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| Mirrors > Home > MPE Home > Th. List > elfzoelz | Structured version Visualization version Unicode version | ||
| Description: Reverse closure for half-open integer sets. (Contributed by Stefan O'Rear, 14-Aug-2015.) |
| Ref | Expression |
|---|---|
| elfzoelz |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfzoel1 12468 |
. . . 4
| |
| 2 | elfzoel2 12469 |
. . . 4
| |
| 3 | fzof 12467 |
. . . . 5
| |
| 4 | 3 | fovcl 6765 |
. . . 4
|
| 5 | 1, 2, 4 | syl2anc 693 |
. . 3
|
| 6 | 5 | elpwid 4170 |
. 2
|
| 7 | id 22 |
. 2
| |
| 8 | 6, 7 | sseldd 3604 |
1
|
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