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| Mirrors > Home > NFE Home > Th. List > df-ins3 | Unicode version | ||
| Description: Define the third insertion operation. (Contributed by SF, 9-Feb-2015.) |
| Ref | Expression |
|---|---|
| df-ins3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cA |
. . 3
| |
| 2 | 1 | cins3 5752 |
. 2
|
| 3 | cvv 2860 |
. . 3
| |
| 4 | 1, 3 | ctxp 5736 |
. 2
|
| 5 | 2, 4 | wceq 1642 |
1
|
| Colors of variables: wff setvar class |
| This definition is referenced by: otelins3 5793 ins3exg 5797 |
| Copyright terms: Public domain | W3C validator |