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Theorem mins2 27754
Description: The minimum of two surreals is less than or equal to the second. (Contributed by Scott Fenton, 14-Feb-2025.)
Assertion
Ref Expression
mins2 (𝐵 No → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵)

Proof of Theorem mins2
StepHypRef Expression
1 lesid 27749 . . 3 (𝐵 No 𝐵 ≤s 𝐵)
2 iffalse 4463 . . . 4 𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) = 𝐵)
32breq1d 5082 . . 3 𝐴 ≤s 𝐵 → (if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵𝐵 ≤s 𝐵))
41, 3syl5ibrcom 248 . 2 (𝐵 No → (¬ 𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵))
5 iftrue 4460 . . 3 (𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) = 𝐴)
6 id 22 . . 3 (𝐴 ≤s 𝐵𝐴 ≤s 𝐵)
75, 6eqbrtrd 5094 . 2 (𝐴 ≤s 𝐵 → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵)
84, 7pm2.61d2 182 1 (𝐵 No → if(𝐴 ≤s 𝐵, 𝐴, 𝐵) ≤s 𝐵)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wcel 2119  ifcif 4454   class class class wbr 5072   No csur 27621   ≤s cles 27726
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-sep 5218  ax-nul 5228  ax-pr 5362
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3or 1093  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ne 2935  df-ral 3054  df-rex 3064  df-rab 3392  df-v 3433  df-sbc 3724  df-csb 3832  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3903  df-nul 4262  df-if 4455  df-pw 4531  df-sn 4556  df-pr 4558  df-tp 4560  df-op 4562  df-uni 4839  df-br 5073  df-opab 5135  df-mpt 5154  df-tr 5180  df-id 5513  df-eprel 5518  df-po 5526  df-so 5527  df-fr 5571  df-we 5573  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-rn 5629  df-res 5630  df-ima 5631  df-ord 6313  df-on 6314  df-suc 6316  df-iota 6441  df-fun 6487  df-fn 6488  df-f 6489  df-fv 6493  df-1o 8395  df-2o 8396  df-no 27624  df-lts 27625  df-les 27727
This theorem is referenced by: (None)
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