![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > dfuzi | GIF version |
Description: An expression for the upper integers that start at 𝑁 that is analogous to dfnn2 8986 for positive integers. (Contributed by NM, 6-Jul-2005.) (Proof shortened by Mario Carneiro, 3-May-2014.) |
Ref | Expression |
---|---|
dfuz.1 | ⊢ 𝑁 ∈ ℤ |
Ref | Expression |
---|---|
dfuzi | ⊢ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} = ∩ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssintab 3888 | . . 3 ⊢ ({𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ⊆ ∩ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} ↔ ∀𝑥((𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥) → {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ⊆ 𝑥)) | |
2 | dfuz.1 | . . . 4 ⊢ 𝑁 ∈ ℤ | |
3 | 2 | peano5uzi 9429 | . . 3 ⊢ ((𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥) → {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ⊆ 𝑥) |
4 | 1, 3 | mpgbir 1464 | . 2 ⊢ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ⊆ ∩ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} |
5 | 2 | zrei 9326 | . . . . . 6 ⊢ 𝑁 ∈ ℝ |
6 | 5 | leidi 8506 | . . . . 5 ⊢ 𝑁 ≤ 𝑁 |
7 | breq2 4034 | . . . . . 6 ⊢ (𝑧 = 𝑁 → (𝑁 ≤ 𝑧 ↔ 𝑁 ≤ 𝑁)) | |
8 | 7 | elrab 2917 | . . . . 5 ⊢ (𝑁 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ↔ (𝑁 ∈ ℤ ∧ 𝑁 ≤ 𝑁)) |
9 | 2, 6, 8 | mpbir2an 944 | . . . 4 ⊢ 𝑁 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} |
10 | peano2uz2 9427 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝑦 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧}) → (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧}) | |
11 | 2, 10 | mpan 424 | . . . . 5 ⊢ (𝑦 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} → (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧}) |
12 | 11 | rgen 2547 | . . . 4 ⊢ ∀𝑦 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} |
13 | zex 9329 | . . . . . 6 ⊢ ℤ ∈ V | |
14 | 13 | rabex 4174 | . . . . 5 ⊢ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ∈ V |
15 | eleq2 2257 | . . . . . 6 ⊢ (𝑥 = {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} → (𝑁 ∈ 𝑥 ↔ 𝑁 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧})) | |
16 | eleq2 2257 | . . . . . . 7 ⊢ (𝑥 = {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} → ((𝑦 + 1) ∈ 𝑥 ↔ (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧})) | |
17 | 16 | raleqbi1dv 2702 | . . . . . 6 ⊢ (𝑥 = {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} → (∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥 ↔ ∀𝑦 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧})) |
18 | 15, 17 | anbi12d 473 | . . . . 5 ⊢ (𝑥 = {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} → ((𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥) ↔ (𝑁 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ∧ ∀𝑦 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧}))) |
19 | 14, 18 | elab 2905 | . . . 4 ⊢ ({𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ∈ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} ↔ (𝑁 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ∧ ∀𝑦 ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} (𝑦 + 1) ∈ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧})) |
20 | 9, 12, 19 | mpbir2an 944 | . . 3 ⊢ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ∈ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} |
21 | intss1 3886 | . . 3 ⊢ ({𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} ∈ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} → ∩ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} ⊆ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧}) | |
22 | 20, 21 | ax-mp 5 | . 2 ⊢ ∩ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} ⊆ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} |
23 | 4, 22 | eqssi 3196 | 1 ⊢ {𝑧 ∈ ℤ ∣ 𝑁 ≤ 𝑧} = ∩ {𝑥 ∣ (𝑁 ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 (𝑦 + 1) ∈ 𝑥)} |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∈ wcel 2164 {cab 2179 ∀wral 2472 {crab 2476 ⊆ wss 3154 ∩ cint 3871 class class class wbr 4030 (class class class)co 5919 1c1 7875 + caddc 7877 ≤ cle 8057 ℤcz 9320 |
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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4148 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 ax-cnex 7965 ax-resscn 7966 ax-1cn 7967 ax-1re 7968 ax-icn 7969 ax-addcl 7970 ax-addrcl 7971 ax-mulcl 7972 ax-addcom 7974 ax-addass 7976 ax-distr 7978 ax-i2m1 7979 ax-0lt1 7980 ax-0id 7982 ax-rnegex 7983 ax-cnre 7985 ax-pre-ltirr 7986 ax-pre-ltwlin 7987 ax-pre-lttrn 7988 ax-pre-ltadd 7990 |
This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-nel 2460 df-ral 2477 df-rex 2478 df-reu 2479 df-rab 2481 df-v 2762 df-sbc 2987 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-br 4031 df-opab 4092 df-id 4325 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-iota 5216 df-fun 5257 df-fv 5263 df-riota 5874 df-ov 5922 df-oprab 5923 df-mpo 5924 df-pnf 8058 df-mnf 8059 df-xr 8060 df-ltxr 8061 df-le 8062 df-sub 8194 df-neg 8195 df-inn 8985 df-n0 9244 df-z 9321 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |