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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 10568 ceilid 10577 modqcyc2 10622 monoord2 10748 reneg 11429 imneg 11437 cjcj 11444 cjneg 11451 minmax 11791 minabs 11797 telfsumo2 12029 sinneg 12288 tannegap 12290 sincossq 12310 odd2np1 12435 oexpneg 12439 modgcd 12563 pcneg 12899 mulgval 13710 mulgneg 13728 ivthdec 15370 limcimolemlt 15390 dvrecap 15439 sinperlem 15534 efimpi 15545 ptolemy 15550 lgsneg1 15756 lgseisenlem1 15801 lgseisenlem4 15804 m1lgs 15816 ex-ceil 16325 |
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