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| Mirrors > Home > ILE Home > Th. List > logbgcd1irrap | GIF version | ||
| Description: The logarithm of an integer greater than 1 to an integer base greater than 1 is irrational (in the sense of being apart from any rational number) if the argument and the base are relatively prime. For example, (2 logb 9) # 𝑄 where 𝑄 is rational. (Contributed by AV, 29-Dec-2022.) |
| Ref | Expression |
|---|---|
| logbgcd1irrap | ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → (𝐵 logb 𝑋) # 𝑄) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simprr 533 | . . 3 ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → 𝑄 ∈ ℚ) | |
| 2 | elq 9975 | . . 3 ⊢ (𝑄 ∈ ℚ ↔ ∃𝑚 ∈ ℤ ∃𝑛 ∈ ℕ 𝑄 = (𝑚 / 𝑛)) | |
| 3 | 1, 2 | sylib 122 | . 2 ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → ∃𝑚 ∈ ℤ ∃𝑛 ∈ ℕ 𝑄 = (𝑚 / 𝑛)) |
| 4 | simp-4l 543 | . . . . . 6 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → 𝑋 ∈ (ℤ≥‘2)) | |
| 5 | simp-4r 544 | . . . . . 6 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → 𝐵 ∈ (ℤ≥‘2)) | |
| 6 | simprl 531 | . . . . . . 7 ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → (𝑋 gcd 𝐵) = 1) | |
| 7 | 6 | ad2antrr 488 | . . . . . 6 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → (𝑋 gcd 𝐵) = 1) |
| 8 | simplrl 537 | . . . . . 6 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → 𝑚 ∈ ℤ) | |
| 9 | simplrr 538 | . . . . . 6 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → 𝑛 ∈ ℕ) | |
| 10 | 4, 5, 7, 8, 9 | logbgcd1irraplemap 15963 | . . . . 5 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → (𝐵 logb 𝑋) # (𝑚 / 𝑛)) |
| 11 | simpr 110 | . . . . 5 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → 𝑄 = (𝑚 / 𝑛)) | |
| 12 | 10, 11 | breqtrrd 4142 | . . . 4 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → (𝐵 logb 𝑋) # 𝑄) |
| 13 | 12 | ex 115 | . . 3 ⊢ ((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) → (𝑄 = (𝑚 / 𝑛) → (𝐵 logb 𝑋) # 𝑄)) |
| 14 | 13 | rexlimdvva 2670 | . 2 ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → (∃𝑚 ∈ ℤ ∃𝑛 ∈ ℕ 𝑄 = (𝑚 / 𝑛) → (𝐵 logb 𝑋) # 𝑄)) |
| 15 | 3, 14 | mpd 13 | 1 ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → (𝐵 logb 𝑋) # 𝑄) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2205 ∃wrex 2523 class class class wbr 4114 ‘cfv 5357 (class class class)co 6058 1c1 8144 # cap 8873 / cdiv 8966 ℕcn 9257 2c2 9308 ℤcz 9597 ℤ≥cuz 9874 ℚcq 9972 gcd cgcd 12677 logb clogb 15937 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-nul 4241 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-iinf 4715 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-mulrcl 8242 ax-addcom 8243 ax-mulcom 8244 ax-addass 8245 ax-mulass 8246 ax-distr 8247 ax-i2m1 8248 ax-0lt1 8249 ax-1rid 8250 ax-0id 8251 ax-rnegex 8252 ax-precex 8253 ax-cnre 8254 ax-pre-ltirr 8255 ax-pre-ltwlin 8256 ax-pre-lttrn 8257 ax-pre-apti 8258 ax-pre-ltadd 8259 ax-pre-mulgt0 8260 ax-pre-mulext 8261 ax-arch 8262 ax-caucvg 8263 ax-pre-suploc 8264 ax-addf 8265 ax-mulf 8266 |
| This theorem depends on definitions: df-bi 117 df-stab 839 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-if 3625 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-disj 4091 df-br 4115 df-opab 4177 df-mpt 4178 df-tr 4214 df-id 4419 df-po 4422 df-iso 4423 df-iord 4492 df-on 4494 df-ilim 4495 df-suc 4497 df-iom 4718 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-isom 5366 df-riota 6011 df-ov 6061 df-oprab 6062 df-mpo 6063 df-of 6275 df-1st 6347 df-2nd 6348 df-recs 6549 df-irdg 6614 df-frec 6635 df-1o 6660 df-2o 6661 df-oadd 6664 df-er 6780 df-map 6897 df-pm 6898 df-en 6989 df-dom 6990 df-fin 6991 df-sup 7288 df-inf 7289 df-pnf 8326 df-mnf 8327 df-xr 8328 df-ltxr 8329 df-le 8330 df-sub 8463 df-neg 8464 df-reap 8867 df-ap 8874 df-div 8967 df-inn 9258 df-2 9316 df-3 9317 df-4 9318 df-n0 9517 df-z 9598 df-uz 9875 df-q 9973 df-rp 10008 df-xneg 10127 df-xadd 10128 df-ioo 10247 df-ico 10249 df-icc 10250 df-fz 10365 df-fzo 10502 df-fl 10657 df-mod 10712 df-seqfrec 10837 df-exp 10928 df-fac 11116 df-bc 11138 df-ihash 11167 df-shft 11528 df-cj 11555 df-re 11556 df-im 11557 df-rsqrt 11711 df-abs 11712 df-clim 11992 df-sumdc 12067 df-ef 12362 df-e 12363 df-dvds 12502 df-gcd 12678 df-prm 12833 df-rest 13541 df-topgen 13560 df-psmet 14820 df-xmet 14821 df-met 14822 df-bl 14823 df-mopn 14824 df-top 14992 df-topon 15005 df-bases 15037 df-ntr 15090 df-cn 15182 df-cnp 15183 df-tx 15247 df-cncf 15565 df-limced 15650 df-dvap 15651 df-relog 15852 df-rpcxp 15853 df-logb 15938 |
| This theorem is referenced by: 2logb9irrap 15971 |
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