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| Mirrors > Home > MPE Home > Th. List > dfse3 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of set-like relationships. (Contributed by Scott Fenton, 19-Aug-2024.) |
| Ref | Expression |
|---|---|
| dfse3 | ⊢ (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 Pred(𝑅, 𝐴, 𝑥) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfse2 6096 | . 2 ⊢ (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 (𝐴 ∩ (◡𝑅 “ {𝑥})) ∈ V) | |
| 2 | df-pred 6299 | . . . 4 ⊢ Pred(𝑅, 𝐴, 𝑥) = (𝐴 ∩ (◡𝑅 “ {𝑥})) | |
| 3 | 2 | eleq1i 2851 | . . 3 ⊢ (Pred(𝑅, 𝐴, 𝑥) ∈ V ↔ (𝐴 ∩ (◡𝑅 “ {𝑥})) ∈ V) |
| 4 | 3 | ralbii 3108 | . 2 ⊢ (∀𝑥 ∈ 𝐴 Pred(𝑅, 𝐴, 𝑥) ∈ V ↔ ∀𝑥 ∈ 𝐴 (𝐴 ∩ (◡𝑅 “ {𝑥})) ∈ V) |
| 5 | 1, 4 | bitr4i 281 | 1 ⊢ (𝑅 Se 𝐴 ↔ ∀𝑥 ∈ 𝐴 Pred(𝑅, 𝐴, 𝑥) ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∈ wcel 2145 ∀wral 3076 Vcvv 3450 ∩ cin 3898 {csn 4584 Se wse 5606 ◡ccnv 5654 “ cima 5658 Predcpred 6298 |
| 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-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-se 5609 df-xp 5661 df-cnv 5663 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 |
| This theorem is used by: sexp2 8144 sexp3 8151 ttrclselem2 9705 ttrclse 9706 |
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