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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 5093 |
. 2
| |
| 2 | dfdm4 4929 |
. 2
| |
| 3 | 1, 2 | sseqtrri 3263 |
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 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-br 4094 df-opab 4156 df-xp 4737 df-cnv 4739 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 |
| This theorem is referenced by: fvimacnvi 5770 elpreima 5775 fconst4m 5882 fsuppeq 6425 fsuppeqg 6426 pw2f1odclem 7063 nn0supp 9515 fisumss 12033 fprodssdc 12231 1arith 13020 ghmpreima 13933 psrbagfi 14770 cnpnei 15030 cnclima 15034 cnntri 15035 cnntr 15036 cncnp 15041 cnrest2 15047 cndis 15052 txcnmpt 15084 txdis1cn 15089 hmeoimaf1o 15125 xmeter 15247 |
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