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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 11225 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | ltpnf 13161 | . 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 2146 class class class wbr 5111 ℝcr 11114 0cc0 11115 +∞cpnf 11255 < clt 11258 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11171 ax-1cn 11173 ax-addrcl 11176 ax-rnegex 11186 ax-cnre 11188 |
| 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 2744 df-cleq 2757 df-clel 2840 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-xp 5669 df-pnf 11260 df-xr 11262 df-ltxr 11263 |
| This theorem is used by: xmulgt0 13325 reltxrnmnf 13385 hashneq0 14418 hashge2el2dif 14535 sgnpnf 15154 pnfnei 23427 0bdop 32416 xlt2addrd 33174 xnn0gt0 33184 xrge0mulc1cn 34395 pnfneige0 34405 lmxrge0 34406 mbfposadd 38375 ftc1anclem5 38405 fourierdlem111 46989 fouriersw 47003 |
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