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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 4978 | . 2 ⊢ (◡𝐴 “ 𝐵) ⊆ ran ◡𝐴 | |
2 | dfdm4 4816 | . 2 ⊢ dom 𝐴 = ran ◡𝐴 | |
3 | 1, 2 | sseqtrri 3190 | 1 ⊢ (◡𝐴 “ 𝐵) ⊆ dom 𝐴 |
Colors of variables: wff set class |
Syntax hints: ⊆ wss 3129 ◡ccnv 4623 dom cdm 4624 ran crn 4625 “ cima 4627 |
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 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-14 2151 ax-ext 2159 ax-sep 4119 ax-pow 4172 ax-pr 4207 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ral 2460 df-rex 2461 df-v 2739 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-br 4002 df-opab 4063 df-xp 4630 df-cnv 4632 df-dm 4634 df-rn 4635 df-res 4636 df-ima 4637 |
This theorem is referenced by: fvimacnvi 5627 elpreima 5632 fconst4m 5733 nn0supp 9222 fisumss 11391 fprodssdc 11589 1arith 12355 cnpnei 13501 cnclima 13505 cnntri 13506 cnntr 13507 cncnp 13512 cnrest2 13518 cndis 13523 txcnmpt 13555 txdis1cn 13560 hmeoimaf1o 13596 xmeter 13718 |
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