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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 8371 | . 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 1397 -cneg 8350 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6020 df-neg 8352 |
| This theorem is referenced by: negdi 8435 mulneg2 8574 mulm1 8578 eqord2 8663 mulreim 8783 apneg 8790 divnegap 8885 div2negap 8914 recgt0 9029 infrenegsupex 9827 supminfex 9830 mul2lt0rlt0 9993 ceilqval 10567 ceilid 10576 modqcyc2 10621 monoord2 10747 reneg 11428 imneg 11436 cjcj 11443 cjneg 11450 minmax 11790 minabs 11796 telfsumo2 12027 sinneg 12286 tannegap 12288 sincossq 12308 odd2np1 12433 oexpneg 12437 modgcd 12561 pcneg 12897 mulgval 13708 mulgneg 13726 ivthdec 15367 limcimolemlt 15387 dvrecap 15436 sinperlem 15531 efimpi 15542 ptolemy 15547 lgsneg1 15753 lgseisenlem1 15798 lgseisenlem4 15801 m1lgs 15813 ex-ceil 16322 |
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