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| Mirrors > Home > MPE Home > Th. List > eluz1 | Structured version Visualization version GIF version | ||
| Description: Membership in the upper set of integers starting at 𝑀. (Contributed by NM, 5-Sep-2005.) |
| Ref | Expression |
|---|---|
| eluz1 | ⊢ (𝑀 ∈ ℤ → (𝑁 ∈ (ℤ≥‘𝑀) ↔ (𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uzval 12967 | . . 3 ⊢ (𝑀 ∈ ℤ → (ℤ≥‘𝑀) = {𝑘 ∈ ℤ ∣ 𝑀 ≤ 𝑘}) | |
| 2 | 1 | eleq2d 2846 | . 2 ⊢ (𝑀 ∈ ℤ → (𝑁 ∈ (ℤ≥‘𝑀) ↔ 𝑁 ∈ {𝑘 ∈ ℤ ∣ 𝑀 ≤ 𝑘})) |
| 3 | breq2 5106 | . . 3 ⊢ (𝑘 = 𝑁 → (𝑀 ≤ 𝑘 ↔ 𝑀 ≤ 𝑁)) | |
| 4 | 3 | elrab 3644 | . 2 ⊢ (𝑁 ∈ {𝑘 ∈ ℤ ∣ 𝑀 ≤ 𝑘} ↔ (𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁)) |
| 5 | 2, 4 | bitrdi 290 | 1 ⊢ (𝑀 ∈ ℤ → (𝑁 ∈ (ℤ≥‘𝑀) ↔ (𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2144 {crab 3412 class class class wbr 5102 ‘cfv 6538 ≤ cle 11344 ℤcz 12693 ℤ≥cuz 12965 |
| 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-pr 5390 ax-cnex 11256 ax-resscn 11257 |
| 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-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 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-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6540 df-fv 6546 df-ov 7423 df-neg 11544 df-z 12694 df-uz 12966 |
| This theorem is used by: eluz2 12971 eluz1i 12973 eluz 12979 uzid 12980 uzss 12988 eluzp1m1 12991 raluz 13023 rexuz 13025 preduz 13784 fi1uzind 14652 algcvga 16754 uzssico 33376 nndiffz1 33378 fzspl 33381 cycpmco2lem6 33692 cycpmconjslem2 33716 breprexplemc 35261 logblebd 43028 aks6d1c1 43167 aks6d1c2lem4 43178 lzunuz 43779 |
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