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Mirrors > Home > ILE Home > Th. List > uzf | GIF version |
Description: The domain and range of the upper integers function. (Contributed by Scott Fenton, 8-Aug-2013.) (Revised by Mario Carneiro, 3-Nov-2013.) |
Ref | Expression |
---|---|
uzf | ⊢ ℤ≥:ℤ⟶𝒫 ℤ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssrab2 3227 | . . . 4 ⊢ {𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘} ⊆ ℤ | |
2 | zex 9200 | . . . . 5 ⊢ ℤ ∈ V | |
3 | 2 | elpw2 4136 | . . . 4 ⊢ ({𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘} ∈ 𝒫 ℤ ↔ {𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘} ⊆ ℤ) |
4 | 1, 3 | mpbir 145 | . . 3 ⊢ {𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘} ∈ 𝒫 ℤ |
5 | 4 | rgenw 2521 | . 2 ⊢ ∀𝑗 ∈ ℤ {𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘} ∈ 𝒫 ℤ |
6 | df-uz 9467 | . . 3 ⊢ ℤ≥ = (𝑗 ∈ ℤ ↦ {𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘}) | |
7 | 6 | fmpt 5635 | . 2 ⊢ (∀𝑗 ∈ ℤ {𝑘 ∈ ℤ ∣ 𝑗 ≤ 𝑘} ∈ 𝒫 ℤ ↔ ℤ≥:ℤ⟶𝒫 ℤ) |
8 | 5, 7 | mpbi 144 | 1 ⊢ ℤ≥:ℤ⟶𝒫 ℤ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2136 ∀wral 2444 {crab 2448 ⊆ wss 3116 𝒫 cpw 3559 class class class wbr 3982 ⟶wf 5184 ≤ cle 7934 ℤcz 9191 ℤ≥cuz 9466 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-cnex 7844 ax-resscn 7845 |
This theorem depends on definitions: df-bi 116 df-3or 969 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-rab 2453 df-v 2728 df-sbc 2952 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-br 3983 df-opab 4044 df-mpt 4045 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-fv 5196 df-ov 5845 df-neg 8072 df-z 9192 df-uz 9467 |
This theorem is referenced by: eluzel2 9471 uzn0 9481 uzin2 10929 rexanuz 10930 climmpt 11241 lmbr2 12854 lmff 12889 |
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