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| Mirrors > Home > MPE Home > Th. List > Mathboxes > exple2lt6 | Structured version Visualization version GIF version | ||
| Description: A nonnegative integer to the power of itself is less than 6 if it is less than or equal to 2. (Contributed by AV, 16-Mar-2019.) |
| Ref | Expression |
|---|---|
| exple2lt6 | ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ≤ 2) → (𝑁↑𝑁) < 6) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0le2is012 12676 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ≤ 2) → (𝑁 = 0 ∨ 𝑁 = 1 ∨ 𝑁 = 2)) | |
| 2 | id 23 | . . . . 5 ⊢ (𝑁 = 0 → 𝑁 = 0) | |
| 3 | 2, 2 | oveq12d 7437 | . . . 4 ⊢ (𝑁 = 0 → (𝑁↑𝑁) = (0↑0)) |
| 4 | 0exp0e1 14120 | . . . . 5 ⊢ (0↑0) = 1 | |
| 5 | 1lt6 12443 | . . . . 5 ⊢ 1 < 6 | |
| 6 | 4, 5 | eqbrtri 5134 | . . . 4 ⊢ (0↑0) < 6 |
| 7 | 3, 6 | eqbrtrdi 5152 | . . 3 ⊢ (𝑁 = 0 → (𝑁↑𝑁) < 6) |
| 8 | id 23 | . . . . 5 ⊢ (𝑁 = 1 → 𝑁 = 1) | |
| 9 | 8, 8 | oveq12d 7437 | . . . 4 ⊢ (𝑁 = 1 → (𝑁↑𝑁) = (1↑1)) |
| 10 | ax-1cn 11173 | . . . . . 6 ⊢ 1 ∈ ℂ | |
| 11 | exp1 14121 | . . . . . 6 ⊢ (1 ∈ ℂ → (1↑1) = 1) | |
| 12 | 10, 11 | ax-mp 5 | . . . . 5 ⊢ (1↑1) = 1 |
| 13 | 12, 5 | eqbrtri 5134 | . . . 4 ⊢ (1↑1) < 6 |
| 14 | 9, 13 | eqbrtrdi 5152 | . . 3 ⊢ (𝑁 = 1 → (𝑁↑𝑁) < 6) |
| 15 | id 23 | . . . . 5 ⊢ (𝑁 = 2 → 𝑁 = 2) | |
| 16 | 15, 15 | oveq12d 7437 | . . . 4 ⊢ (𝑁 = 2 → (𝑁↑𝑁) = (2↑2)) |
| 17 | sq2 14251 | . . . . 5 ⊢ (2↑2) = 4 | |
| 18 | 4lt6 12440 | . . . . 5 ⊢ 4 < 6 | |
| 19 | 17, 18 | eqbrtri 5134 | . . . 4 ⊢ (2↑2) < 6 |
| 20 | 16, 19 | eqbrtrdi 5152 | . . 3 ⊢ (𝑁 = 2 → (𝑁↑𝑁) < 6) |
| 21 | 7, 14, 20 | 3jaoi 1454 | . 2 ⊢ ((𝑁 = 0 ∨ 𝑁 = 1 ∨ 𝑁 = 2) → (𝑁↑𝑁) < 6) |
| 22 | 1, 21 | syl 18 | 1 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ≤ 2) → (𝑁↑𝑁) < 6) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∨ w3o 1102 = wceq 1570 ∈ wcel 2146 class class class wbr 5111 (class class class)co 7419 ℂcc 11113 0cc0 11115 1c1 11116 < clt 11258 ≤ cle 11259 2c2 12310 4c4 12312 6c6 12314 ℕ0cn0 12519 ↑cexp 14115 |
| 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 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11171 ax-resscn 11172 ax-1cn 11173 ax-icn 11174 ax-addcl 11175 ax-addrcl 11176 ax-mulcl 11177 ax-mulrcl 11178 ax-mulcom 11179 ax-addass 11180 ax-mulass 11181 ax-distr 11182 ax-i2m1 11183 ax-1ne0 11184 ax-1rid 11185 ax-rnegex 11186 ax-rrecex 11187 ax-cnre 11188 ax-pre-lttri 11189 ax-pre-lttrn 11190 ax-pre-ltadd 11191 ax-pre-mulgt0 11192 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11260 df-mnf 11261 df-xr 11262 df-ltxr 11263 df-le 11264 df-sub 11458 df-neg 11459 df-nn 12249 df-2 12318 df-3 12319 df-4 12320 df-5 12321 df-6 12322 df-n0 12520 df-z 12607 df-uz 12879 df-seq 14056 df-exp 14116 |
| This theorem is used by: pgrple2abl 49202 |
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