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| Mirrors > Home > ILE Home > Th. List > cnvimass | GIF version | ||
| Description: A preimage under any class is included in the domain of the class. (Contributed by FL, 29-Jan-2007.) |
| Ref | Expression |
|---|---|
| cnvimass | ⊢ (◡𝐴 “ 𝐵) ⊆ dom 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | imassrn 5140 | . 2 ⊢ (◡𝐴 “ 𝐵) ⊆ ran ◡𝐴 | |
| 2 | dfdm4 4975 | . 2 ⊢ dom 𝐴 = ran ◡𝐴 | |
| 3 | 1, 2 | sseqtrri 3283 | 1 ⊢ (◡𝐴 “ 𝐵) ⊆ dom 𝐴 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ⊆ wss 3220 ◡ccnv 4775 dom cdm 4776 ran crn 4777 “ cima 4779 |
| 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 4251 ax-pow 4313 ax-pr 4348 |
| 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 4132 df-opab 4194 df-xp 4782 df-cnv 4784 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 |
| This theorem is used by: fvimacnvi 5826 elpreima 5831 fconst4m 5938 fsuppeq 6491 fsuppeqg 6492 pw2f1odclem 7139 nn0supp 9631 fisumss 12185 fprodssdc 12383 1arith 13176 ghmpreima 14129 psrbagfi 15168 cnpnei 15457 cnclima 15461 cnntri 15462 cnntr 15463 cncnp 15468 cnrest2 15474 cndis 15479 txcnmpt 15511 txdis1cn 15516 hmeoimaf1o 15552 xmeter 15674 |
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