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| Mirrors > Home > ILE Home > Th. List > nfunv | GIF version | ||
| Description: The universe is not a function. (Contributed by Raph Levien, 27-Jan-2004.) |
| Ref | Expression |
|---|---|
| nfunv | ⊢ ¬ Fun V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0nelxp 4716 | . . 3 ⊢ ¬ ∅ ∈ (V × V) | |
| 2 | 0ex 4182 | . . . 4 ⊢ ∅ ∈ V | |
| 3 | df-rel 4695 | . . . . . 6 ⊢ (Rel V ↔ V ⊆ (V × V)) | |
| 4 | 3 | biimpi 120 | . . . . 5 ⊢ (Rel V → V ⊆ (V × V)) |
| 5 | 4 | sseld 3196 | . . . 4 ⊢ (Rel V → (∅ ∈ V → ∅ ∈ (V × V))) |
| 6 | 2, 5 | mpi 15 | . . 3 ⊢ (Rel V → ∅ ∈ (V × V)) |
| 7 | 1, 6 | mto 664 | . 2 ⊢ ¬ Rel V |
| 8 | funrel 5302 | . 2 ⊢ (Fun V → Rel V) | |
| 9 | 7, 8 | mto 664 | 1 ⊢ ¬ Fun V |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 ∈ wcel 2177 Vcvv 2773 ⊆ wss 3170 ∅c0 3464 × cxp 4686 Rel wrel 4693 Fun wfun 5279 |
| 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-in1 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-14 2180 ax-ext 2188 ax-sep 4173 ax-nul 4181 ax-pow 4229 ax-pr 4264 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-v 2775 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-nul 3465 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-opab 4117 df-xp 4694 df-rel 4695 df-fun 5287 |
| This theorem is referenced by: (None) |
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