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| Mirrors > Home > MPE Home > Th. List > mins2 | Structured version Visualization version GIF version | ||
| Description: The minimum of two surreals is less than or equal to the second. (Contributed by Scott Fenton, 14-Feb-2025.) |
| Ref | Expression |
|---|---|
| mins2 | ⊢ (𝐵 ∈ No → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lesid 27748 | . . 3 ⊢ (𝐵 ∈ No → 𝐵 ≤s 𝐵) | |
| 2 | iffalse 4476 | . . . 4 ⊢ (¬ 𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) = 𝐵) | |
| 3 | 2 | breq1d 5096 | . . 3 ⊢ (¬ 𝐴 ≤s 𝐵 → (if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵 ↔ 𝐵 ≤s 𝐵)) |
| 4 | 1, 3 | syl5ibrcom 247 | . 2 ⊢ (𝐵 ∈ No → (¬ 𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵)) |
| 5 | iftrue 4473 | . . 3 ⊢ (𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) = 𝐴) | |
| 6 | id 22 | . . 3 ⊢ (𝐴 ≤s 𝐵 → 𝐴 ≤s 𝐵) | |
| 7 | 5, 6 | eqbrtrd 5108 | . 2 ⊢ (𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵) |
| 8 | 4, 7 | pm2.61d2 181 | 1 ⊢ (𝐵 ∈ No → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∈ wcel 2114 ifcif 4467 class class class wbr 5086 No csur 27620 ≤s cles 27725 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pr 5371 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-ord 6321 df-on 6322 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-fv 6501 df-1o 8399 df-2o 8400 df-no 27623 df-lts 27624 df-les 27726 |
| This theorem is referenced by: (None) |
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