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| Mirrors > Home > ILE Home > Th. List > cnvimass | Unicode version | ||
| Description: A preimage under any class is included in the domain of the class. (Contributed by FL, 29-Jan-2007.) |
| Ref | Expression |
|---|---|
| cnvimass |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | imassrn 5112 |
. 2
| |
| 2 | dfdm4 4948 |
. 2
| |
| 3 | 1, 2 | sseqtrri 3273 |
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-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-br 4110 df-opab 4172 df-xp 4755 df-cnv 4757 df-dm 4759 df-rn 4760 df-res 4761 df-ima 4762 |
| This theorem is referenced by: fvimacnvi 5792 elpreima 5797 fconst4m 5904 fsuppeq 6447 fsuppeqg 6448 pw2f1odclem 7087 nn0supp 9552 fisumss 12078 fprodssdc 12276 1arith 13065 ghmpreima 13983 psrbagfi 14823 cnpnei 15084 cnclima 15088 cnntri 15089 cnntr 15090 cncnp 15095 cnrest2 15101 cndis 15106 txcnmpt 15138 txdis1cn 15143 hmeoimaf1o 15179 xmeter 15301 |
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