Theorem lttri4d 9715

Description: Trichotomy law for 'less than'. (Contributed by NM, 20-Sep-2007.) (Proof shortened by Andrew Salmon, 19-Nov-2011.)

Hypotheses

Ref	Expression
ltd.1	|- ( ph -> A e. RR )
ltd.2	|- ( ph -> B e. RR )

Assertion

Ref	Expression
lttri4d	|- ( ph -> ( A < B \/ A = B \/ B < A ) )

Proof of Theorem lttri4d

Step	Hyp	Ref	Expression
1		ltd.1	. 2 |- ( ph -> A e. RR )
2		ltd.2	. 2 |- ( ph -> B e. RR )
3		lttri4 9658	. 2 |- ( ( A e. RR /\ B e. RR ) -> ( A < B \/ A = B \/ B < A ) )
4	1, 2, 3	syl2anc 659	1 |- ( ph -> ( A < B \/ A = B \/ B < A ) )

Syntax hints:   -> wi 4   \/ w3o 970   = wceq 1398   e. wcel 1823   class class class wbr 4439   RRcr 9480   < clt 9617

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565  ax-resscn 9538  ax-pre-lttri 9555  ax-pre-lttrn 9556

This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-nel 2652  df-ral 2809  df-rex 2810  df-rab 2813  df-v 3108  df-sbc 3325  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-op 4023  df-uni 4236  df-br 4440  df-opab 4498  df-mpt 4499  df-id 4784  df-po 4789  df-so 4790  df-xp 4994  df-rel 4995  df-cnv 4996  df-co 4997  df-dm 4998  df-rn 4999  df-res 5000  df-ima 5001  df-iota 5534  df-fun 5572  df-fn 5573  df-f 5574  df-f1 5575  df-fo 5576  df-f1o 5577  df-fv 5578  df-er 7303  df-en 7510  df-dom 7511  df-sdom 7512  df-pnf 9619  df-mnf 9620  df-ltxr 9622

This theorem is referenced by:  icccvx  21616  ivthicc  22036  dvivth  22577  coseq00topi  23061  cvxcl  23512  scvxcvx  23513