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| Mirrors > Home > MPE Home > Th. List > csbnegg | Structured version Visualization version GIF version | ||
| Description: Move class substitution in and out of the negative of a number. (Contributed by NM, 1-Mar-2008.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
| Ref | Expression |
|---|---|
| csbnegg | ⊢ (𝐴 ∈ 𝑉 → ⦋𝐴 / 𝑥⦌ -𝐵 = -⦋𝐴 / 𝑥⦌𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | csbov2g 7469 | . 2 ⊢ (𝐴 ∈ 𝑉 → ⦋𝐴 / 𝑥⦌(0 − 𝐵) = (0 − ⦋𝐴 / 𝑥⦌𝐵)) | |
| 2 | df-neg 11548 | . . 3 ⊢ -𝐵 = (0 − 𝐵) | |
| 3 | 2 | csbeq2i 3854 | . 2 ⊢ ⦋𝐴 / 𝑥⦌ -𝐵 = ⦋𝐴 / 𝑥⦌(0 − 𝐵) |
| 4 | df-neg 11548 | . 2 ⊢ -⦋𝐴 / 𝑥⦌𝐵 = (0 − ⦋𝐴 / 𝑥⦌𝐵) | |
| 5 | 1, 3, 4 | 3eqtr4g 2820 | 1 ⊢ (𝐴 ∈ 𝑉 → ⦋𝐴 / 𝑥⦌ -𝐵 = -⦋𝐴 / 𝑥⦌𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ⦋csb 3846 (class class class)co 7421 0cc0 11204 − cmin 11545 -cneg 11546 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-dm 5660 df-iota 6494 df-fv 6547 df-ov 7424 df-neg 11548 |
| This theorem is used by: dvfsum2 26360 renegclALT 40114 |
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