Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > intv | GIF version |
Description: The intersection of the universal class is empty. (Contributed by NM, 11-Sep-2008.) |
Ref | Expression |
---|---|
intv | ⊢ ∩ V = ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0ex 4125 | . 2 ⊢ ∅ ∈ V | |
2 | int0el 3870 | . 2 ⊢ (∅ ∈ V → ∩ V = ∅) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ ∩ V = ∅ |
Colors of variables: wff set class |
Syntax hints: = wceq 1353 ∈ wcel 2146 Vcvv 2735 ∅c0 3420 ∩ cint 3840 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-ext 2157 ax-nul 4124 |
This theorem depends on definitions: df-bi 117 df-tru 1356 df-nf 1459 df-sb 1761 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-v 2737 df-dif 3129 df-in 3133 df-ss 3140 df-nul 3421 df-int 3841 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |