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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 12689 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑁 ≤ 2) → (𝑁 = 0 ∨ 𝑁 = 1 ∨ 𝑁 = 2)) | |
| 2 | id 23 | . . . . 5 ⊢ (𝑁 = 0 → 𝑁 = 0) | |
| 3 | 2, 2 | oveq12d 7435 | . . . 4 ⊢ (𝑁 = 0 → (𝑁↑𝑁) = (0↑0)) |
| 4 | 0exp0e1 14134 | . . . . 5 ⊢ (0↑0) = 1 | |
| 5 | 1lt6 12456 | . . . . 5 ⊢ 1 < 6 | |
| 6 | 4, 5 | eqbrtri 5130 | . . . 4 ⊢ (0↑0) < 6 |
| 7 | 3, 6 | eqbrtrdi 5148 | . . 3 ⊢ (𝑁 = 0 → (𝑁↑𝑁) < 6) |
| 8 | id 23 | . . . . 5 ⊢ (𝑁 = 1 → 𝑁 = 1) | |
| 9 | 8, 8 | oveq12d 7435 | . . . 4 ⊢ (𝑁 = 1 → (𝑁↑𝑁) = (1↑1)) |
| 10 | ax-1cn 11186 | . . . . . 6 ⊢ 1 ∈ ℂ | |
| 11 | exp1 14135 | . . . . . 6 ⊢ (1 ∈ ℂ → (1↑1) = 1) | |
| 12 | 10, 11 | ax-mp 5 | . . . . 5 ⊢ (1↑1) = 1 |
| 13 | 12, 5 | eqbrtri 5130 | . . . 4 ⊢ (1↑1) < 6 |
| 14 | 9, 13 | eqbrtrdi 5148 | . . 3 ⊢ (𝑁 = 1 → (𝑁↑𝑁) < 6) |
| 15 | id 23 | . . . . 5 ⊢ (𝑁 = 2 → 𝑁 = 2) | |
| 16 | 15, 15 | oveq12d 7435 | . . . 4 ⊢ (𝑁 = 2 → (𝑁↑𝑁) = (2↑2)) |
| 17 | sq2 14265 | . . . . 5 ⊢ (2↑2) = 4 | |
| 18 | 4lt6 12453 | . . . . 5 ⊢ 4 < 6 | |
| 19 | 17, 18 | eqbrtri 5130 | . . . 4 ⊢ (2↑2) < 6 |
| 20 | 16, 19 | eqbrtrdi 5148 | . . 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 2145 class class class wbr 5107 (class class class)co 7417 ℂcc 11126 0cc0 11128 1c1 11129 < clt 11271 ≤ cle 11272 2c2 12323 4c4 12325 6c6 12327 ℕ0cn0 12532 ↑cexp 14129 |
| 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 |
| 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-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-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-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-nn 12262 df-2 12331 df-3 12332 df-4 12333 df-5 12334 df-6 12335 df-n0 12533 df-z 12620 df-uz 12892 df-seq 14070 df-exp 14130 |
| This theorem is used by: pgrple2abl 49303 |
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