| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > 0ov | Structured version Visualization version GIF version | ||
| Description: Operation value of the empty set. (Contributed by AV, 15-May-2021.) |
| Ref | Expression |
|---|---|
| 0ov | ⊢ (𝐴∅𝐵) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ov 7420 | . 2 ⊢ (𝐴∅𝐵) = (∅‘〈𝐴, 𝐵〉) | |
| 2 | 0fv 6923 | . 2 ⊢ (∅‘〈𝐴, 𝐵〉) = ∅ | |
| 3 | 1, 2 | eqtri 2785 | 1 ⊢ (𝐴∅𝐵) = ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∅c0 4282 〈cop 4593 ‘cfv 6537 (class class class)co 7417 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-nul 5267 ax-pr 5402 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-dm 5669 df-iota 6493 df-fv 6545 df-ov 7420 |
| This theorem is used by: csbov 7462 2mpo0 7667 el2mpocsbcl 8086 homarcl 18123 oppglsm 19775 iswwlksnon 30329 iswspthsnon 30332 mclsrcl 36148 oppcup3 50143 indthinc 50396 indthincALT 50397 prsthinc 50398 lanrcl 50555 ranrcl 50556 rellan 50557 relran 50558 |
| Copyright terms: Public domain | W3C validator |