Theorem negeqi 8336

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 8335	. 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵)
3	1, 2	ax-mp 5	1 ⊢ -𝐴 = -𝐵

Syntax hints:   = wceq 1395  -cneg 8314

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-rex 2514  df-v 2801  df-un 3201  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-br 4083  df-iota 5277  df-fv 5325  df-ov 6003  df-neg 8316

This theorem is referenced by:  negsubdii  8427  m1expcl2  10778  resqrexlemover  11516  resqrexlemcalc1  11520  absi  11565  geo2sum2  12021  cos2bnd  12266  lgseisenlem1  15743  lgseisenlem2  15744  lgsquadlem1  15750