![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > df-un | Unicode version |
Description: Define the union of two
classes. Definition 5.6 of [TakeutiZaring]
p. 16. Contrast this operation with difference ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Ref | Expression |
---|---|
df-un |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cA |
. . 3
![]() ![]() | |
2 | cB |
. . 3
![]() ![]() | |
3 | 1, 2 | cun 3127 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() |
4 | vx |
. . . . . 6
![]() ![]() | |
5 | 4 | cv 1352 |
. . . . 5
![]() ![]() |
6 | 5, 1 | wcel 2148 |
. . . 4
![]() ![]() ![]() ![]() |
7 | 5, 2 | wcel 2148 |
. . . 4
![]() ![]() ![]() ![]() |
8 | 6, 7 | wo 708 |
. . 3
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
9 | 8, 4 | cab 2163 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
10 | 3, 9 | wceq 1353 |
1
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Colors of variables: wff set class |
This definition is referenced by: elun 3276 nfun 3291 unipr 3823 iinuniss 3969 bdcun 14584 |
Copyright terms: Public domain | W3C validator |