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| Mirrors > Home > ILE Home > Th. List > djulf1o | GIF version | ||
| Description: The left injection function on all sets is one to one and onto. (Contributed by Jim Kingdon, 22-Jun-2022.) |
| Ref | Expression |
|---|---|
| djulf1o | ⊢ inl:V–1-1-onto→({∅} × V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ex 4260 | . 2 ⊢ ∅ ∈ V | |
| 2 | df-inl 7387 | . 2 ⊢ inl = (𝑥 ∈ V ↦ 〈∅, 𝑥〉) | |
| 3 | 1, 2 | djuf1olem 7393 | 1 ⊢ inl:V–1-1-onto→({∅} × V) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: Vcvv 2821 ∅c0 3520 {csn 3709 × cxp 4772 –1-1-onto→wf1o 5376 inlcinl 7385 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 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-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 |
| 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-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-1st 6374 df-2nd 6375 df-inl 7387 |
| This theorem is used by: casefun 7425 caseinl 7431 caseinr 7432 endjusym 7436 ctssdccl 7451 ctssdclemr 7452 dju1p1e2 7549 |
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