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Mirrors > Home > ILE Home > Th. List > negeqd | GIF version |
Description: Equality deduction for negatives. (Contributed by NM, 14-May-1999.) |
Ref | Expression |
---|---|
negeqd.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
Ref | Expression |
---|---|
negeqd | ⊢ (𝜑 → -𝐴 = -𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | negeqd.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
2 | negeq 7955 | . 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵) | |
3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → -𝐴 = -𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1331 -cneg 7934 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-rex 2422 df-v 2688 df-un 3075 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-iota 5088 df-fv 5131 df-ov 5777 df-neg 7936 |
This theorem is referenced by: negdi 8019 mulneg2 8158 mulm1 8162 eqord2 8246 mulreim 8366 apneg 8373 divnegap 8466 div2negap 8495 recgt0 8608 infrenegsupex 9389 supminfex 9392 mul2lt0rlt0 9546 ceilqval 10079 ceilid 10088 modqcyc2 10133 monoord2 10250 reneg 10640 imneg 10648 cjcj 10655 cjneg 10662 minmax 11001 minabs 11007 telfsumo2 11236 sinneg 11433 tannegap 11435 sincossq 11455 odd2np1 11570 oexpneg 11574 modgcd 11679 ivthdec 12791 limcimolemlt 12802 dvrecap 12846 sinperlem 12889 efimpi 12900 ptolemy 12905 ex-ceil 12938 |
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