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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 8085 | . 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ -𝐴 = -𝐵 |
Colors of variables: wff set class |
Syntax hints: = wceq 1342 -cneg 8064 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-rex 2448 df-v 2726 df-un 3118 df-sn 3579 df-pr 3580 df-op 3582 df-uni 3787 df-br 3980 df-iota 5150 df-fv 5193 df-ov 5842 df-neg 8066 |
This theorem is referenced by: negsubdii 8177 m1expcl2 10471 resqrexlemover 10946 resqrexlemcalc1 10950 absi 10995 geo2sum2 11450 cos2bnd 11695 |
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