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| Mirrors > Home > ILE Home > Th. List > structn0fun | GIF version | ||
| Description: A structure without the empty set is a function. (Contributed by AV, 13-Nov-2021.) |
| Ref | Expression |
|---|---|
| structn0fun | ⊢ (𝐹 Struct 𝑋 → Fun (𝐹 ∖ {∅})) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isstruct2im 13094 | . 2 ⊢ (𝐹 Struct 𝑋 → (𝑋 ∈ ( ≤ ∩ (ℕ × ℕ)) ∧ Fun (𝐹 ∖ {∅}) ∧ dom 𝐹 ⊆ (...‘𝑋))) | |
| 2 | 1 | simp2d 1036 | 1 ⊢ (𝐹 Struct 𝑋 → Fun (𝐹 ∖ {∅})) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2202 ∖ cdif 3197 ∩ cin 3199 ⊆ wss 3200 ∅c0 3494 {csn 3669 class class class wbr 4088 × cxp 4723 dom cdm 4725 Fun wfun 5320 ‘cfv 5326 ≤ cle 8215 ℕcn 9143 ...cfz 10243 Struct cstr 13080 |
| 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-rab 2519 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-iota 5286 df-fun 5328 df-fv 5334 df-struct 13086 |
| This theorem is referenced by: structcnvcnv 13100 structfung 13101 setsn0fun 13121 basvtxval2dom 15888 edgfiedgval2dom 15889 structiedg0val 15894 |
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