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| Mirrors > Home > MPE Home > Th. List > 0ltpnf | Structured version Visualization version GIF version | ||
| Description: Zero is less than plus infinity. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| 0ltpnf | ⊢ 0 < +∞ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11234 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | ltpnf 13171 | . 2 ⊢ (0 ∈ ℝ → 0 < +∞) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 0 < +∞ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 class class class wbr 5103 ℝcr 11123 0cc0 11124 +∞cpnf 11264 < clt 11267 |
| 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-ext 2732 ax-sep 5251 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-1cn 11182 ax-addrcl 11185 ax-rnegex 11195 ax-cnre 11197 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 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-xp 5661 df-pnf 11269 df-xr 11271 df-ltxr 11272 |
| This theorem is used by: xmulgt0 13335 reltxrnmnf 13395 hashneq0 14428 hashge2el2dif 14545 sgnpnf 15166 pnfnei 23445 0bdop 32474 xlt2addrd 33230 xnn0gt0 33240 xrge0mulc1cn 34451 pnfneige0 34461 lmxrge0 34462 mbfposadd 38416 ftc1anclem5 38446 fourierdlem111 47045 fouriersw 47059 |
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