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| Mirrors > Home > MPE Home > Th. List > rerpdivcl | Structured version Visualization version GIF version | ||
| Description: Closure law for division of a real by a positive real. (Contributed by NM, 10-Nov-2008.) |
| Ref | Expression |
|---|---|
| rerpdivcl | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐴 / 𝐵) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rprene0 13141 | . 2 ⊢ (𝐵 ∈ ℝ+ → (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0)) | |
| 2 | redivcl 12039 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (𝐴 / 𝐵) ∈ ℝ) | |
| 3 | 2 | 3expb 1138 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0)) → (𝐴 / 𝐵) ∈ ℝ) |
| 4 | 1, 3 | sylan2 605 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ+) → (𝐴 / 𝐵) ∈ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2144 ≠ wne 2955 (class class class)co 7420 ℝcr 11202 0cc0 11203 / cdiv 11976 ℝ+crp 13123 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-po 5558 df-so 5559 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-er 8720 df-en 8977 df-dom 8978 df-sdom 8979 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 df-rp 13124 |
| This theorem is used by: ledivge1le 13196 rerpdivcld 13198 icccntr 13626 refldivcl 13966 fldivle 13974 ltdifltdiv 13977 modvalr 14015 flpmodeq 14017 mod0 14019 negmod0 14021 modlt 14023 moddiffl 14025 moddifz 14026 modid 14039 modcyc 14049 modadd1 14051 modmul1 14070 moddi 14085 modsubdir 14086 modirr 14088 sqrtdiv 15437 divrcnv 16026 gexdvds 19803 aaliou3lem8 26677 logdivlt 26954 cxp2limlem 27308 harmonicbnd4 27343 logexprlim 27557 bposlem7 27622 bposlem9 27624 chebbnd1lem3 27803 chebbnd1 27804 chto1ub 27808 chpo1ub 27812 vmadivsum 27814 rplogsumlem1 27816 dchrvmasumlema 27832 dchrvmasumiflem1 27833 dchrisum0fno1 27843 mulogsumlem 27863 logdivsum 27865 mulog2sumlem1 27866 selberg2lem 27882 selberg3lem1 27889 pntrmax 27896 pntpbnd1a 27917 pntpbnd1 27918 pntpbnd2 27919 pntpbnd 27920 pntibndlem3 27924 pntlem3 27941 pntleml 27943 pnt2 27945 subfacval3 36040 heiborlem6 38843 fldivmod 48507 ceildivmod 48508 |
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