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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 11317 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | ltpnf 13256 | . 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 11206 0cc0 11207 +∞cpnf 11347 < clt 11350 |
| 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 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-1cn 11265 ax-addrcl 11268 ax-rnegex 11278 ax-cnre 11280 |
| 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 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-xp 5657 df-pnf 11352 df-xr 11354 df-ltxr 11355 |
| This theorem is used by: xmulgt0 13420 reltxrnmnf 13480 hashneq0 14515 hashge2el2dif 14632 sgnpnf 15255 pnfnei 23547 0bdop 32604 xlt2addrd 33401 xnn0gt0 33411 xrge0mulc1cn 34623 pnfneige0 34633 lmxrge0 34634 mbfposadd 38694 ftc1anclem5 38724 fourierdlem111 47335 fouriersw 47349 |
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