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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 13150 | . 2 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝜑 → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 class class class wbr 5109 +∞cpnf 11235 ℝ*cxr 11237 ≤ cle 11239 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-xp 5667 df-cnv 5669 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 |
| This theorem is referenced by: xrlimcnp 27133 lbslelsp 33988 xlimpnfvlem2 46551 xlimliminflimsup 46576 fourierdlem48 46868 fourierdlem113 46933 pimgtpnf2f 47419 pimiooltgt 47424 |
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