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| Mirrors > Home > MPE Home > Th. List > fvex | Structured version Visualization version Unicode version | ||
| Description: The value of a class exists. Corollary 6.13 of [TakeutiZaring] p. 27. (Contributed by NM, 30-Dec-1996.) |
| Ref | Expression |
|---|---|
| fvex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-fv 5896 |
. 2
| |
| 2 | iotaex 5868 |
. 2
| |
| 3 | 1, 2 | eqeltri 2697 |
1
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