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| Mirrors > Home > ILE Home > Th. List > rehalfcld | GIF version | ||
| Description: Real closure of half. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| rehalfcld.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| Ref | Expression |
|---|---|
| rehalfcld | ⊢ (𝜑 → (𝐴 / 2) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rehalfcld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | rehalfcl 9543 | . 2 ⊢ (𝐴 ∈ ℝ → (𝐴 / 2) ∈ ℝ) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐴 / 2) ∈ ℝ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 (class class class)co 6088 ℝcr 8184 / cdiv 9010 2c2 9364 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-mulrcl 8284 ax-addcom 8285 ax-mulcom 8286 ax-addass 8287 ax-mulass 8288 ax-distr 8289 ax-i2m1 8290 ax-0lt1 8291 ax-1rid 8292 ax-0id 8293 ax-rnegex 8294 ax-precex 8295 ax-cnre 8296 ax-pre-ltirr 8297 ax-pre-ltwlin 8298 ax-pre-lttrn 8299 ax-pre-apti 8300 ax-pre-ltadd 8301 ax-pre-mulgt0 8302 ax-pre-mulext 8303 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-opab 4194 df-id 4440 df-po 4443 df-iso 4444 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-iota 5340 df-fun 5382 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8368 df-mnf 8369 df-xr 8370 df-ltxr 8371 df-le 8372 df-sub 8506 df-neg 8507 df-reap 8911 df-ap 8918 df-div 9011 df-2 9372 |
| This theorem is used by: div4p1lem1div2 9570 fldiv4p1lem1div2 10761 fldiv4lem1div2uz2 10762 facavg 11206 recl 11640 crre 11644 cvg1nlemres 11773 recvguniqlem 11782 resqrexlemp1rp 11794 resqrexlemfp1 11797 maxabslemlub 11996 maxabslemval 11997 maxcl 11999 resin4p 12510 recos4p 12511 cos01bnd 12550 cos12dec 12560 nno 12698 4sqlem5 13190 4sqlem6 13191 4sqlem10 13195 4sqlem15 13213 4sqlem16 13214 blhalf 15634 ioo2bl 15777 ioo2blex 15778 maxcncf 15841 mincncf 15842 cosordlem 16077 birthdaylem3 16227 chtqub 16296 bcmono 16304 gausslemma2dlem1a 16382 gausslemma2dlem2 16386 gausslemma2dlem3 16387 lgsquadlem1 16401 lgsquadlem2 16402 2lgslem1a2 16411 2lgslem1c 16414 2sqlem8 16447 apdifflemf 17302 |
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