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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 11303 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | ltpnf 13242 | . 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 11192 0cc0 11193 +∞cpnf 11333 < clt 11336 |
| 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 2733 ax-sep 5249 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-1cn 11251 ax-addrcl 11254 ax-rnegex 11264 ax-cnre 11266 |
| 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 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 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 5657 df-pnf 11338 df-xr 11340 df-ltxr 11341 |
| This theorem is used by: xmulgt0 13406 reltxrnmnf 13466 hashneq0 14501 hashge2el2dif 14618 sgnpnf 15239 pnfnei 23531 0bdop 32588 xlt2addrd 33344 xnn0gt0 33354 xrge0mulc1cn 34566 pnfneige0 34576 lmxrge0 34577 mbfposadd 38565 ftc1anclem5 38595 fourierdlem111 47196 fouriersw 47210 |
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