| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 17295 | . . 3 ⊢ (𝐴 ∈ V → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 4 | ssid 3958 | . . 3 ⊢ (𝐴 ∩ 𝐵) ⊆ (𝐴 ∩ 𝐵) | |
| 5 | 3, 4 | eqsstrrdi 3981 | . 2 ⊢ (𝐴 ∈ V → (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵)) |
| 6 | reldmress 17291 | . . . . . 6 ⊢ Rel dom ↾s | |
| 7 | 6 | ovprc2 7450 | . . . . 5 ⊢ (¬ 𝐴 ∈ V → (𝑊 ↾s 𝐴) = ∅) |
| 8 | 1, 7 | eqtrid 2808 | . . . 4 ⊢ (¬ 𝐴 ∈ V → 𝑅 = ∅) |
| 9 | 8 | fveq2d 6885 | . . 3 ⊢ (¬ 𝐴 ∈ V → (Base‘𝑅) = (Base‘∅)) |
| 10 | base0 17273 | . . . 4 ⊢ ∅ = (Base‘∅) | |
| 11 | 0ss 4356 | . . . 4 ⊢ ∅ ⊆ (𝐴 ∩ 𝐵) | |
| 12 | 10, 11 | eqsstrri 3983 | . . 3 ⊢ (Base‘∅) ⊆ (𝐴 ∩ 𝐵) |
| 13 | 9, 12 | eqsstrdi 3980 | . 2 ⊢ (¬ 𝐴 ∈ V → (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵)) |
| 14 | 5, 13 | pm2.61i 184 | 1 ⊢ (Base‘𝑅) ⊆ (𝐴 ∩ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 = wceq 1568 ∈ wcel 2141 Vcvv 3453 ∩ cin 3903 ⊆ wss 3904 ∅c0 4285 ‘cfv 6536 (class class class)co 7410 Basecbs 17268 ↾s cress 17289 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5256 ax-nul 5268 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11155 ax-1cn 11157 ax-addcl 11159 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2095 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7862 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-nn 12233 df-sets 17223 df-slot 17241 df-ndx 17253 df-base 17269 df-ress 17290 |
| This theorem is referenced by: ressbasss 17298 ressbasss2 17300 unitscyglem5 42912 |
| Copyright terms: Public domain | W3C validator |