Theorem ltrel 8246

Description: 'Less than' is a relation. (Contributed by NM, 14-Oct-2005.)

Assertion

Ref	Expression
ltrel	⊢ Rel <

Proof of Theorem ltrel

Step	Hyp	Ref	Expression
1		ltrelxr 8245	. 2 ⊢ < ⊆ (ℝ* × ℝ*)
2		relxp 4837	. 2 ⊢ Rel (ℝ* × ℝ*)
3		relss 4815	. 2 ⊢ ( < ⊆ (ℝ* × ℝ*) → (Rel (ℝ* × ℝ*) → Rel < ))
4	1, 2, 3	mp2 16	1 ⊢ Rel <

Syntax hints:   ⊆ wss 3199   × cxp 4725  Rel wrel 4732  ℝ^*cxr 8218   < clt 8219

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-ext 2212

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1810  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-v 2803  df-un 3203  df-in 3205  df-ss 3212  df-pr 3677  df-opab 4152  df-xp 4733  df-rel 4734  df-xr 8223  df-ltxr 8224

This theorem is referenced by: (None)