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Mirrors > Home > MPE Home > Th. List > Mathboxes > ssltdisj | Structured version Visualization version GIF version |
Description: If 𝐴 preceeds 𝐵, then 𝐴 and 𝐵 are disjoint. (Contributed by Scott Fenton, 18-Sep-2024.) |
Ref | Expression |
---|---|
ssltdisj | ⊢ (𝐴 <<s 𝐵 → (𝐴 ∩ 𝐵) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssltss1 33669 | . . . . . 6 ⊢ (𝐴 <<s 𝐵 → 𝐴 ⊆ No ) | |
2 | 1 | sselda 3887 | . . . . 5 ⊢ ((𝐴 <<s 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ No ) |
3 | sltirr 33635 | . . . . 5 ⊢ (𝑥 ∈ No → ¬ 𝑥 <s 𝑥) | |
4 | 2, 3 | syl 17 | . . . 4 ⊢ ((𝐴 <<s 𝐵 ∧ 𝑥 ∈ 𝐴) → ¬ 𝑥 <s 𝑥) |
5 | ssltsepc 33673 | . . . . 5 ⊢ ((𝐴 <<s 𝐵 ∧ 𝑥 ∈ 𝐴 ∧ 𝑥 ∈ 𝐵) → 𝑥 <s 𝑥) | |
6 | 5 | 3expa 1120 | . . . 4 ⊢ (((𝐴 <<s 𝐵 ∧ 𝑥 ∈ 𝐴) ∧ 𝑥 ∈ 𝐵) → 𝑥 <s 𝑥) |
7 | 4, 6 | mtand 816 | . . 3 ⊢ ((𝐴 <<s 𝐵 ∧ 𝑥 ∈ 𝐴) → ¬ 𝑥 ∈ 𝐵) |
8 | 7 | ralrimiva 3095 | . 2 ⊢ (𝐴 <<s 𝐵 → ∀𝑥 ∈ 𝐴 ¬ 𝑥 ∈ 𝐵) |
9 | disj 4348 | . 2 ⊢ ((𝐴 ∩ 𝐵) = ∅ ↔ ∀𝑥 ∈ 𝐴 ¬ 𝑥 ∈ 𝐵) | |
10 | 8, 9 | sylibr 237 | 1 ⊢ (𝐴 <<s 𝐵 → (𝐴 ∩ 𝐵) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2112 ∀wral 3051 ∩ cin 3852 ∅c0 4223 class class class wbr 5039 No csur 33529 <s cslt 33530 <<s csslt 33661 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 ax-un 7501 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-ord 6194 df-on 6195 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-fv 6366 df-1o 8180 df-2o 8181 df-no 33532 df-slt 33533 df-sslt 33662 |
This theorem is referenced by: sltlpss 33773 |
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