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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 2765 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 3 | infxrlbrnmpt2.b | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) | |
| 4 | 1, 2, 3 | rnmptssd 7123 | . 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 5951 | . . 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 13379 | . 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 2146 ⊆ wss 3906 class class class wbr 5111 ↦ cmpt 5194 ran crn 5664 infcinf 9408 ℝ*cxr 11259 < clt 11260 ≤ cle 11261 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11173 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-addrcl 11178 ax-mulcl 11179 ax-mulrcl 11180 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-i2m1 11185 ax-1ne0 11186 ax-1rid 11187 ax-rnegex 11188 ax-rrecex 11189 ax-cnre 11190 ax-pre-lttri 11191 ax-pre-lttrn 11192 ax-pre-ltadd 11193 ax-pre-mulgt0 11194 ax-pre-sup 11195 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-sup 9409 df-inf 9410 df-pnf 11262 df-mnf 11263 df-xr 11264 df-ltxr 11265 df-le 11266 df-sub 11460 df-neg 11461 |
| This theorem is used by: limsuplesup 46473 |
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