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| Mirrors > Home > ILE Home > Th. List > elznn0nn | GIF version | ||
| Description: Integer property expressed in terms nonnegative integers and positive integers. (Contributed by NM, 10-May-2004.) |
| Ref | Expression |
|---|---|
| elznn0nn | ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℕ0 ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elz 9471 | . 2 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ))) | |
| 2 | andi 823 | . . 3 ⊢ ((𝑁 ∈ ℝ ∧ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ) ∨ -𝑁 ∈ ℕ)) ↔ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ)) ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ))) | |
| 3 | df-3or 1003 | . . . 4 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ) ∨ -𝑁 ∈ ℕ)) | |
| 4 | 3 | anbi2i 457 | . . 3 ⊢ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) ↔ (𝑁 ∈ ℝ ∧ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ) ∨ -𝑁 ∈ ℕ))) |
| 5 | nn0re 9401 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ) | |
| 6 | 5 | pm4.71ri 392 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℝ ∧ 𝑁 ∈ ℕ0)) |
| 7 | elnn0 9394 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
| 8 | orcom 733 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∨ 𝑁 = 0) ↔ (𝑁 = 0 ∨ 𝑁 ∈ ℕ)) | |
| 9 | 7, 8 | bitri 184 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 = 0 ∨ 𝑁 ∈ ℕ)) |
| 10 | 9 | anbi2i 457 | . . . . 5 ⊢ ((𝑁 ∈ ℝ ∧ 𝑁 ∈ ℕ0) ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ))) |
| 11 | 6, 10 | bitri 184 | . . . 4 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ))) |
| 12 | 11 | orbi1i 768 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) ↔ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ)) ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ))) |
| 13 | 2, 4, 12 | 3bitr4i 212 | . 2 ⊢ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) ↔ (𝑁 ∈ ℕ0 ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ))) |
| 14 | 1, 13 | bitri 184 | 1 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℕ0 ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ))) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 ∨ wo 713 ∨ w3o 1001 = wceq 1395 ∈ wcel 2200 ℝcr 8021 0cc0 8022 -cneg 8341 ℕcn 9133 ℕ0cn0 9392 ℤcz 9469 |
| 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 ax-sep 4205 ax-cnex 8113 ax-resscn 8114 ax-1cn 8115 ax-1re 8116 ax-icn 8117 ax-addcl 8118 ax-addrcl 8119 ax-mulcl 8120 ax-i2m1 8127 ax-rnegex 8131 |
| This theorem depends on definitions: df-bi 117 df-3or 1003 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-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-br 4087 df-iota 5284 df-fv 5332 df-ov 6016 df-neg 8343 df-inn 9134 df-n0 9393 df-z 9470 |
| This theorem is referenced by: peano2z 9505 zindd 9588 expcl2lemap 10803 mulexpzap 10831 expaddzap 10835 expmulzap 10837 absexpzap 11631 bitsfzo 12506 pcid 12887 mulgsubcl 13713 mulgneg 13717 ghmmulg 13833 |
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