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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 8350 | . 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 1395 -cneg 8329 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rex 2514 df-v 2801 df-un 3201 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-iota 5278 df-fv 5326 df-ov 6010 df-neg 8331 |
| This theorem is referenced by: negdi 8414 mulneg2 8553 mulm1 8557 eqord2 8642 mulreim 8762 apneg 8769 divnegap 8864 div2negap 8893 recgt0 9008 infrenegsupex 9801 supminfex 9804 mul2lt0rlt0 9967 ceilqval 10540 ceilid 10549 modqcyc2 10594 monoord2 10720 reneg 11394 imneg 11402 cjcj 11409 cjneg 11416 minmax 11756 minabs 11762 telfsumo2 11993 sinneg 12252 tannegap 12254 sincossq 12274 odd2np1 12399 oexpneg 12403 modgcd 12527 pcneg 12863 mulgval 13674 mulgneg 13692 ivthdec 15333 limcimolemlt 15353 dvrecap 15402 sinperlem 15497 efimpi 15508 ptolemy 15513 lgsneg1 15719 lgseisenlem1 15764 lgseisenlem4 15767 m1lgs 15779 ex-ceil 16145 |
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