Theorem coeq2i 4856

Description: Equality inference for composition of two classes. (Contributed by NM, 16-Nov-2000.)

Hypothesis

Ref	Expression
coeq1i.1	|- A = B

Assertion

Ref	Expression
coeq2i	|- ( C o. A ) = ( C o. B )

Proof of Theorem coeq2i

Step	Hyp	Ref	Expression
1		coeq1i.1	. 2 |- A = B
2		coeq2 4854	. 2 |- ( A = B -> ( C o. A ) = ( C o. B ) )
3	1, 2	ax-mp 5	1 |- ( C o. A ) = ( C o. B )

Syntax hints:   = wceq 1373   o. ccom 4697

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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-ext 2189

This theorem depends on definitions:  df-bi 117  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-in 3180  df-ss 3187  df-br 4060  df-opab 4122  df-co 4702

This theorem is referenced by:  coeq12i  4859  cocnvcnv2  5213  co01  5216  cocnvres  5226  fcoi1  5478  dftpos2  6370  tposco  6384