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| Mirrors > Home > MPE Home > Th. List > Mathboxes > gpg3kgrtriexlem4 | Structured version Visualization version GIF version | ||
| Description: Lemma 4 for gpg3kgrtriex 48895. (Contributed by AV, 1-Oct-2025.) |
| Ref | Expression |
|---|---|
| gpg3kgrtriex.n | ⊢ 𝑁 = (3 · 𝐾) |
| Ref | Expression |
|---|---|
| gpg3kgrtriexlem4 | ⊢ (𝐾 ∈ ℕ → 𝐾 ∈ (1..^(⌈‘(𝑁 / 2)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 23 | . 2 ⊢ (𝐾 ∈ ℕ → 𝐾 ∈ ℕ) | |
| 2 | gpg3kgrtriex.n | . . . . . 6 ⊢ 𝑁 = (3 · 𝐾) | |
| 3 | 2 | oveq1i 7433 | . . . . 5 ⊢ (𝑁 / 2) = ((3 · 𝐾) / 2) |
| 4 | 3re 12339 | . . . . . . . 8 ⊢ 3 ∈ ℝ | |
| 5 | 4 | a1i 11 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → 3 ∈ ℝ) |
| 6 | nnre 12258 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → 𝐾 ∈ ℝ) | |
| 7 | 5, 6 | remulcld 11257 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → (3 · 𝐾) ∈ ℝ) |
| 8 | 7 | rehalfcld 12509 | . . . . 5 ⊢ (𝐾 ∈ ℕ → ((3 · 𝐾) / 2) ∈ ℝ) |
| 9 | 3, 8 | eqeltrid 2870 | . . . 4 ⊢ (𝐾 ∈ ℕ → (𝑁 / 2) ∈ ℝ) |
| 10 | 9 | ceilcld 13896 | . . 3 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℤ) |
| 11 | 1red 11227 | . . . 4 ⊢ (𝐾 ∈ ℕ → 1 ∈ ℝ) | |
| 12 | 2, 7 | eqeltrid 2870 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → 𝑁 ∈ ℝ) |
| 13 | 12 | rehalfcld 12509 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → (𝑁 / 2) ∈ ℝ) |
| 14 | 13 | ceilcld 13896 | . . . . 5 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℤ) |
| 15 | 14 | zred 12718 | . . . 4 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℝ) |
| 16 | nnge1 12282 | . . . 4 ⊢ (𝐾 ∈ ℕ → 1 ≤ 𝐾) | |
| 17 | 8 | ceilcld 13896 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → (⌈‘((3 · 𝐾) / 2)) ∈ ℤ) |
| 18 | 17 | zred 12718 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → (⌈‘((3 · 𝐾) / 2)) ∈ ℝ) |
| 19 | gpg3kgrtriexlem1 48889 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → 𝐾 < (⌈‘((3 · 𝐾) / 2))) | |
| 20 | 6, 18, 19 | ltled 11376 | . . . . 5 ⊢ (𝐾 ∈ ℕ → 𝐾 ≤ (⌈‘((3 · 𝐾) / 2))) |
| 21 | 3 | fveq2i 6891 | . . . . 5 ⊢ (⌈‘(𝑁 / 2)) = (⌈‘((3 · 𝐾) / 2)) |
| 22 | 20, 21 | breqtrrdi 5158 | . . . 4 ⊢ (𝐾 ∈ ℕ → 𝐾 ≤ (⌈‘(𝑁 / 2))) |
| 23 | 11, 6, 15, 16, 22 | letrd 11385 | . . 3 ⊢ (𝐾 ∈ ℕ → 1 ≤ (⌈‘(𝑁 / 2))) |
| 24 | elnnz1 12638 | . . 3 ⊢ ((⌈‘(𝑁 / 2)) ∈ ℕ ↔ ((⌈‘(𝑁 / 2)) ∈ ℤ ∧ 1 ≤ (⌈‘(𝑁 / 2)))) | |
| 25 | 10, 23, 24 | sylanbrc 595 | . 2 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℕ) |
| 26 | 19, 21 | breqtrrdi 5158 | . 2 ⊢ (𝐾 ∈ ℕ → 𝐾 < (⌈‘(𝑁 / 2))) |
| 27 | elfzo1 13760 | . 2 ⊢ (𝐾 ∈ (1..^(⌈‘(𝑁 / 2))) ↔ (𝐾 ∈ ℕ ∧ (⌈‘(𝑁 / 2)) ∈ ℕ ∧ 𝐾 < (⌈‘(𝑁 / 2)))) | |
| 28 | 1, 25, 26, 27 | syl3anbrc 1362 | 1 ⊢ (𝐾 ∈ ℕ → 𝐾 ∈ (1..^(⌈‘(𝑁 / 2)))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 class class class wbr 5114 ‘cfv 6543 (class class class)co 7423 ℝcr 11117 1c1 11119 · cmul 11123 < clt 11261 ≤ cle 11262 / cdiv 11889 ℕcn 12251 2c2 12313 3c3 12314 ℤcz 12609 ..^cfzo 13701 ⌈cceil 13844 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 ax-pre-sup 11196 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-1st 7995 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-sup 9412 df-inf 9413 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-div 11890 df-nn 12252 df-2 12321 df-3 12322 df-n0 12523 df-z 12610 df-uz 12881 df-rp 13035 df-fz 13554 df-fzo 13702 df-fl 13845 df-ceil 13846 |
| This theorem is used by: gpg3kgrtriex 48895 |
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