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Mirrors > Home > MPE Home > Th. List > Mathboxes > sltn0 | Structured version Visualization version GIF version |
Description: If 𝑋 is less than 𝑌, then either ( L ‘𝑌) or ( R ‘𝑋) is non-empty. (Contributed by Scott Fenton, 10-Dec-2024.) |
Ref | Expression |
---|---|
sltn0 | ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ∧ 𝑋 <s 𝑌) → (( L ‘𝑌) ≠ ∅ ∨ ( R ‘𝑋) ≠ ∅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lltropt 34035 | . . . . 5 ⊢ (𝑋 ∈ No → ( L ‘𝑋) <<s ( R ‘𝑋)) | |
2 | 1 | adantr 480 | . . . 4 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ) → ( L ‘𝑋) <<s ( R ‘𝑋)) |
3 | lltropt 34035 | . . . . 5 ⊢ (𝑌 ∈ No → ( L ‘𝑌) <<s ( R ‘𝑌)) | |
4 | 3 | adantl 481 | . . . 4 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ) → ( L ‘𝑌) <<s ( R ‘𝑌)) |
5 | lrcut 34062 | . . . . . 6 ⊢ (𝑋 ∈ No → (( L ‘𝑋) |s ( R ‘𝑋)) = 𝑋) | |
6 | 5 | eqcomd 2745 | . . . . 5 ⊢ (𝑋 ∈ No → 𝑋 = (( L ‘𝑋) |s ( R ‘𝑋))) |
7 | 6 | adantr 480 | . . . 4 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ) → 𝑋 = (( L ‘𝑋) |s ( R ‘𝑋))) |
8 | lrcut 34062 | . . . . . 6 ⊢ (𝑌 ∈ No → (( L ‘𝑌) |s ( R ‘𝑌)) = 𝑌) | |
9 | 8 | eqcomd 2745 | . . . . 5 ⊢ (𝑌 ∈ No → 𝑌 = (( L ‘𝑌) |s ( R ‘𝑌))) |
10 | 9 | adantl 481 | . . . 4 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ) → 𝑌 = (( L ‘𝑌) |s ( R ‘𝑌))) |
11 | sltrec 33993 | . . . 4 ⊢ (((( L ‘𝑋) <<s ( R ‘𝑋) ∧ ( L ‘𝑌) <<s ( R ‘𝑌)) ∧ (𝑋 = (( L ‘𝑋) |s ( R ‘𝑋)) ∧ 𝑌 = (( L ‘𝑌) |s ( R ‘𝑌)))) → (𝑋 <s 𝑌 ↔ (∃𝑦 ∈ ( L ‘𝑌)𝑋 ≤s 𝑦 ∨ ∃𝑥 ∈ ( R ‘𝑋)𝑥 ≤s 𝑌))) | |
12 | 2, 4, 7, 10, 11 | syl22anc 835 | . . 3 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ) → (𝑋 <s 𝑌 ↔ (∃𝑦 ∈ ( L ‘𝑌)𝑋 ≤s 𝑦 ∨ ∃𝑥 ∈ ( R ‘𝑋)𝑥 ≤s 𝑌))) |
13 | 12 | biimp3a 1467 | . 2 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ∧ 𝑋 <s 𝑌) → (∃𝑦 ∈ ( L ‘𝑌)𝑋 ≤s 𝑦 ∨ ∃𝑥 ∈ ( R ‘𝑋)𝑥 ≤s 𝑌)) |
14 | rexn0 4446 | . . 3 ⊢ (∃𝑦 ∈ ( L ‘𝑌)𝑋 ≤s 𝑦 → ( L ‘𝑌) ≠ ∅) | |
15 | rexn0 4446 | . . 3 ⊢ (∃𝑥 ∈ ( R ‘𝑋)𝑥 ≤s 𝑌 → ( R ‘𝑋) ≠ ∅) | |
16 | 14, 15 | orim12i 905 | . 2 ⊢ ((∃𝑦 ∈ ( L ‘𝑌)𝑋 ≤s 𝑦 ∨ ∃𝑥 ∈ ( R ‘𝑋)𝑥 ≤s 𝑌) → (( L ‘𝑌) ≠ ∅ ∨ ( R ‘𝑋) ≠ ∅)) |
17 | 13, 16 | syl 17 | 1 ⊢ ((𝑋 ∈ No ∧ 𝑌 ∈ No ∧ 𝑋 <s 𝑌) → (( L ‘𝑌) ≠ ∅ ∨ ( R ‘𝑋) ≠ ∅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∨ wo 843 ∧ w3a 1085 = wceq 1541 ∈ wcel 2109 ≠ wne 2944 ∃wrex 3066 ∅c0 4261 class class class wbr 5078 ‘cfv 6430 (class class class)co 7268 No csur 33822 <s cslt 33823 ≤s csle 33926 <<s csslt 33954 |s cscut 33956 L cleft 34008 R cright 34009 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-int 4885 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-1o 8281 df-2o 8282 df-no 33825 df-slt 33826 df-bday 33827 df-sle 33927 df-sslt 33955 df-scut 33957 df-made 34010 df-old 34011 df-left 34013 df-right 34014 |
This theorem is referenced by: (None) |
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