Theorem negeqi 8469

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

Hypothesis

Ref	Expression
negeqi.1	⊢ 𝐴 = 𝐵

Assertion

Ref	Expression
negeqi	⊢ -𝐴 = -𝐵

Proof of Theorem negeqi

Step	Hyp	Ref	Expression
1		negeqi.1	. 2 ⊢ 𝐴 = 𝐵
2		negeq 8468	. 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵)
3	1, 2	ax-mp 5	1 ⊢ -𝐴 = -𝐵

Syntax hints:   = wceq 1398  -cneg 8447

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-rex 2528  df-v 2817  df-un 3217  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-iota 5314  df-fv 5362  df-ov 6055  df-neg 8449

This theorem is referenced by:  negsubdii  8560  m1expcl2  10927  resqrexlemover  11699  resqrexlemcalc1  11703  absi  11748  geo2sum2  12205  cos2bnd  12450  ballotfilem2  13149  lgseisenlem1  15960  lgseisenlem2  15961  lgsquadlem1  15967