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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ex-gt | Structured version Visualization version GIF version | ||
| Description: Simple example of >, in this case, 0 is not greater than 0. This is useful as an example, and helps us gain confidence that we've correctly defined the symbol. (Contributed by David A. Wheeler, 1-Jan-2017.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| ex-gt | ⊢ ¬ 0 > 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11176 | . . 3 ⊢ 0 ∈ ℝ | |
| 2 | 1 | ltnri 11285 | . 2 ⊢ ¬ 0 < 0 |
| 3 | c0ex 11166 | . . 3 ⊢ 0 ∈ V | |
| 4 | 3, 3 | gt-lth 50308 | . 2 ⊢ (0 > 0 ↔ 0 < 0) |
| 5 | 2, 4 | mtbir 325 | 1 ⊢ ¬ 0 > 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 class class class wbr 5097 0cc0 11066 < clt 11209 > cgt 50302 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-resscn 11123 ax-1cn 11124 ax-icn 11125 ax-addcl 11126 ax-addrcl 11127 ax-mulcl 11128 ax-i2m1 11134 ax-rnegex 11137 ax-cnre 11139 ax-pre-lttri 11140 ax-pre-lttrn 11141 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-po 5551 df-so 5552 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-er 8671 df-en 8921 df-dom 8922 df-sdom 8923 df-pnf 11211 df-mnf 11212 df-ltxr 11214 df-gt 50304 |
| This theorem is referenced by: (None) |
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