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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 6925 | . . . 4 ⊢ (𝑦 = 𝐴 → ( O ‘( bday ‘𝑦)) = ( O ‘( bday ‘𝐴))) | |
2 | breq2 5170 | . . . 4 ⊢ (𝑦 = 𝐴 → (𝑥 <s 𝑦 ↔ 𝑥 <s 𝐴)) | |
3 | 1, 2 | rabeqbidv 3462 | . . 3 ⊢ (𝑦 = 𝐴 → {𝑥 ∈ ( O ‘( bday ‘𝑦)) ∣ 𝑥 <s 𝑦} = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴}) |
4 | df-left 27907 | . . 3 ⊢ L = (𝑦 ∈ No ↦ {𝑥 ∈ ( O ‘( bday ‘𝑦)) ∣ 𝑥 <s 𝑦}) | |
5 | fvex 6933 | . . . 4 ⊢ ( O ‘( bday ‘𝐴)) ∈ V | |
6 | 5 | rabex 5357 | . . 3 ⊢ {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} ∈ V |
7 | 3, 4, 6 | fvmpt 7029 | . 2 ⊢ (𝐴 ∈ No → ( L ‘𝐴) = {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴}) |
8 | 4 | fvmptndm 7060 | . . 3 ⊢ (¬ 𝐴 ∈ No → ( L ‘𝐴) = ∅) |
9 | bdaydm 27837 | . . . . . . . . 9 ⊢ dom bday = No | |
10 | 9 | eleq2i 2836 | . . . . . . . 8 ⊢ (𝐴 ∈ dom bday ↔ 𝐴 ∈ No ) |
11 | ndmfv 6955 | . . . . . . . 8 ⊢ (¬ 𝐴 ∈ dom bday → ( bday ‘𝐴) = ∅) | |
12 | 10, 11 | sylnbir 331 | . . . . . . 7 ⊢ (¬ 𝐴 ∈ No → ( bday ‘𝐴) = ∅) |
13 | 12 | fveq2d 6924 | . . . . . 6 ⊢ (¬ 𝐴 ∈ No → ( O ‘( bday ‘𝐴)) = ( O ‘∅)) |
14 | old0 27916 | . . . . . 6 ⊢ ( O ‘∅) = ∅ | |
15 | 13, 14 | eqtrdi 2796 | . . . . 5 ⊢ (¬ 𝐴 ∈ No → ( O ‘( bday ‘𝐴)) = ∅) |
16 | 15 | rabeqdv 3459 | . . . 4 ⊢ (¬ 𝐴 ∈ No → {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} = {𝑥 ∈ ∅ ∣ 𝑥 <s 𝐴}) |
17 | rab0 4409 | . . . 4 ⊢ {𝑥 ∈ ∅ ∣ 𝑥 <s 𝐴} = ∅ | |
18 | 16, 17 | eqtrdi 2796 | . . 3 ⊢ (¬ 𝐴 ∈ No → {𝑥 ∈ ( O ‘( bday ‘𝐴)) ∣ 𝑥 <s 𝐴} = ∅) |
19 | 8, 18 | eqtr4d 2783 | . 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 1537 ∈ wcel 2108 {crab 3443 ∅c0 4352 class class class wbr 5166 dom cdm 5700 ‘cfv 6573 No csur 27702 <s cslt 27703 bday cbday 27704 O cold 27900 L cleft 27902 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-ral 3068 df-rex 3077 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-ov 7451 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-1o 8522 df-no 27705 df-bday 27707 df-made 27904 df-old 27905 df-left 27907 |
This theorem is referenced by: ssltleft 27927 leftssold 27935 left1s 27951 lrold 27953 madebdaylemlrcut 27955 sltlpss 27963 0elleft 27966 cofcutr 27976 cofcutrtime 27979 addsproplem2 28021 addsproplem4 28023 addsproplem6 28025 sleadd1 28040 negsproplem4 28081 negsproplem6 28083 negsid 28091 mulsproplem12 28171 precsexlem9 28257 sltonold 28301 |
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