢ <P = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ ∃𝑞 ∈ Q (𝑞 ∈ (2nd ‘𝑥) ∧ 𝑞 ∈ (1st ‘𝑦)))}
2		opabssxp 4793	. 2 ⊢ {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ P ∧ 𝑦 ∈ P) ∧ ∃𝑞 ∈ Q (𝑞 ∈ (2nd ‘𝑥) ∧ 𝑞 ∈ (1st ‘𝑦)))} ⊆ (P × P)
3	1, 2	eqsstri 3256	1 ⊢ <P ⊆ (P × P)

Syntax hints:   ∧ wa 104   ∈ wcel 2200  ∃wrex 2509   ⊆ wss 3197  {copab 4144   × cxp 4717  ‘cfv 5318  1^st c1st 6290  2^nd c2nd 6291  Qcnq 7478  Pcnp 7489  <_P cltp 7493

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 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-ext 2211

This theorem depends on definitions:  df-bi 117  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-in 3203  df-ss 3210  df-opab 4146  df-xp 4725  df-iltp 7668

This theorem is referenced by:  ltprordil  7787  ltexprlemm  7798  ltexprlemopl  7799  ltexprlemlol  7800  ltexprlemopu  7801  ltexprlemupu  7802  ltexprlemdisj  7804  ltexprlemloc  7805  ltexprlemfl  7807  ltexprlemrl  7808  ltexprlemfu  7809  ltexprlemru  7810  ltexpri  7811  lteupri  7815  ltaprlem  7816  prplnqu  7818  caucvgprprlemk  7881  caucvgprprlemnkltj  7887  caucvgprprlemnkeqj  7888  caucvgprprlemnjltk  7889  caucvgprprlemnbj  7891  caucvgprprlemml  7892  caucvgprprlemlol  7896  caucvgprprlemupu  7898  suplocexprlemss  7913  suplocexprlemlub  7922  gt0srpr  7946  lttrsr  7960  ltposr  7961  archsr  7980