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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dffunALTV2 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the function relation predicate, cf. dfdisjALTV2 39548. (Contributed by Peter Mazsa, 8-Feb-2018.) |
| Ref | Expression |
|---|---|
| dffunALTV2 | ⊢ ( FunALTV 𝐹 ↔ ( ≀ 𝐹 ⊆ I ∧ Rel 𝐹)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-funALTV 39516 | . 2 ⊢ ( FunALTV 𝐹 ↔ ( CnvRefRel ≀ 𝐹 ∧ Rel 𝐹)) | |
| 2 | cnvrefrelcoss2 39366 | . . 3 ⊢ ( CnvRefRel ≀ 𝐹 ↔ ≀ 𝐹 ⊆ I ) | |
| 3 | 2 | anbi1i 636 | . 2 ⊢ (( CnvRefRel ≀ 𝐹 ∧ Rel 𝐹) ↔ ( ≀ 𝐹 ⊆ I ∧ Rel 𝐹)) |
| 4 | 1, 3 | bitri 278 | 1 ⊢ ( FunALTV 𝐹 ↔ ( ≀ 𝐹 ⊆ I ∧ Rel 𝐹)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 ⊆ wss 3899 I cid 5549 Rel wrel 5660 ≀ ccoss 38932 CnvRefRel wcnvrefrel 38941 FunALTV wfunALTV 38965 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-11 2194 ax-ext 2732 ax-sep 5251 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-coss 39250 df-cnvrefrel 39356 df-funALTV 39516 |
| This theorem is used by: dffunALTV3 39523 dffunALTV4 39524 dffunALTV5 39525 funALTVss 39533 |
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