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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 8948 | . 2 ⊢ ≺ = ( ≼ ∖ ≈ ) | |
| 2 | sbthcl 9090 | . . 3 ⊢ ≈ = ( ≼ ∩ ◡ ≼ ) | |
| 3 | 2 | difeq2i 4078 | . 2 ⊢ ( ≼ ∖ ≈ ) = ( ≼ ∖ ( ≼ ∩ ◡ ≼ )) |
| 4 | difin 4225 | . 2 ⊢ ( ≼ ∖ ( ≼ ∩ ◡ ≼ )) = ( ≼ ∖ ◡ ≼ ) | |
| 5 | 1, 3, 4 | 3eqtri 2792 | 1 ⊢ ≺ = ( ≼ ∖ ◡ ≼ ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∖ cdif 3903 ∩ cin 3905 ◡ccnv 5662 ≈ cen 8942 ≼ cdom 8943 ≺ csdm 8944 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-pow 5338 ax-pr 5406 ax-un 7738 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 |
| This theorem is used by: brsdom2 9092 |
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