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Mirrors > Home > MPE Home > Th. List > leftval | Structured version Visualization version GIF version |
Description: The value of the left options function. (Contributed by Scott Fenton, 9-Oct-2024.) |
Ref | Expression |
---|---|
leftval | ⊢ ( L ‘𝐴) = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2fveq3 6889 | . . . 4 ⊢ (𝑦 = 𝐴 → ( O ‘( bday ‘𝑦)) = ( O ‘( bday ‘𝐴))) | |
2 | breq2 5145 | . . . 4 ⊢ (𝑦 = 𝐴 → (𝑥 <s 𝑦 ↔ 𝑥 <s 𝐴)) | |
3 | 1, 2 | rabeqbidv 3443 | . . 3 ⊢ (𝑦 = 𝐴 → {𝑥 ∈ ( O ‘( bday ‘𝑦)) ∣ 𝑥 <s 𝑦} = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴}) |
4 | df-left 27727 | . . 3 ⊢ L = (𝑦 ∈ No ↦ {𝑥 ∈ ( O ‘( bday ‘𝑦)) ∣ 𝑥 <s 𝑦}) | |
5 | fvex 6897 | . . . 4 ⊢ ( O ‘( bday ‘𝐴)) ∈ V | |
6 | 5 | rabex 5325 | . . 3 ⊢ {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} ∈ V |
7 | 3, 4, 6 | fvmpt 6991 | . 2 ⊢ (𝐴 ∈ No → ( L ‘𝐴) = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴}) |
8 | 4 | fvmptndm 7021 | . . 3 ⊢ (¬ 𝐴 ∈ No → ( L ‘𝐴) = ∅) |
9 | bdaydm 27657 | . . . . . . . . 9 ⊢ dom bday = No | |
10 | 9 | eleq2i 2819 | . . . . . . . 8 ⊢ (𝐴 ∈ dom bday ↔ 𝐴 ∈ No ) |
11 | ndmfv 6919 | . . . . . . . 8 ⊢ (¬ 𝐴 ∈ dom bday → ( bday ‘𝐴) = ∅) | |
12 | 10, 11 | sylnbir 331 | . . . . . . 7 ⊢ (¬ 𝐴 ∈ No → ( bday ‘𝐴) = ∅) |
13 | 12 | fveq2d 6888 | . . . . . 6 ⊢ (¬ 𝐴 ∈ No → ( O ‘( bday ‘𝐴)) = ( O ‘∅)) |
14 | old0 27736 | . . . . . 6 ⊢ ( O ‘∅) = ∅ | |
15 | 13, 14 | eqtrdi 2782 | . . . . 5 ⊢ (¬ 𝐴 ∈ No → ( O ‘( bday ‘𝐴)) = ∅) |
16 | 15 | rabeqdv 3441 | . . . 4 ⊢ (¬ 𝐴 ∈ No → {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} = {𝑥 ∈ ∅ ∣ 𝑥 <s 𝐴}) |
17 | rab0 4377 | . . . 4 ⊢ {𝑥 ∈ ∅ ∣ 𝑥 <s 𝐴} = ∅ | |
18 | 16, 17 | eqtrdi 2782 | . . 3 ⊢ (¬ 𝐴 ∈ No → {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} = ∅) |
19 | 8, 18 | eqtr4d 2769 | . 2 ⊢ (¬ 𝐴 ∈ No → ( L ‘𝐴) = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴}) |
20 | 7, 19 | pm2.61i 182 | 1 ⊢ ( L ‘𝐴) = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 = wceq 1533 ∈ wcel 2098 {crab 3426 ∅c0 4317 class class class wbr 5141 dom cdm 5669 ‘cfv 6536 No csur 27523 <s cslt 27524 bday cbday 27525 O cold 27720 L cleft 27722 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pr 5420 ax-un 7721 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7407 df-2nd 7972 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-1o 8464 df-no 27526 df-bday 27528 df-made 27724 df-old 27725 df-left 27727 |
This theorem is referenced by: ssltleft 27747 leftssold 27755 left1s 27771 lrold 27773 madebdaylemlrcut 27775 sltlpss 27783 0elleft 27786 cofcutr 27794 cofcutrtime 27797 addsproplem2 27837 addsproplem4 27839 addsproplem6 27841 sleadd1 27856 negsproplem4 27893 negsproplem6 27895 negsid 27903 mulsproplem12 27977 precsexlem9 28063 sltonold 28103 |
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