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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 7434 | . 2 ⊢ (𝐴∅𝐵) = (∅‘〈𝐴, 𝐵〉) | |
2 | 0fv 6951 | . 2 ⊢ (∅‘〈𝐴, 𝐵〉) = ∅ | |
3 | 1, 2 | eqtri 2763 | 1 ⊢ (𝐴∅𝐵) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∅c0 4339 〈cop 4637 ‘cfv 6563 (class class class)co 7431 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-nul 5312 ax-pr 5438 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-dif 3966 df-un 3968 df-ss 3980 df-nul 4340 df-if 4532 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-dm 5699 df-iota 6516 df-fv 6571 df-ov 7434 |
This theorem is referenced by: csbov 7476 2mpo0 7682 el2mpocsbcl 8109 homarcl 18082 oppglsm 19675 iswwlksnon 29883 iswspthsnon 29886 mclsrcl 35546 indthinc 48853 indthincALT 48854 prsthinc 48855 |
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