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| Mirrors > Home > MPE Home > Th. List > uzenom | Structured version Visualization version GIF version | ||
| Description: An upper integer set is denumerable. (Contributed by Mario Carneiro, 15-Oct-2015.) |
| Ref | Expression |
|---|---|
| uzinf.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
| Ref | Expression |
|---|---|
| uzenom | ⊢ (𝑀 ∈ ℤ → 𝑍 ≈ ω) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uzinf.1 | . . . 4 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
| 2 | fveq2 6874 | . . . 4 ⊢ (𝑀 = if(𝑀 ∈ ℤ, 𝑀, 0) → (ℤ≥‘𝑀) = (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0))) | |
| 3 | 1, 2 | eqtrid 2807 | . . 3 ⊢ (𝑀 = if(𝑀 ∈ ℤ, 𝑀, 0) → 𝑍 = (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0))) |
| 4 | 3 | breq1d 5113 | . 2 ⊢ (𝑀 = if(𝑀 ∈ ℤ, 𝑀, 0) → (𝑍 ≈ ω ↔ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ≈ ω)) |
| 5 | omex 9622 | . . . 4 ⊢ ω ∈ V | |
| 6 | fvex 6887 | . . . 4 ⊢ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ∈ V | |
| 7 | 0z 12659 | . . . . . 6 ⊢ 0 ∈ ℤ | |
| 8 | 7 | elimel 4552 | . . . . 5 ⊢ if(𝑀 ∈ ℤ, 𝑀, 0) ∈ ℤ |
| 9 | eqid 2760 | . . . . 5 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), if(𝑀 ∈ ℤ, 𝑀, 0)) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), if(𝑀 ∈ ℤ, 𝑀, 0)) ↾ ω) | |
| 10 | 8, 9 | om2uzf1oi 14050 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), if(𝑀 ∈ ℤ, 𝑀, 0)) ↾ ω):ω–1-1-onto→(ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) |
| 11 | f1oen2g 8974 | . . . 4 ⊢ ((ω ∈ V ∧ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ∈ V ∧ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), if(𝑀 ∈ ℤ, 𝑀, 0)) ↾ ω):ω–1-1-onto→(ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0))) → ω ≈ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0))) | |
| 12 | 5, 6, 10, 11 | mp3an 1490 | . . 3 ⊢ ω ≈ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) |
| 13 | 12 | ensymi 9010 | . 2 ⊢ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ≈ ω |
| 14 | 4, 13 | dedth 4541 | 1 ⊢ (𝑀 ∈ ℤ → 𝑍 ≈ ω) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 Vcvv 3450 ifcif 4482 class class class wbr 5103 ↦ cmpt 5186 ↾ cres 5650 –1-1-onto→wf1o 6527 ‘cfv 6528 (class class class)co 7409 ωcom 7861 reccrdg 8396 ≈ cen 8949 0cc0 11157 1c1 11158 + caddc 11160 ℤcz 12648 ℤ≥cuz 12920 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7735 ax-inf2 9620 ax-cnex 11213 ax-resscn 11214 ax-1cn 11215 ax-icn 11216 ax-addcl 11217 ax-addrcl 11218 ax-mulcl 11219 ax-mulrcl 11220 ax-mulcom 11221 ax-addass 11222 ax-mulass 11223 ax-distr 11224 ax-i2m1 11225 ax-1ne0 11226 ax-1rid 11227 ax-rnegex 11228 ax-rrecex 11229 ax-cnre 11230 ax-pre-lttri 11231 ax-pre-lttrn 11232 ax-pre-ltadd 11233 ax-pre-mulgt0 11234 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6294 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6530 df-fn 6531 df-f 6532 df-f1 6533 df-fo 6534 df-f1o 6535 df-fv 6536 df-riota 7366 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7862 df-2nd 7986 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11302 df-mnf 11303 df-xr 11304 df-ltxr 11305 df-le 11306 df-sub 11500 df-neg 11501 df-nn 12291 df-n0 12562 df-z 12649 df-uz 12921 |
| This theorem is used by: uzinf 14062 iscmet3 25561 |
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