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Mirrors > Home > MPE Home > Th. List > ressbasssg | Structured version Visualization version GIF version |
Description: The base set of a restriction to 𝐴 is a subset of 𝐴 and the base set 𝐵 of the original structure. (Contributed by SN, 10-Jan-2025.) |
Ref | Expression |
---|---|
ressbas.r | ⊢ 𝑅 = (𝑊 ↾s 𝐴) |
ressbas.b | ⊢ 𝐵 = (Base‘𝑊) |
Ref | Expression |
---|---|
ressbasssg | ⊢ (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ressbas.r | . . . 4 ⊢ 𝑅 = (𝑊 ↾s 𝐴) | |
2 | ressbas.b | . . . 4 ⊢ 𝐵 = (Base‘𝑊) | |
3 | 1, 2 | ressbas 17178 | . . 3 ⊢ (𝐴 ∈ V → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
4 | ssid 4004 | . . 3 ⊢ (𝐴 ∩ 𝐵) ⊆ (𝐴 ∩ 𝐵) | |
5 | 3, 4 | eqsstrrdi 4037 | . 2 ⊢ (𝐴 ∈ V → (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵)) |
6 | reldmress 17174 | . . . . . 6 ⊢ Rel dom ↾s | |
7 | 6 | ovprc2 7448 | . . . . 5 ⊢ (¬ 𝐴 ∈ V → (𝑊 ↾s 𝐴) = ∅) |
8 | 1, 7 | eqtrid 2784 | . . . 4 ⊢ (¬ 𝐴 ∈ V → 𝑅 = ∅) |
9 | 8 | fveq2d 6895 | . . 3 ⊢ (¬ 𝐴 ∈ V → (Base‘𝑅) = (Base‘∅)) |
10 | base0 17148 | . . . 4 ⊢ ∅ = (Base‘∅) | |
11 | 0ss 4396 | . . . 4 ⊢ ∅ ⊆ (𝐴 ∩ 𝐵) | |
12 | 10, 11 | eqsstrri 4017 | . . 3 ⊢ (Base‘∅) ⊆ (𝐴 ∩ 𝐵) |
13 | 9, 12 | eqsstrdi 4036 | . 2 ⊢ (¬ 𝐴 ∈ V → (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵)) |
14 | 5, 13 | pm2.61i 182 | 1 ⊢ (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 = wceq 1541 ∈ wcel 2106 Vcvv 3474 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 ‘cfv 6543 (class class class)co 7408 Basecbs 17143 ↾s cress 17172 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-1cn 11167 ax-addcl 11169 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7855 df-2nd 7975 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-nn 12212 df-sets 17096 df-slot 17114 df-ndx 17126 df-base 17144 df-ress 17173 |
This theorem is referenced by: ressbasss 17182 ressbasss2 17184 |
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