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| Mirrors > Home > MPE Home > Th. List > leadds1im | Structured version Visualization version GIF version | ||
| Description: Surreal less-than or equal cancels under addition. (Contributed by Scott Fenton, 21-Jan-2025.) |
| Ref | Expression |
|---|---|
| leadds1im | ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → ((𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶) → 𝐴 ≤s 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltadds1im 28159 | . . . 4 ⊢ ((𝐵 ∈ No ∧ 𝐴 ∈ No ∧ 𝐶 ∈ No ) → (𝐵 <s 𝐴 → (𝐵 +s 𝐶) <s (𝐴 +s 𝐶))) | |
| 2 | 1 | 3com12 1141 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → (𝐵 <s 𝐴 → (𝐵 +s 𝐶) <s (𝐴 +s 𝐶))) |
| 3 | ltnles 27898 | . . . . 5 ⊢ ((𝐵 ∈ No ∧ 𝐴 ∈ No ) → (𝐵 <s 𝐴 ↔ ¬ 𝐴 ≤s 𝐵)) | |
| 4 | 3 | ancoms 463 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐵 <s 𝐴 ↔ ¬ 𝐴 ≤s 𝐵)) |
| 5 | 4 | 3adant3 1150 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → (𝐵 <s 𝐴 ↔ ¬ 𝐴 ≤s 𝐵)) |
| 6 | addscl 28155 | . . . . 5 ⊢ ((𝐵 ∈ No ∧ 𝐶 ∈ No ) → (𝐵 +s 𝐶) ∈ No ) | |
| 7 | 6 | 3adant1 1148 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → (𝐵 +s 𝐶) ∈ No ) |
| 8 | addscl 28155 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐶 ∈ No ) → (𝐴 +s 𝐶) ∈ No ) | |
| 9 | ltnles 27898 | . . . 4 ⊢ (((𝐵 +s 𝐶) ∈ No ∧ (𝐴 +s 𝐶) ∈ No ) → ((𝐵 +s 𝐶) <s (𝐴 +s 𝐶) ↔ ¬ (𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶))) | |
| 10 | 7, 8, 9 | 3imp3i2an 1364 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → ((𝐵 +s 𝐶) <s (𝐴 +s 𝐶) ↔ ¬ (𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶))) |
| 11 | 2, 5, 10 | 3imtr3d 296 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → (¬ 𝐴 ≤s 𝐵 → ¬ (𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶))) |
| 12 | 11 | con4d 116 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → ((𝐴 +s 𝐶) ≤s (𝐵 +s 𝐶) → 𝐴 ≤s 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ w3a 1103 ∈ wcel 2143 class class class wbr 5110 (class class class)co 7412 No csur 27785 <s clts 27786 ≤s cles 27889 +s cadds 28133 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-tp 4595 df-op 4597 df-uni 4874 df-int 4914 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7987 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-1o 8454 df-2o 8455 df-nadd 8653 df-no 27788 df-lts 27789 df-bday 27790 df-les 27890 df-slts 27932 df-cuts 27934 df-0s 27981 df-made 28001 df-old 28002 df-left 28004 df-right 28005 df-norec2 28123 df-adds 28134 |
| This theorem is referenced by: leadds2im 28162 leadds1 28163 |
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