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| Mirrors > Home > MPE Home > Th. List > slesubsub3bd | Structured version Visualization version GIF version | ||
| Description: Equivalence for the surreal less-than or equal relationship between differences. (Contributed by Scott Fenton, 7-Mar-2025.) |
| Ref | Expression |
|---|---|
| sltsubsubbd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| sltsubsubbd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| sltsubsubbd.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| sltsubsubbd.4 | ⊢ (𝜑 → 𝐷 ∈ No ) |
| Ref | Expression |
|---|---|
| slesubsub3bd | ⊢ (𝜑 → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ (𝐷 -s 𝐶) ≤s (𝐵 -s 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sltsubsubbd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 2 | sltsubsubbd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 3 | sltsubsubbd.4 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ No ) | |
| 4 | sltsubsubbd.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 5 | 1, 2, 3, 4 | sltsubsubbd 28016 | . . 3 ⊢ (𝜑 → ((𝐵 -s 𝐷) <s (𝐴 -s 𝐶) ↔ (𝐵 -s 𝐴) <s (𝐷 -s 𝐶))) |
| 6 | 5 | notbid 318 | . 2 ⊢ (𝜑 → (¬ (𝐵 -s 𝐷) <s (𝐴 -s 𝐶) ↔ ¬ (𝐵 -s 𝐴) <s (𝐷 -s 𝐶))) |
| 7 | 2, 4 | subscld 27996 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) ∈ No ) |
| 8 | 1, 3 | subscld 27996 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐷) ∈ No ) |
| 9 | slenlt 27684 | . . 3 ⊢ (((𝐴 -s 𝐶) ∈ No ∧ (𝐵 -s 𝐷) ∈ No ) → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ ¬ (𝐵 -s 𝐷) <s (𝐴 -s 𝐶))) | |
| 10 | 7, 8, 9 | syl2anc 584 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ ¬ (𝐵 -s 𝐷) <s (𝐴 -s 𝐶))) |
| 11 | 3, 4 | subscld 27996 | . . 3 ⊢ (𝜑 → (𝐷 -s 𝐶) ∈ No ) |
| 12 | 1, 2 | subscld 27996 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐴) ∈ No ) |
| 13 | slenlt 27684 | . . 3 ⊢ (((𝐷 -s 𝐶) ∈ No ∧ (𝐵 -s 𝐴) ∈ No ) → ((𝐷 -s 𝐶) ≤s (𝐵 -s 𝐴) ↔ ¬ (𝐵 -s 𝐴) <s (𝐷 -s 𝐶))) | |
| 14 | 11, 12, 13 | syl2anc 584 | . 2 ⊢ (𝜑 → ((𝐷 -s 𝐶) ≤s (𝐵 -s 𝐴) ↔ ¬ (𝐵 -s 𝐴) <s (𝐷 -s 𝐶))) |
| 15 | 6, 10, 14 | 3bitr4d 311 | 1 ⊢ (𝜑 → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ (𝐷 -s 𝐶) ≤s (𝐵 -s 𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∈ wcel 2110 class class class wbr 5089 (class class class)co 7341 No csur 27571 <s cslt 27572 ≤s csle 27676 -s csubs 27955 |
| 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 1968 ax-7 2009 ax-8 2112 ax-9 2120 ax-10 2143 ax-11 2159 ax-12 2179 ax-ext 2702 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7663 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-rmo 3344 df-reu 3345 df-rab 3394 df-v 3436 df-sbc 3740 df-csb 3849 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-pss 3920 df-nul 4282 df-if 4474 df-pw 4550 df-sn 4575 df-pr 4577 df-tp 4579 df-op 4581 df-ot 4583 df-uni 4858 df-int 4896 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-se 5568 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6244 df-ord 6305 df-on 6306 df-suc 6308 df-iota 6433 df-fun 6479 df-fn 6480 df-f 6481 df-f1 6482 df-fo 6483 df-f1o 6484 df-fv 6485 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-1st 7916 df-2nd 7917 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-1o 8380 df-2o 8381 df-nadd 8576 df-no 27574 df-slt 27575 df-bday 27576 df-sle 27677 df-sslt 27714 df-scut 27716 df-0s 27761 df-made 27781 df-old 27782 df-left 27784 df-right 27785 df-norec 27874 df-norec2 27885 df-adds 27896 df-negs 27956 df-subs 27957 |
| This theorem is referenced by: mulsuniflem 28081 |
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