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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 16465 |
. . . 4
| |
| 2 | 1 | bdss 16459 |
. . 3
|
| 3 | bdcv 16443 |
. . . 4
| |
| 4 | 3 | bdsnss 16468 |
. . 3
|
| 5 | 2, 4 | ax-bdan 16410 |
. 2
|
| 6 | eqss 3242 |
. 2
| |
| 7 | 5, 6 | bd0r 16420 |
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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-bd0 16408 ax-bdan 16410 ax-bdal 16413 ax-bdeq 16415 ax-bdel 16416 ax-bdsb 16417 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-v 2804 df-in 3206 df-ss 3213 df-sn 3675 df-bdc 16436 |
| This theorem is referenced by: bdop 16470 |
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