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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 4753 | . . 3 ⊢ ¬ ∅ ∈ (V × V) | |
| 2 | 0ex 4216 | . . . 4 ⊢ ∅ ∈ V | |
| 3 | df-rel 4732 | . . . . . 6 ⊢ (Rel V ↔ V ⊆ (V × V)) | |
| 4 | 3 | biimpi 120 | . . . . 5 ⊢ (Rel V → V ⊆ (V × V)) |
| 5 | 4 | sseld 3226 | . . . 4 ⊢ (Rel V → (∅ ∈ V → ∅ ∈ (V × V))) |
| 6 | 2, 5 | mpi 15 | . . 3 ⊢ (Rel V → ∅ ∈ (V × V)) |
| 7 | 1, 6 | mto 668 | . 2 ⊢ ¬ Rel V |
| 8 | funrel 5343 | . 2 ⊢ (Fun V → Rel V) | |
| 9 | 7, 8 | mto 668 | 1 ⊢ ¬ Fun V |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 ∈ wcel 2202 Vcvv 2802 ⊆ wss 3200 ∅c0 3494 × cxp 4723 Rel wrel 4730 Fun wfun 5320 |
| 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 619 ax-in2 620 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-nul 4215 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-opab 4151 df-xp 4731 df-rel 4732 df-fun 5328 |
| This theorem is referenced by: (None) |
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