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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 6885 | . . . 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 5112 | . 2 ⊢ (𝑀 = if(𝑀 ∈ ℤ, 𝑀, 0) → (𝑍 ≈ ω ↔ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ≈ ω)) |
| 5 | omex 9645 | . . . 4 ⊢ ω ∈ V | |
| 6 | fvex 6898 | . . . 4 ⊢ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ∈ V | |
| 7 | 0z 12705 | . . . . . 6 ⊢ 0 ∈ ℤ | |
| 8 | 7 | elimel 4551 | . . . . 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 14097 | . . . 4 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), if(𝑀 ∈ ℤ, 𝑀, 0)) ↾ ω):ω–1-1-onto→(ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) |
| 11 | f1oen2g 8996 | . . . 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 9032 | . 2 ⊢ (ℤ≥‘if(𝑀 ∈ ℤ, 𝑀, 0)) ≈ ω |
| 14 | 4, 13 | dedth 4540 | 1 ⊢ (𝑀 ∈ ℤ → 𝑍 ≈ ω) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 Vcvv 3450 ifcif 4481 class class class wbr 5102 ↦ cmpt 5185 ↾ cres 5652 –1-1-onto→wf1o 6537 ‘cfv 6538 (class class class)co 7420 ωcom 7877 reccrdg 8418 ≈ cen 8971 0cc0 11201 1c1 11202 + caddc 11204 ℤcz 12694 ℤ≥cuz 12966 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-inf2 9643 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-er 8718 df-en 8975 df-dom 8976 df-sdom 8977 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-nn 12337 df-n0 12608 df-z 12695 df-uz 12967 |
| This theorem is used by: uzinf 14109 iscmet3 25615 |
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