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| Mirrors > Home > ILE Home > Th. List > Mathboxes > bdvsn | Unicode version | ||
| Description: Equality of a setvar with a singleton of a setvar is a bounded formula. (Contributed by BJ, 16-Oct-2019.) |
| Ref | Expression |
|---|---|
| bdvsn |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bdcsn 16810 |
. . . 4
| |
| 2 | 1 | bdss 16804 |
. . 3
|
| 3 | bdcv 16788 |
. . . 4
| |
| 4 | 3 | bdsnss 16813 |
. . 3
|
| 5 | 2, 4 | ax-bdan 16755 |
. 2
|
| 6 | eqss 3263 |
. 2
| |
| 7 | 5, 6 | bd0r 16765 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-bd0 16753 ax-bdan 16755 ax-bdal 16758 ax-bdeq 16760 ax-bdel 16761 ax-bdsb 16762 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-v 2823 df-in 3226 df-ss 3233 df-sn 3711 df-bdc 16781 |
| This theorem is referenced by: bdop 16815 |
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