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Mirrors > Home > MPE Home > Th. List > Mathboxes > nomaxmo | Structured version Visualization version GIF version |
Description: A class of surreals has at most one maximum. (Contributed by Scott Fenton, 5-Dec-2021.) |
Ref | Expression |
---|---|
nomaxmo | ⊢ (𝑆 ⊆ No → ∃*𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 ¬ 𝑥 <s 𝑦) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sltso 33181 | . . . . 5 ⊢ <s Or No | |
2 | soss 5493 | . . . . 5 ⊢ (𝑆 ⊆ No → ( <s Or No → <s Or 𝑆)) | |
3 | 1, 2 | mpi 20 | . . . 4 ⊢ (𝑆 ⊆ No → <s Or 𝑆) |
4 | cnvso 6139 | . . . 4 ⊢ ( <s Or 𝑆 ↔ ◡ <s Or 𝑆) | |
5 | 3, 4 | sylib 220 | . . 3 ⊢ (𝑆 ⊆ No → ◡ <s Or 𝑆) |
6 | somo 5510 | . . 3 ⊢ (◡ <s Or 𝑆 → ∃*𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 ¬ 𝑦◡ <s 𝑥) | |
7 | 5, 6 | syl 17 | . 2 ⊢ (𝑆 ⊆ No → ∃*𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 ¬ 𝑦◡ <s 𝑥) |
8 | vex 3497 | . . . . . 6 ⊢ 𝑦 ∈ V | |
9 | vex 3497 | . . . . . 6 ⊢ 𝑥 ∈ V | |
10 | 8, 9 | brcnv 5753 | . . . . 5 ⊢ (𝑦◡ <s 𝑥 ↔ 𝑥 <s 𝑦) |
11 | 10 | notbii 322 | . . . 4 ⊢ (¬ 𝑦◡ <s 𝑥 ↔ ¬ 𝑥 <s 𝑦) |
12 | 11 | ralbii 3165 | . . 3 ⊢ (∀𝑦 ∈ 𝑆 ¬ 𝑦◡ <s 𝑥 ↔ ∀𝑦 ∈ 𝑆 ¬ 𝑥 <s 𝑦) |
13 | 12 | rmobii 3396 | . 2 ⊢ (∃*𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 ¬ 𝑦◡ <s 𝑥 ↔ ∃*𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 ¬ 𝑥 <s 𝑦) |
14 | 7, 13 | sylib 220 | 1 ⊢ (𝑆 ⊆ No → ∃*𝑥 ∈ 𝑆 ∀𝑦 ∈ 𝑆 ¬ 𝑥 <s 𝑦) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∀wral 3138 ∃*wrmo 3141 ⊆ wss 3936 class class class wbr 5066 Or wor 5473 ◡ccnv 5554 No csur 33147 <s cslt 33148 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-ord 6194 df-on 6195 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-fv 6363 df-1o 8102 df-2o 8103 df-no 33150 df-slt 33151 |
This theorem is referenced by: nosupno 33203 nosupbday 33205 nosupbnd1 33214 nosupbnd2 33216 |
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