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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 8372 | . 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 8351 |
| 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 6021 df-neg 8353 |
| This theorem is referenced by: negdi 8436 mulneg2 8575 mulm1 8579 eqord2 8664 mulreim 8784 apneg 8791 divnegap 8886 div2negap 8915 recgt0 9030 infrenegsupex 9828 supminfex 9831 mul2lt0rlt0 9994 ceilqval 10569 ceilid 10578 modqcyc2 10623 monoord2 10749 reneg 11433 imneg 11441 cjcj 11448 cjneg 11455 minmax 11795 minabs 11801 telfsumo2 12033 sinneg 12292 tannegap 12294 sincossq 12314 odd2np1 12439 oexpneg 12443 modgcd 12567 pcneg 12903 mulgval 13714 mulgneg 13732 ivthdec 15374 limcimolemlt 15394 dvrecap 15443 sinperlem 15538 efimpi 15549 ptolemy 15554 lgsneg1 15760 lgseisenlem1 15805 lgseisenlem4 15808 m1lgs 15820 ex-ceil 16344 |
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