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| Mirrors > Home > MPE Home > Th. List > peano2uz2 | Structured version Visualization version GIF version | ||
| Description: Second Peano postulate for upper integers. (Contributed by NM, 3-Oct-2004.) |
| Ref | Expression |
|---|---|
| peano2uz2 | ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥}) → (𝐵 + 1) ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | peano2z 12513 | . . . 4 ⊢ (𝐵 ∈ ℤ → (𝐵 + 1) ∈ ℤ) | |
| 2 | 1 | ad2antrl 728 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ (𝐵 ∈ ℤ ∧ 𝐴 ≤ 𝐵)) → (𝐵 + 1) ∈ ℤ) |
| 3 | zre 12472 | . . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ) | |
| 4 | zre 12472 | . . . . 5 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ) | |
| 5 | lep1 11962 | . . . . . . 7 ⊢ (𝐵 ∈ ℝ → 𝐵 ≤ (𝐵 + 1)) | |
| 6 | 5 | adantl 481 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → 𝐵 ≤ (𝐵 + 1)) |
| 7 | peano2re 11286 | . . . . . . . 8 ⊢ (𝐵 ∈ ℝ → (𝐵 + 1) ∈ ℝ) | |
| 8 | 7 | ancli 548 | . . . . . . 7 ⊢ (𝐵 ∈ ℝ → (𝐵 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ)) |
| 9 | letr 11207 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ) → ((𝐴 ≤ 𝐵 ∧ 𝐵 ≤ (𝐵 + 1)) → 𝐴 ≤ (𝐵 + 1))) | |
| 10 | 9 | 3expb 1120 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 ∈ ℝ ∧ (𝐵 + 1) ∈ ℝ)) → ((𝐴 ≤ 𝐵 ∧ 𝐵 ≤ (𝐵 + 1)) → 𝐴 ≤ (𝐵 + 1))) |
| 11 | 8, 10 | sylan2 593 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 ≤ 𝐵 ∧ 𝐵 ≤ (𝐵 + 1)) → 𝐴 ≤ (𝐵 + 1))) |
| 12 | 6, 11 | mpan2d 694 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 → 𝐴 ≤ (𝐵 + 1))) |
| 13 | 3, 4, 12 | syl2an 596 | . . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝐴 ≤ 𝐵 → 𝐴 ≤ (𝐵 + 1))) |
| 14 | 13 | impr 454 | . . 3 ⊢ ((𝐴 ∈ ℤ ∧ (𝐵 ∈ ℤ ∧ 𝐴 ≤ 𝐵)) → 𝐴 ≤ (𝐵 + 1)) |
| 15 | 2, 14 | jca 511 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ (𝐵 ∈ ℤ ∧ 𝐴 ≤ 𝐵)) → ((𝐵 + 1) ∈ ℤ ∧ 𝐴 ≤ (𝐵 + 1))) |
| 16 | breq2 5093 | . . . 4 ⊢ (𝑥 = 𝐵 → (𝐴 ≤ 𝑥 ↔ 𝐴 ≤ 𝐵)) | |
| 17 | 16 | elrab 3642 | . . 3 ⊢ (𝐵 ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥} ↔ (𝐵 ∈ ℤ ∧ 𝐴 ≤ 𝐵)) |
| 18 | 17 | anbi2i 623 | . 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥}) ↔ (𝐴 ∈ ℤ ∧ (𝐵 ∈ ℤ ∧ 𝐴 ≤ 𝐵))) |
| 19 | breq2 5093 | . . 3 ⊢ (𝑥 = (𝐵 + 1) → (𝐴 ≤ 𝑥 ↔ 𝐴 ≤ (𝐵 + 1))) | |
| 20 | 19 | elrab 3642 | . 2 ⊢ ((𝐵 + 1) ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥} ↔ ((𝐵 + 1) ∈ ℤ ∧ 𝐴 ≤ (𝐵 + 1))) |
| 21 | 15, 18, 20 | 3imtr4i 292 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥}) → (𝐵 + 1) ∈ {𝑥 ∈ ℤ ∣ 𝐴 ≤ 𝑥}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2111 {crab 3395 class class class wbr 5089 (class class class)co 7346 ℝcr 11005 1c1 11007 + caddc 11009 ≤ cle 11147 ℤcz 12468 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 ax-resscn 11063 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-addrcl 11067 ax-mulcl 11068 ax-mulrcl 11069 ax-mulcom 11070 ax-addass 11071 ax-mulass 11072 ax-distr 11073 ax-i2m1 11074 ax-1ne0 11075 ax-1rid 11076 ax-rnegex 11077 ax-rrecex 11078 ax-cnre 11079 ax-pre-lttri 11080 ax-pre-lttrn 11081 ax-pre-ltadd 11082 ax-pre-mulgt0 11083 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-sub 11346 df-neg 11347 df-nn 12126 df-n0 12382 df-z 12469 |
| This theorem is referenced by: dfuzi 12564 |
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