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| Mirrors > Home > ILE Home > Th. List > elznn | GIF version | ||
| Description: Integer property expressed in terms of positive integers and nonnegative integers. (Contributed by NM, 12-Jul-2005.) |
| Ref | Expression |
|---|---|
| elznn | ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ0))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elz 9480 | . 2 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ))) | |
| 2 | 3orrot 1010 | . . . . 5 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
| 3 | 3orass 1007 | . . . . 5 ⊢ ((𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ ∨ 𝑁 = 0) ↔ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) | |
| 4 | 2, 3 | bitri 184 | . . . 4 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) |
| 5 | elnn0 9403 | . . . . . 6 ⊢ (-𝑁 ∈ ℕ0 ↔ (-𝑁 ∈ ℕ ∨ -𝑁 = 0)) | |
| 6 | recn 8164 | . . . . . . . 8 ⊢ (𝑁 ∈ ℝ → 𝑁 ∈ ℂ) | |
| 7 | 6 | negeq0d 8481 | . . . . . . 7 ⊢ (𝑁 ∈ ℝ → (𝑁 = 0 ↔ -𝑁 = 0)) |
| 8 | 7 | orbi2d 797 | . . . . . 6 ⊢ (𝑁 ∈ ℝ → ((-𝑁 ∈ ℕ ∨ 𝑁 = 0) ↔ (-𝑁 ∈ ℕ ∨ -𝑁 = 0))) |
| 9 | 5, 8 | bitr4id 199 | . . . . 5 ⊢ (𝑁 ∈ ℝ → (-𝑁 ∈ ℕ0 ↔ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) |
| 10 | 9 | orbi2d 797 | . . . 4 ⊢ (𝑁 ∈ ℝ → ((𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ0) ↔ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)))) |
| 11 | 4, 10 | bitr4id 199 | . . 3 ⊢ (𝑁 ∈ ℝ → ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ0))) |
| 12 | 11 | pm5.32i 454 | . 2 ⊢ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ0))) |
| 13 | 1, 12 | bitri 184 | 1 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ0))) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 ∨ wo 715 ∨ w3o 1003 = wceq 1397 ∈ wcel 2202 ℝcr 8030 0cc0 8031 -cneg 8350 ℕcn 9142 ℕ0cn0 9401 ℤcz 9478 |
| 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 619 ax-in2 620 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-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-setind 4635 ax-resscn 8123 ax-1cn 8124 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-addcom 8131 ax-addass 8133 ax-distr 8135 ax-i2m1 8136 ax-0id 8139 ax-rnegex 8140 ax-cnre 8142 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-riota 5970 df-ov 6020 df-oprab 6021 df-mpo 6022 df-sub 8351 df-neg 8352 df-n0 9402 df-z 9479 |
| This theorem is referenced by: zzlesq 10969 znnen 13018 logbgcd1irraplemexp 15691 |
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