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Mirrors > Home > ILE Home > Th. List > negeqi | GIF version |
Description: Equality inference for negatives. (Contributed by NM, 14-Feb-1995.) |
Ref | Expression |
---|---|
negeqi.1 | ⊢ 𝐴 = 𝐵 |
Ref | Expression |
---|---|
negeqi | ⊢ -𝐴 = -𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | negeqi.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | negeq 8180 | . 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ -𝐴 = -𝐵 |
Colors of variables: wff set class |
Syntax hints: = wceq 1364 -cneg 8159 |
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 2171 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-rex 2474 df-v 2754 df-un 3148 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-br 4019 df-iota 5196 df-fv 5243 df-ov 5899 df-neg 8161 |
This theorem is referenced by: negsubdii 8272 m1expcl2 10573 resqrexlemover 11051 resqrexlemcalc1 11055 absi 11100 geo2sum2 11555 cos2bnd 11800 lgseisenlem1 14908 lgseisenlem2 14909 |
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