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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 8520 | . 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 8499 |
| 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 4131 df-iota 5337 df-fv 5385 df-ov 6088 df-neg 8501 |
| This theorem is used by: negdi 8584 mulneg2 8724 mulm1 8728 eqord2 8813 mulreim 8934 apneg 8941 divnegap 9038 div2negap 9067 recgt0 9182 infrenegsupex 10003 supminfex 10006 mul2lt0rlt0 10170 ceilqval 10756 ceilid 10765 modqcyc2 10810 monoord2 10936 reneg 11647 imneg 11655 cjcj 11662 cjneg 11669 minmax 12011 minabs 12017 telfsumo2 12250 sinneg 12509 tannegap 12511 sincossq 12531 odd2np1 12656 oexpneg 12660 modgcd 12784 pcneg 13124 mulgval 13974 mulgneg 13992 ivthdec 15794 limcimolemlt 15814 dvrecap 15863 sinperlem 15959 efimpi 15970 ptolemy 15975 birthdaylem3 16146 lgsneg1 16242 lgseisenlem1 16287 lgseisenlem4 16290 m1lgs 16302 ex-ceil 16838 |
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