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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 5137 |
. 2
| |
| 2 | dfdm4 4973 |
. 2
| |
| 3 | 1, 2 | sseqtrri 3283 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on 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-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-br 4131 df-opab 4193 df-xp 4780 df-cnv 4782 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 |
| This theorem is used by: fvimacnvi 5823 elpreima 5828 fconst4m 5935 fsuppeq 6487 fsuppeqg 6488 pw2f1odclem 7134 nn0supp 9623 fisumss 12175 fprodssdc 12373 1arith 13166 ghmpreima 14118 psrbagfi 15108 cnpnei 15369 cnclima 15373 cnntri 15374 cnntr 15375 cncnp 15380 cnrest2 15386 cndis 15391 txcnmpt 15423 txdis1cn 15428 hmeoimaf1o 15464 xmeter 15586 |
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