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| Mirrors > Home > MPE Home > Th. List > pnfged | Structured version Visualization version GIF version | ||
| Description: Plus infinity is an upper bound for extended reals. (Contributed by Glauco Siliprandi, 5-Feb-2022.) |
| Ref | Expression |
|---|---|
| pnfged.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| Ref | Expression |
|---|---|
| pnfged | ⊢ (𝜑 → 𝐴 ≤ +∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfged.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 2 | pnfge 13072 | . 2 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) | |
| 3 | 1, 2 | syl 17 | 1 ⊢ (𝜑 → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 class class class wbr 5086 +∞cpnf 11167 ℝ*cxr 11169 ≤ cle 11171 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5231 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-xp 5630 df-cnv 5632 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 |
| This theorem is referenced by: xrlimcnp 26945 lbslelsp 33757 xlimpnfvlem2 46283 xlimliminflimsup 46308 pimgtpnf2f 47151 pimiooltgt 47156 |
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