Theorem nfoprab1 5872

Description: The abstraction variables in an operation class abstraction are not free. (Contributed by NM, 25-Apr-1995.) (Revised by David Abernethy, 19-Jun-2012.)

Assertion

Ref	Expression
nfoprab1	|- F/_ x { <. <. x , y >. , z >. | ph }

Proof of Theorem nfoprab1

Dummy variable w is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-oprab 5830	. 2 |- { <. <. x , y >. , z >. | ph } = { w | E. x E. y E. z ( w = <. <. x , y >. , z >. /\ ph ) }
2		nfe1 1476	. . 3 |- F/ x E. x E. y E. z ( w = <. <. x , y >. , z >. /\ ph )
3	2	nfab 2304	. 2 |- F/_ x { w | E. x E. y E. z ( w = <. <. x , y >. , z >. /\ ph ) }
4	1, 3	nfcxfr 2296	1 |- F/_ x { <. <. x , y >. , z >. | ph }

Syntax hints:   /\ wa 103   = wceq 1335   E.wex 1472   {cab 2143   F/_wnfc 2286   <.cop 3564   {coprab 5827

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1427  ax-7 1428  ax-gen 1429  ax-ie1 1473  ax-ie2 1474  ax-8 1484  ax-10 1485  ax-11 1486  ax-i12 1487  ax-bndl 1489  ax-4 1490  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2139

This theorem depends on definitions:  df-bi 116  df-nf 1441  df-sb 1743  df-clab 2144  df-cleq 2150  df-clel 2153  df-nfc 2288  df-oprab 5830

This theorem is referenced by:  ssoprab2b  5880  nfmpo1  5890  ovi3  5959  tposoprab  6229