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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 531 | . . 3 ⊢ (((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) → 𝑄 ∈ ℚ) | |
| 2 | elq 9825 | . . 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 541 | . . . . . 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 542 | . . . . . 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 529 | . . . . . . 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 535 | . . . . . 6 ⊢ (((((𝑋 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) ∧ ((𝑋 gcd 𝐵) = 1 ∧ 𝑄 ∈ ℚ)) ∧ (𝑚 ∈ ℤ ∧ 𝑛 ∈ ℕ)) ∧ 𝑄 = (𝑚 / 𝑛)) → 𝑚 ∈ ℤ) | |
| 9 | simplrr 536 | . . . . . 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 15651 | . . . . 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 4111 | . . . 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 2656 | . 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 1395 ∈ wcel 2200 ∃wrex 2509 class class class wbr 4083 ‘cfv 5318 (class class class)co 6007 1c1 8008 # cap 8736 / cdiv 8827 ℕcn 9118 2c2 9169 ℤcz 9454 ℤ≥cuz 9730 ℚcq 9822 gcd cgcd 12482 logb clogb 15625 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4199 ax-sep 4202 ax-nul 4210 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-iinf 4680 ax-cnex 8098 ax-resscn 8099 ax-1cn 8100 ax-1re 8101 ax-icn 8102 ax-addcl 8103 ax-addrcl 8104 ax-mulcl 8105 ax-mulrcl 8106 ax-addcom 8107 ax-mulcom 8108 ax-addass 8109 ax-mulass 8110 ax-distr 8111 ax-i2m1 8112 ax-0lt1 8113 ax-1rid 8114 ax-0id 8115 ax-rnegex 8116 ax-precex 8117 ax-cnre 8118 ax-pre-ltirr 8119 ax-pre-ltwlin 8120 ax-pre-lttrn 8121 ax-pre-apti 8122 ax-pre-ltadd 8123 ax-pre-mulgt0 8124 ax-pre-mulext 8125 ax-arch 8126 ax-caucvg 8127 ax-pre-suploc 8128 ax-addf 8129 ax-mulf 8130 |
| This theorem depends on definitions: df-bi 117 df-stab 836 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-if 3603 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-disj 4060 df-br 4084 df-opab 4146 df-mpt 4147 df-tr 4183 df-id 4384 df-po 4387 df-iso 4388 df-iord 4457 df-on 4459 df-ilim 4460 df-suc 4462 df-iom 4683 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-f1 5323 df-fo 5324 df-f1o 5325 df-fv 5326 df-isom 5327 df-riota 5960 df-ov 6010 df-oprab 6011 df-mpo 6012 df-of 6224 df-1st 6292 df-2nd 6293 df-recs 6457 df-irdg 6522 df-frec 6543 df-1o 6568 df-2o 6569 df-oadd 6572 df-er 6688 df-map 6805 df-pm 6806 df-en 6896 df-dom 6897 df-fin 6898 df-sup 7159 df-inf 7160 df-pnf 8191 df-mnf 8192 df-xr 8193 df-ltxr 8194 df-le 8195 df-sub 8327 df-neg 8328 df-reap 8730 df-ap 8737 df-div 8828 df-inn 9119 df-2 9177 df-3 9178 df-4 9179 df-n0 9378 df-z 9455 df-uz 9731 df-q 9823 df-rp 9858 df-xneg 9976 df-xadd 9977 df-ioo 10096 df-ico 10098 df-icc 10099 df-fz 10213 df-fzo 10347 df-fl 10498 df-mod 10553 df-seqfrec 10678 df-exp 10769 df-fac 10956 df-bc 10978 df-ihash 11006 df-shft 11334 df-cj 11361 df-re 11362 df-im 11363 df-rsqrt 11517 df-abs 11518 df-clim 11798 df-sumdc 11873 df-ef 12167 df-e 12168 df-dvds 12307 df-gcd 12483 df-prm 12638 df-rest 13282 df-topgen 13301 df-psmet 14515 df-xmet 14516 df-met 14517 df-bl 14518 df-mopn 14519 df-top 14680 df-topon 14693 df-bases 14725 df-ntr 14778 df-cn 14870 df-cnp 14871 df-tx 14935 df-cncf 15253 df-limced 15338 df-dvap 15339 df-relog 15540 df-rpcxp 15541 df-logb 15626 |
| This theorem is referenced by: 2logb9irrap 15659 |
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