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| Mirrors > Home > ILE Home > Th. List > rpmincl | GIF version | ||
| Description: The minumum of two positive real numbers is a positive real number. (Contributed by Jim Kingdon, 25-Apr-2023.) |
| Ref | Expression |
|---|---|
| rpmincl | ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → inf({𝐴, 𝐵}, ℝ, < ) ∈ ℝ+) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpre 9883 | . . 3 ⊢ (𝐴 ∈ ℝ+ → 𝐴 ∈ ℝ) | |
| 2 | rpre 9883 | . . 3 ⊢ (𝐵 ∈ ℝ+ → 𝐵 ∈ ℝ) | |
| 3 | mincl 11779 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → inf({𝐴, 𝐵}, ℝ, < ) ∈ ℝ) | |
| 4 | 1, 2, 3 | syl2an 289 | . 2 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → inf({𝐴, 𝐵}, ℝ, < ) ∈ ℝ) |
| 5 | rpgt0 9888 | . . . 4 ⊢ (𝐴 ∈ ℝ+ → 0 < 𝐴) | |
| 6 | rpgt0 9888 | . . . 4 ⊢ (𝐵 ∈ ℝ+ → 0 < 𝐵) | |
| 7 | 5, 6 | anim12i 338 | . . 3 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → (0 < 𝐴 ∧ 0 < 𝐵)) |
| 8 | 0red 8168 | . . . 4 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → 0 ∈ ℝ) | |
| 9 | 1 | adantr 276 | . . . 4 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → 𝐴 ∈ ℝ) |
| 10 | 2 | adantl 277 | . . . 4 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → 𝐵 ∈ ℝ) |
| 11 | ltmininf 11783 | . . . 4 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (0 < inf({𝐴, 𝐵}, ℝ, < ) ↔ (0 < 𝐴 ∧ 0 < 𝐵))) | |
| 12 | 8, 9, 10, 11 | syl3anc 1271 | . . 3 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → (0 < inf({𝐴, 𝐵}, ℝ, < ) ↔ (0 < 𝐴 ∧ 0 < 𝐵))) |
| 13 | 7, 12 | mpbird 167 | . 2 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → 0 < inf({𝐴, 𝐵}, ℝ, < )) |
| 14 | 4, 13 | elrpd 9916 | 1 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝐵 ∈ ℝ+) → inf({𝐴, 𝐵}, ℝ, < ) ∈ ℝ+) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2200 {cpr 3668 class class class wbr 4084 infcinf 7171 ℝcr 8019 0cc0 8020 < clt 8202 ℝ+crp 9876 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4200 ax-sep 4203 ax-nul 4211 ax-pow 4260 ax-pr 4295 ax-un 4526 ax-setind 4631 ax-iinf 4682 ax-cnex 8111 ax-resscn 8112 ax-1cn 8113 ax-1re 8114 ax-icn 8115 ax-addcl 8116 ax-addrcl 8117 ax-mulcl 8118 ax-mulrcl 8119 ax-addcom 8120 ax-mulcom 8121 ax-addass 8122 ax-mulass 8123 ax-distr 8124 ax-i2m1 8125 ax-0lt1 8126 ax-1rid 8127 ax-0id 8128 ax-rnegex 8129 ax-precex 8130 ax-cnre 8131 ax-pre-ltirr 8132 ax-pre-ltwlin 8133 ax-pre-lttrn 8134 ax-pre-apti 8135 ax-pre-ltadd 8136 ax-pre-mulgt0 8137 ax-pre-mulext 8138 ax-arch 8139 ax-caucvg 8140 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2802 df-sbc 3030 df-csb 3126 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-if 3604 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3890 df-int 3925 df-iun 3968 df-br 4085 df-opab 4147 df-mpt 4148 df-tr 4184 df-id 4386 df-po 4389 df-iso 4390 df-iord 4459 df-on 4461 df-ilim 4462 df-suc 4464 df-iom 4685 df-xp 4727 df-rel 4728 df-cnv 4729 df-co 4730 df-dm 4731 df-rn 4732 df-res 4733 df-ima 4734 df-iota 5282 df-fun 5324 df-fn 5325 df-f 5326 df-f1 5327 df-fo 5328 df-f1o 5329 df-fv 5330 df-isom 5331 df-riota 5964 df-ov 6014 df-oprab 6015 df-mpo 6016 df-1st 6296 df-2nd 6297 df-recs 6464 df-frec 6550 df-sup 7172 df-inf 7173 df-pnf 8204 df-mnf 8205 df-xr 8206 df-ltxr 8207 df-le 8208 df-sub 8340 df-neg 8341 df-reap 8743 df-ap 8750 df-div 8841 df-inn 9132 df-2 9190 df-3 9191 df-4 9192 df-n0 9391 df-z 9468 df-uz 9744 df-rp 9877 df-seqfrec 10698 df-exp 10789 df-cj 11390 df-re 11391 df-im 11392 df-rsqrt 11546 df-abs 11547 |
| This theorem is referenced by: ssblex 15142 addcncntoplem 15272 limcimolemlt 15375 limccnp2lem 15387 dveflem 15437 |
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