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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 5087 | . 2 ⊢ (◡𝐴 “ 𝐵) ⊆ ran ◡𝐴 | |
| 2 | dfdm4 4923 | . 2 ⊢ dom 𝐴 = ran ◡𝐴 | |
| 3 | 1, 2 | sseqtrri 3262 | 1 ⊢ (◡𝐴 “ 𝐵) ⊆ dom 𝐴 |
| Colors of variables: wff set class |
| Syntax hints: ⊆ wss 3200 ◡ccnv 4724 dom cdm 4725 ran crn 4726 “ cima 4728 |
| 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-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-xp 4731 df-cnv 4733 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 |
| This theorem is referenced by: fvimacnvi 5762 elpreima 5767 fconst4m 5875 pw2f1odclem 7023 nn0supp 9457 fisumss 11974 fprodssdc 12172 1arith 12961 ghmpreima 13874 psrbagfi 14710 cnpnei 14970 cnclima 14974 cnntri 14975 cnntr 14976 cncnp 14981 cnrest2 14987 cndis 14992 txcnmpt 15024 txdis1cn 15029 hmeoimaf1o 15065 xmeter 15187 |
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