Theorem negeqi 8301

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 8300	. 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵)
3	1, 2	ax-mp 5	1 ⊢ -𝐴 = -𝐵

Syntax hints:   = wceq 1373  -cneg 8279

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-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-rex 2492  df-v 2778  df-un 3178  df-sn 3649  df-pr 3650  df-op 3652  df-uni 3865  df-br 4060  df-iota 5251  df-fv 5298  df-ov 5970  df-neg 8281

This theorem is referenced by:  negsubdii  8392  m1expcl2  10743  resqrexlemover  11436  resqrexlemcalc1  11440  absi  11485  geo2sum2  11941  cos2bnd  12186  lgseisenlem1  15662  lgseisenlem2  15663  lgsquadlem1  15669