Theorem opeq12i 3809

Description: Equality inference for ordered pairs. (Contributed by NM, 16-Dec-2006.) (Proof shortened by Eric Schmidt, 4-Apr-2007.)

Hypotheses

Ref	Expression
opeq1i.1	|- A = B
opeq12i.2	|- C = D

Assertion

Ref	Expression
opeq12i	|- <. A , C >. = <. B , D >.

Proof of Theorem opeq12i

Step	Hyp	Ref	Expression
1		opeq1i.1	. 2 |- A = B
2		opeq12i.2	. 2 |- C = D
3		opeq12 3806	. 2 |- ( ( A = B /\ C = D ) -> <. A , C >. = <. B , D >. )
4	1, 2, 3	mp2an 426	1 |- <. A , C >. = <. B , D >.

Syntax hints:   = wceq 1364   <.cop 3621

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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-v 2762  df-un 3157  df-sn 3624  df-pr 3625  df-op 3627

This theorem is referenced by:  addpinq1  7524  genipv  7569  ltexpri  7673  recexpr  7698  cauappcvgprlemladdru  7716  cauappcvgprlemladdrl  7717  cauappcvgpr  7722  caucvgprlemcl  7736  caucvgprlemladdrl  7738  caucvgpr  7742  caucvgprprlemval  7748  caucvgprprlemnbj  7753  caucvgprprlemmu  7755  caucvgprprlemclphr  7765  caucvgprprlemaddq  7768  caucvgprprlem1  7769  caucvgprprlem2  7770  caucvgsr  7862  pitonnlem1  7905  axi2m1  7935  axcaucvg  7960