![]() |
Mathbox for Ender Ting |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > Mathboxes > et-ltneverrefl | Structured version Visualization version GIF version |
Description: Less-than class is never reflexive. (Contributed by Ender Ting, 22-Nov-2024.) Prefer to specify theorem domain and then apply ltnri 11368. (New usage is discouraged.) |
Ref | Expression |
---|---|
et-ltneverrefl | ⊢ ¬ 𝐴 < 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xrltnr 13159 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ 𝐴 < 𝐴) | |
2 | opelxp1 5731 | . . . . 5 ⊢ (〈𝐴, 𝐴〉 ∈ (ℝ* × ℝ*) → 𝐴 ∈ ℝ*) | |
3 | 2 | con3i 154 | . . . 4 ⊢ (¬ 𝐴 ∈ ℝ* → ¬ 〈𝐴, 𝐴〉 ∈ (ℝ* × ℝ*)) |
4 | ltrelxr 11320 | . . . . 5 ⊢ < ⊆ (ℝ* × ℝ*) | |
5 | 4 | sseli 3991 | . . . 4 ⊢ (〈𝐴, 𝐴〉 ∈ < → 〈𝐴, 𝐴〉 ∈ (ℝ* × ℝ*)) |
6 | 3, 5 | nsyl 140 | . . 3 ⊢ (¬ 𝐴 ∈ ℝ* → ¬ 〈𝐴, 𝐴〉 ∈ < ) |
7 | df-br 5149 | . . 3 ⊢ (𝐴 < 𝐴 ↔ 〈𝐴, 𝐴〉 ∈ < ) | |
8 | 6, 7 | sylnibr 329 | . 2 ⊢ (¬ 𝐴 ∈ ℝ* → ¬ 𝐴 < 𝐴) |
9 | 1, 8 | pm2.61i 182 | 1 ⊢ ¬ 𝐴 < 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ∈ wcel 2106 〈cop 4637 class class class wbr 5148 × cxp 5687 ℝ*cxr 11292 < clt 11293 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 ax-cnex 11209 ax-resscn 11210 ax-pre-lttri 11227 ax-pre-lttrn 11228 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-po 5597 df-so 5598 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-er 8744 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11295 df-mnf 11296 df-xr 11297 df-ltxr 11298 |
This theorem is referenced by: tworepnotupword 46840 |
Copyright terms: Public domain | W3C validator |