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| Mirrors > Home > MPE Home > Th. List > Mathboxes > gpg3kgrtriexlem4 | Structured version Visualization version GIF version | ||
| Description: Lemma 4 for gpg3kgrtriex 49013. (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 7427 | . . . . 5 ⊢ (𝑁 / 2) = ((3 · 𝐾) / 2) |
| 4 | 3re 12349 | . . . . . . . 8 ⊢ 3 ∈ ℝ | |
| 5 | 4 | a1i 11 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → 3 ∈ ℝ) |
| 6 | nnre 12268 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → 𝐾 ∈ ℝ) | |
| 7 | 5, 6 | remulcld 11267 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → (3 · 𝐾) ∈ ℝ) |
| 8 | 7 | rehalfcld 12519 | . . . . 5 ⊢ (𝐾 ∈ ℕ → ((3 · 𝐾) / 2) ∈ ℝ) |
| 9 | 3, 8 | eqeltrid 2866 | . . . 4 ⊢ (𝐾 ∈ ℕ → (𝑁 / 2) ∈ ℝ) |
| 10 | 9 | ceilcld 13908 | . . 3 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℤ) |
| 11 | 1red 11237 | . . . 4 ⊢ (𝐾 ∈ ℕ → 1 ∈ ℝ) | |
| 12 | 2, 7 | eqeltrid 2866 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → 𝑁 ∈ ℝ) |
| 13 | 12 | rehalfcld 12519 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → (𝑁 / 2) ∈ ℝ) |
| 14 | 13 | ceilcld 13908 | . . . . 5 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℤ) |
| 15 | 14 | zred 12729 | . . . 4 ⊢ (𝐾 ∈ ℕ → (⌈‘(𝑁 / 2)) ∈ ℝ) |
| 16 | nnge1 12292 | . . . 4 ⊢ (𝐾 ∈ ℕ → 1 ≤ 𝐾) | |
| 17 | 8 | ceilcld 13908 | . . . . . . 7 ⊢ (𝐾 ∈ ℕ → (⌈‘((3 · 𝐾) / 2)) ∈ ℤ) |
| 18 | 17 | zred 12729 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → (⌈‘((3 · 𝐾) / 2)) ∈ ℝ) |
| 19 | gpg3kgrtriexlem1 49007 | . . . . . 6 ⊢ (𝐾 ∈ ℕ → 𝐾 < (⌈‘((3 · 𝐾) / 2))) | |
| 20 | 6, 18, 19 | ltled 11386 | . . . . 5 ⊢ (𝐾 ∈ ℕ → 𝐾 ≤ (⌈‘((3 · 𝐾) / 2))) |
| 21 | 3 | fveq2i 6885 | . . . . 5 ⊢ (⌈‘(𝑁 / 2)) = (⌈‘((3 · 𝐾) / 2)) |
| 22 | 20, 21 | breqtrrdi 5151 | . . . 4 ⊢ (𝐾 ∈ ℕ → 𝐾 ≤ (⌈‘(𝑁 / 2))) |
| 23 | 11, 6, 15, 16, 22 | letrd 11395 | . . 3 ⊢ (𝐾 ∈ ℕ → 1 ≤ (⌈‘(𝑁 / 2))) |
| 24 | elnnz1 12648 | . . 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 5151 | . 2 ⊢ (𝐾 ∈ ℕ → 𝐾 < (⌈‘(𝑁 / 2))) |
| 27 | elfzo1 13772 | . 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 2145 class class class wbr 5107 ‘cfv 6537 (class class class)co 7417 ℝcr 11127 1c1 11129 · cmul 11133 < clt 11271 ≤ cle 11272 / cdiv 11899 ℕcn 12261 2c2 12323 3c3 12324 ℤcz 12619 ..^cfzo 13713 ⌈cceil 13856 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 ax-pre-sup 11206 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8957 df-dom 8958 df-sdom 8959 df-sup 9416 df-inf 9417 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-div 11900 df-nn 12262 df-2 12331 df-3 12332 df-n0 12533 df-z 12620 df-uz 12892 df-rp 13047 df-fz 13566 df-fzo 13714 df-fl 13857 df-ceil 13858 |
| This theorem is used by: gpg3kgrtriex 49013 |
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