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Mirrors > Home > MPE Home > Th. List > Mathboxes > dp2cl | Structured version Visualization version GIF version |
Description: Closure for the decimal fraction constructor if both values are reals. (Contributed by David A. Wheeler, 15-May-2015.) |
Ref | Expression |
---|---|
dp2cl | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → _𝐴𝐵 ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-dp2 31244 | . 2 ⊢ _𝐴𝐵 = (𝐴 + (𝐵 / ;10)) | |
2 | 10re 12516 | . . . 4 ⊢ ;10 ∈ ℝ | |
3 | 10pos 12514 | . . . . 5 ⊢ 0 < ;10 | |
4 | 2, 3 | gt0ne0ii 11571 | . . . 4 ⊢ ;10 ≠ 0 |
5 | redivcl 11754 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ ;10 ∈ ℝ ∧ ;10 ≠ 0) → (𝐵 / ;10) ∈ ℝ) | |
6 | 2, 4, 5 | mp3an23 1452 | . . 3 ⊢ (𝐵 ∈ ℝ → (𝐵 / ;10) ∈ ℝ) |
7 | readdcl 11014 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ (𝐵 / ;10) ∈ ℝ) → (𝐴 + (𝐵 / ;10)) ∈ ℝ) | |
8 | 6, 7 | sylan2 593 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + (𝐵 / ;10)) ∈ ℝ) |
9 | 1, 8 | eqeltrid 2840 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → _𝐴𝐵 ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2103 ≠ wne 2939 (class class class)co 7308 ℝcr 10930 0cc0 10931 1c1 10932 + caddc 10934 / cdiv 11692 ;cdc 12497 _cdp2 31243 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1910 ax-6 1968 ax-7 2008 ax-8 2105 ax-9 2113 ax-10 2134 ax-11 2151 ax-12 2168 ax-ext 2706 ax-sep 5231 ax-nul 5238 ax-pow 5296 ax-pr 5360 ax-un 7621 ax-resscn 10988 ax-1cn 10989 ax-icn 10990 ax-addcl 10991 ax-addrcl 10992 ax-mulcl 10993 ax-mulrcl 10994 ax-mulcom 10995 ax-addass 10996 ax-mulass 10997 ax-distr 10998 ax-i2m1 10999 ax-1ne0 11000 ax-1rid 11001 ax-rnegex 11002 ax-rrecex 11003 ax-cnre 11004 ax-pre-lttri 11005 ax-pre-lttrn 11006 ax-pre-ltadd 11007 ax-pre-mulgt0 11008 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1541 df-fal 1551 df-ex 1779 df-nf 1783 df-sb 2065 df-mo 2537 df-eu 2566 df-clab 2713 df-cleq 2727 df-clel 2813 df-nfc 2885 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3339 df-reu 3340 df-rab 3357 df-v 3438 df-sbc 3721 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4565 df-pr 4567 df-op 4571 df-uni 4844 df-iun 4932 df-br 5081 df-opab 5143 df-mpt 5164 df-tr 5198 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7265 df-ov 7311 df-oprab 7312 df-mpo 7313 df-om 7749 df-2nd 7868 df-frecs 8132 df-wrecs 8163 df-recs 8237 df-rdg 8276 df-er 8534 df-en 8770 df-dom 8771 df-sdom 8772 df-pnf 11071 df-mnf 11072 df-xr 11073 df-ltxr 11074 df-le 11075 df-sub 11267 df-neg 11268 df-div 11693 df-nn 12034 df-2 12096 df-3 12097 df-4 12098 df-5 12099 df-6 12100 df-7 12101 df-8 12102 df-9 12103 df-dec 12498 df-dp2 31244 |
This theorem is referenced by: dpcl 31263 dpmul100 31269 dp3mul10 31270 dpmul1000 31271 dpadd2 31282 dpadd3 31284 dpmul 31285 dpmul4 31286 hgt750lemd 32724 hgt750lem 32727 hgt750lem2 32728 hgt750leme 32734 |
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