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| Mirrors > Home > MPE Home > Th. List > Mathboxes > infxrlbrnmpt2 | Structured version Visualization version GIF version | ||
| Description: A member of a nonempty indexed set of reals is greater than or equal to the set's lower bound. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| infxrlbrnmpt2.x | ⊢ Ⅎ𝑥𝜑 |
| infxrlbrnmpt2.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) |
| infxrlbrnmpt2.c | ⊢ (𝜑 → 𝐶 ∈ 𝐴) |
| infxrlbrnmpt2.d | ⊢ (𝜑 → 𝐷 ∈ ℝ*) |
| infxrlbrnmpt2.e | ⊢ (𝑥 = 𝐶 → 𝐵 = 𝐷) |
| Ref | Expression |
|---|---|
| infxrlbrnmpt2 | ⊢ (𝜑 → inf(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | infxrlbrnmpt2.x | . . 3 ⊢ Ⅎ𝑥𝜑 | |
| 2 | eqid 2760 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 3 | infxrlbrnmpt2.b | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) | |
| 4 | 1, 2, 3 | rnmptssd 7118 | . 2 ⊢ (𝜑 → ran (𝑥 ∈ 𝐴 ↦ 𝐵) ⊆ ℝ*) |
| 5 | infxrlbrnmpt2.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ 𝐴) | |
| 6 | infxrlbrnmpt2.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ ℝ*) | |
| 7 | infxrlbrnmpt2.e | . . . 4 ⊢ (𝑥 = 𝐶 → 𝐵 = 𝐷) | |
| 8 | 2, 7 | elrnmpt1s 5943 | . . 3 ⊢ ((𝐶 ∈ 𝐴 ∧ 𝐷 ∈ ℝ*) → 𝐷 ∈ ran (𝑥 ∈ 𝐴 ↦ 𝐵)) |
| 9 | 5, 6, 8 | syl2anc 596 | . 2 ⊢ (𝜑 → 𝐷 ∈ ran (𝑥 ∈ 𝐴 ↦ 𝐵)) |
| 10 | infxrlb 13390 | . 2 ⊢ ((ran (𝑥 ∈ 𝐴 ↦ 𝐵) ⊆ ℝ* ∧ 𝐷 ∈ ran (𝑥 ∈ 𝐴 ↦ 𝐵)) → inf(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐷) | |
| 11 | 4, 9, 10 | syl2anc 596 | 1 ⊢ (𝜑 → inf(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐷) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 Ⅎwnf 1816 ∈ wcel 2145 ⊆ wss 3899 class class class wbr 5103 ↦ cmpt 5186 ran crn 5656 infcinf 9414 ℝ*cxr 11269 < clt 11270 ≤ cle 11271 |
| 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 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 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 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 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9415 df-inf 9416 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 |
| This theorem is used by: limsuplesup 46530 |
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