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| Mirrors > Home > MPE Home > Th. List > Mathboxes > relogbcld | Structured version Visualization version GIF version | ||
| Description: Closure of the general logarithm with a positive real base on positive reals, a deduction version. (Contributed by metakunt, 22-May-2024.) |
| Ref | Expression |
|---|---|
| relogbcld.1 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| relogbcld.2 | ⊢ (𝜑 → 0 < 𝐵) |
| relogbcld.3 | ⊢ (𝜑 → 𝑋 ∈ ℝ) |
| relogbcld.4 | ⊢ (𝜑 → 0 < 𝑋) |
| relogbcld.5 | ⊢ (𝜑 → 𝐵 ≠ 1) |
| Ref | Expression |
|---|---|
| relogbcld | ⊢ (𝜑 → (𝐵 logb 𝑋) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relogbcld.1 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 2 | relogbcld.2 | . . . 4 ⊢ (𝜑 → 0 < 𝐵) | |
| 3 | 1, 2 | elrpd 13035 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ+) |
| 4 | relogbcld.3 | . . . 4 ⊢ (𝜑 → 𝑋 ∈ ℝ) | |
| 5 | relogbcld.4 | . . . 4 ⊢ (𝜑 → 0 < 𝑋) | |
| 6 | 4, 5 | elrpd 13035 | . . 3 ⊢ (𝜑 → 𝑋 ∈ ℝ+) |
| 7 | relogbcld.5 | . . 3 ⊢ (𝜑 → 𝐵 ≠ 1) | |
| 8 | 3, 6, 7 | 3jca 1142 | . 2 ⊢ (𝜑 → (𝐵 ∈ ℝ+ ∧ 𝑋 ∈ ℝ+ ∧ 𝐵 ≠ 1)) |
| 9 | relogbcl 26839 | . 2 ⊢ ((𝐵 ∈ ℝ+ ∧ 𝑋 ∈ ℝ+ ∧ 𝐵 ≠ 1) → (𝐵 logb 𝑋) ∈ ℝ) | |
| 10 | 8, 9 | syl 17 | 1 ⊢ (𝜑 → (𝐵 logb 𝑋) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1099 ∈ wcel 2143 ≠ wne 2958 class class class wbr 5101 (class class class)co 7397 ℝcr 11073 0cc0 11074 1c1 11075 < clt 11217 ℝ+crp 12994 logb clogb 26830 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7719 ax-inf2 9597 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-pre-mulgt0 11151 ax-pre-sup 11152 ax-addf 11153 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-tp 4588 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-iin 4953 df-br 5102 df-opab 5164 df-mpt 5183 df-tr 5209 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-se 5602 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6289 df-ord 6350 df-on 6351 df-lim 6352 df-suc 6353 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-isom 6531 df-riota 7354 df-ov 7400 df-oprab 7401 df-mpo 7402 df-of 7661 df-om 7848 df-1st 7971 df-2nd 7972 df-supp 8142 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8382 df-1o 8438 df-2o 8439 df-er 8679 df-map 8811 df-pm 8812 df-ixp 8881 df-en 8929 df-dom 8930 df-sdom 8931 df-fin 8932 df-fsupp 9309 df-fi 9358 df-sup 9389 df-inf 9390 df-oi 9459 df-card 9898 df-pnf 11219 df-mnf 11220 df-xr 11221 df-ltxr 11222 df-le 11223 df-sub 11417 df-neg 11418 df-div 11846 df-nn 12212 df-2 12281 df-3 12282 df-4 12283 df-5 12284 df-6 12285 df-7 12286 df-8 12287 df-9 12288 df-n0 12483 df-z 12570 df-dec 12690 df-uz 12841 df-q 12951 df-rp 12995 df-xneg 13115 df-xadd 13116 df-xmul 13117 df-ioo 13354 df-ioc 13355 df-ico 13356 df-icc 13357 df-fz 13514 df-fzo 13661 df-fl 13803 df-mod 13881 df-seq 14016 df-exp 14076 df-fac 14288 df-bc 14317 df-hash 14345 df-shft 15081 df-cj 15127 df-re 15128 df-im 15129 df-sqrt 15263 df-abs 15264 df-limsup 15499 df-clim 15516 df-rlim 15517 df-sum 15715 df-ef 16098 df-sin 16100 df-cos 16101 df-pi 16103 df-struct 17184 df-sets 17201 df-slot 17219 df-ndx 17231 df-base 17247 df-ress 17268 df-plusg 17300 df-mulr 17301 df-starv 17302 df-sca 17303 df-vsca 17304 df-ip 17305 df-tset 17306 df-ple 17307 df-ds 17309 df-unif 17310 df-hom 17311 df-cco 17312 df-rest 17452 df-topn 17453 df-0g 17471 df-gsum 17472 df-topgen 17473 df-pt 17474 df-prds 17477 df-xrs 17533 df-qtop 17538 df-imas 17539 df-xps 17541 df-mre 17615 df-mrc 17616 df-acs 17618 df-mgm 18675 df-sgrp 18754 df-mnd 18770 df-submnd 18819 df-mulg 19111 df-cntz 19358 df-cmn 19823 df-psmet 21417 df-xmet 21418 df-met 21419 df-bl 21420 df-mopn 21421 df-fbas 21422 df-fg 21423 df-cnfld 21426 df-top 22955 df-topon 22972 df-topsp 22994 df-bases 23007 df-cld 23080 df-ntr 23081 df-cls 23082 df-nei 23159 df-lp 23197 df-perf 23198 df-cn 23288 df-cnp 23289 df-haus 23376 df-tx 23623 df-hmeo 23816 df-fil 23907 df-fm 23999 df-flim 24000 df-flf 24001 df-xms 24381 df-ms 24382 df-tms 24383 df-cncf 24941 df-limc 25929 df-dv 25930 df-log 26622 df-logb 26831 |
| This theorem is referenced by: 3lexlogpow5ineq2 42673 3lexlogpow5ineq4 42674 3lexlogpow5ineq3 42675 3lexlogpow2ineq1 42676 3lexlogpow2ineq2 42677 3lexlogpow5ineq5 42678 aks4d1lem1 42680 aks4d1p1p3 42687 aks4d1p1p2 42688 aks4d1p1p4 42689 aks4d1p1p6 42691 aks4d1p1p7 42692 aks4d1p1p5 42693 aks4d1p1 42694 aks4d1p2 42695 aks4d1p3 42696 aks4d1p5 42698 aks4d1p6 42699 aks4d1p7d1 42700 aks4d1p7 42701 aks4d1p8 42705 aks4d1p9 42706 aks6d1c3 42741 aks6d1c6lem4 42791 aks6d1c7lem1 42798 aks6d1c7lem2 42799 |
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