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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 16627 |
. . . 4
| |
| 2 | 1 | bdss 16621 |
. . 3
|
| 3 | bdcv 16605 |
. . . 4
| |
| 4 | 3 | bdsnss 16630 |
. . 3
|
| 5 | 2, 4 | ax-bdan 16572 |
. 2
|
| 6 | eqss 3252 |
. 2
| |
| 7 | 5, 6 | bd0r 16582 |
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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-bd0 16570 ax-bdan 16572 ax-bdal 16575 ax-bdeq 16577 ax-bdel 16578 ax-bdsb 16579 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-v 2814 df-in 3216 df-ss 3223 df-sn 3694 df-bdc 16598 |
| This theorem is referenced by: bdop 16632 |
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