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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 11310 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | ltpnf 13249 | . 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 2144 class class class wbr 5102 ℝcr 11199 0cc0 11200 +∞cpnf 11340 < clt 11343 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11256 ax-1cn 11258 ax-addrcl 11261 ax-rnegex 11271 ax-cnre 11273 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-xp 5656 df-pnf 11345 df-xr 11347 df-ltxr 11348 |
| This theorem is used by: xmulgt0 13413 reltxrnmnf 13473 hashneq0 14508 hashge2el2dif 14625 sgnpnf 15246 pnfnei 23538 0bdop 32595 xlt2addrd 33351 xnn0gt0 33361 xrge0mulc1cn 34573 pnfneige0 34583 lmxrge0 34584 mbfposadd 38586 ftc1anclem5 38616 fourierdlem111 47227 fouriersw 47241 |
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