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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 8526 | . 2 ⊢ (𝐴 = 𝐵 → -𝐴 = -𝐵) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → -𝐴 = -𝐵) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 -cneg 8505 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 df-un 3224 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-iota 5340 df-fv 5388 df-ov 6091 df-neg 8507 |
| This theorem is used by: negdi 8590 mulneg2 8730 mulm1 8734 eqord2 8819 mulreim 8940 apneg 8947 divnegap 9044 div2negap 9073 recgt0 9188 infrenegsupex 10010 supminfex 10013 mul2lt0rlt0 10177 ceilqval 10764 ceilid 10773 modqcyc2 10818 monoord2 10944 reneg 11655 imneg 11663 cjcj 11670 cjneg 11677 minmax 12020 minabs 12026 telfsumo2 12259 sinneg 12518 tannegap 12520 sincossq 12540 odd2np1 12665 oexpneg 12669 modgcd 12793 pcneg 13133 mulgval 13984 mulgneg 14002 ivthdec 15870 limcimolemlt 15890 dvrecap 15939 sinperlem 16035 efimpi 16046 ptolemy 16051 rpcxpmul2z 16148 birthdaylem3 16227 lgsneg1 16349 lgseisenlem1 16394 lgseisenlem4 16397 m1lgs 16409 ex-ceil 16945 |
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