Theorem negeqi 8213

Description: Equality inference for negatives. (Contributed by NM, 14-Feb-1995.)

Hypothesis

Ref	Expression
negeqi.1	|- A = B

Assertion

Ref	Expression
negeqi	|- -u A = -u B

Proof of Theorem negeqi

Step	Hyp	Ref	Expression
1		negeqi.1	. 2 |- A = B
2		negeq 8212	. 2 |- ( A = B -> -u A = -u B )
3	1, 2	ax-mp 5	1 |- -u A = -u B

Syntax hints:   = wceq 1364   -ucneg 8191

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-rex 2478  df-v 2762  df-un 3157  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-iota 5215  df-fv 5262  df-ov 5921  df-neg 8193

This theorem is referenced by:  negsubdii  8304  m1expcl2  10632  resqrexlemover  11154  resqrexlemcalc1  11158  absi  11203  geo2sum2  11658  cos2bnd  11903  lgseisenlem1  15186  lgseisenlem2  15187  lgsquadlem1  15191