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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 8362 | . 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 8341 |
| 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 2802 df-un 3202 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-iota 5284 df-fv 5332 df-ov 6016 df-neg 8343 |
| This theorem is referenced by: negdi 8426 mulneg2 8565 mulm1 8569 eqord2 8654 mulreim 8774 apneg 8781 divnegap 8876 div2negap 8905 recgt0 9020 infrenegsupex 9818 supminfex 9821 mul2lt0rlt0 9984 ceilqval 10558 ceilid 10567 modqcyc2 10612 monoord2 10738 reneg 11419 imneg 11427 cjcj 11434 cjneg 11441 minmax 11781 minabs 11787 telfsumo2 12018 sinneg 12277 tannegap 12279 sincossq 12299 odd2np1 12424 oexpneg 12428 modgcd 12552 pcneg 12888 mulgval 13699 mulgneg 13717 ivthdec 15358 limcimolemlt 15378 dvrecap 15427 sinperlem 15522 efimpi 15533 ptolemy 15538 lgsneg1 15744 lgseisenlem1 15789 lgseisenlem4 15792 m1lgs 15804 ex-ceil 16258 |
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