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| Mirrors > Home > ILE Home > Th. List > resubcli | GIF version | ||
| Description: Closure law for subtraction of reals. (Contributed by NM, 17-Jan-1997.) (Revised by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| renegcl.1 | ⊢ 𝐴 ∈ ℝ |
| resubcl.2 | ⊢ 𝐵 ∈ ℝ |
| Ref | Expression |
|---|---|
| resubcli | ⊢ (𝐴 − 𝐵) ∈ ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | renegcl.1 | . . . 4 ⊢ 𝐴 ∈ ℝ | |
| 2 | 1 | recni 8174 | . . 3 ⊢ 𝐴 ∈ ℂ |
| 3 | resubcl.2 | . . . 4 ⊢ 𝐵 ∈ ℝ | |
| 4 | 3 | recni 8174 | . . 3 ⊢ 𝐵 ∈ ℂ |
| 5 | negsub 8410 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + -𝐵) = (𝐴 − 𝐵)) | |
| 6 | 2, 4, 5 | mp2an 426 | . 2 ⊢ (𝐴 + -𝐵) = (𝐴 − 𝐵) |
| 7 | 3 | renegcli 8424 | . . 3 ⊢ -𝐵 ∈ ℝ |
| 8 | 1, 7 | readdcli 8175 | . 2 ⊢ (𝐴 + -𝐵) ∈ ℝ |
| 9 | 6, 8 | eqeltrri 2303 | 1 ⊢ (𝐴 − 𝐵) ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 ∈ wcel 2200 (class class class)co 6010 ℂcc 8013 ℝcr 8014 + caddc 8018 − cmin 8333 -cneg 8334 |
| 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-in1 617 ax-in2 618 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-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-setind 4630 ax-resscn 8107 ax-1cn 8108 ax-icn 8110 ax-addcl 8111 ax-addrcl 8112 ax-mulcl 8113 ax-addcom 8115 ax-addass 8117 ax-distr 8119 ax-i2m1 8120 ax-0id 8123 ax-rnegex 8124 ax-cnre 8126 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-id 4385 df-xp 4726 df-rel 4727 df-cnv 4728 df-co 4729 df-dm 4730 df-iota 5281 df-fun 5323 df-fv 5329 df-riota 5963 df-ov 6013 df-oprab 6014 df-mpo 6015 df-sub 8335 df-neg 8336 |
| This theorem is referenced by: 0reALT 8459 |
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