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| Mirrors > Home > MPE Home > Th. List > dfsdom2 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of strict dominance. Compare Definition 3 of [Suppes] p. 97. (Contributed by NM, 31-Mar-1998.) |
| Ref | Expression |
|---|---|
| dfsdom2 | ⊢ ≺ = ( ≼ ∖ ◡ ≼ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-sdom 8955 | . 2 ⊢ ≺ = ( ≼ ∖ ≈ ) | |
| 2 | sbthcl 9097 | . . 3 ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) | |
| 3 | 2 | difeq2i 4071 | . 2 ⊢ ( ≼ ∖ ≈ ) = ( ≼ ∖ ( ≼ ∩ ◡ ≼ )) |
| 4 | difin 4218 | . 2 ⊢ ( ≼ ∖ ( ≼ ∩ ◡ ≼ )) = ( ≼ ∖ ◡ ≼ ) | |
| 5 | 1, 3, 4 | 3eqtri 2787 | 1 ⊢ ≺ = ( ≼ ∖ ◡ ≼ ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∖ cdif 3896 ∩ cin 3898 ◡ccnv 5654 ≈ cen 8949 ≼ cdom 8950 ≺ csdm 8951 |
| 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-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-pow 5330 ax-pr 5398 ax-un 7736 |
| 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-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 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-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 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-ima 5668 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 |
| This theorem is used by: brsdom2 9099 |
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