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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 13064 | . 2 ⊢ (𝐵 ∈ ℝ+ → (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0)) | |
| 2 | redivcl 11962 | . . 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 2145 ≠ wne 2957 (class class class)co 7417 ℝcr 11127 0cc0 11128 / cdiv 11899 ℝ+crp 13046 |
| 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-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-rmo 3367 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-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-po 5567 df-so 5568 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-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-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-div 11900 df-rp 13047 |
| This theorem is used by: ledivge1le 13119 rerpdivcld 13121 icccntr 13549 refldivcl 13888 fldivle 13896 ltdifltdiv 13899 modvalr 13937 flpmodeq 13939 mod0 13941 negmod0 13943 modlt 13945 moddiffl 13947 moddifz 13948 modid 13961 modcyc 13971 modadd1 13973 modmul1 13992 moddi 14007 modsubdir 14008 modirr 14010 sqrtdiv 15356 divrcnv 15945 gexdvds 19717 aaliou3lem8 26588 logdivlt 26866 cxp2limlem 27220 harmonicbnd4 27255 logexprlim 27469 bposlem7 27534 bposlem9 27536 chebbnd1lem3 27715 chebbnd1 27716 chto1ub 27720 chpo1ub 27724 vmadivsum 27726 rplogsumlem1 27728 dchrvmasumlema 27744 dchrvmasumiflem1 27745 dchrisum0fno1 27755 mulogsumlem 27775 logdivsum 27777 mulog2sumlem1 27778 selberg2lem 27794 selberg3lem1 27801 pntrmax 27808 pntpbnd1a 27829 pntpbnd1 27830 pntpbnd2 27831 pntpbnd 27832 pntibndlem3 27836 pntlem3 27853 pntleml 27855 pnt2 27857 subfacval3 35776 heiborlem6 38574 fldivmod 48240 ceildivmod 48241 |
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