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| Mirrors > Home > MPE Home > Th. List > brsdom | Structured version Visualization version GIF version | ||
| Description: Strict dominance relation, meaning "𝐵 is strictly greater in size than 𝐴". Definition of [Mendelson] p. 255. (Contributed by NM, 25-Jun-1998.) |
| Ref | Expression |
|---|---|
| brsdom | ⊢ (𝐴 ≺ 𝐵 ↔ (𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-sdom 8952 | . . 3 ⊢ ≺ = ( ≼ ∖ ≈ ) | |
| 2 | 1 | eleq2i 2857 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ ≺ ↔ 〈𝐴, 𝐵〉 ∈ ( ≼ ∖ ≈ )) |
| 3 | df-br 5112 | . 2 ⊢ (𝐴 ≺ 𝐵 ↔ 〈𝐴, 𝐵〉 ∈ ≺ ) | |
| 4 | df-br 5112 | . . . 4 ⊢ (𝐴 ≼ 𝐵 ↔ 〈𝐴, 𝐵〉 ∈ ≼ ) | |
| 5 | df-br 5112 | . . . . 5 ⊢ (𝐴 ≈ 𝐵 ↔ 〈𝐴, 𝐵〉 ∈ ≈ ) | |
| 6 | 5 | notbii 323 | . . . 4 ⊢ (¬ 𝐴 ≈ 𝐵 ↔ ¬ 〈𝐴, 𝐵〉 ∈ ≈ ) |
| 7 | 4, 6 | anbi12i 640 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵) ↔ (〈𝐴, 𝐵〉 ∈ ≼ ∧ ¬ 〈𝐴, 𝐵〉 ∈ ≈ )) |
| 8 | eldif 3916 | . . 3 ⊢ (〈𝐴, 𝐵〉 ∈ ( ≼ ∖ ≈ ) ↔ (〈𝐴, 𝐵〉 ∈ ≼ ∧ ¬ 〈𝐴, 𝐵〉 ∈ ≈ )) | |
| 9 | 7, 8 | bitr4i 281 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵) ↔ 〈𝐴, 𝐵〉 ∈ ( ≼ ∖ ≈ )) |
| 10 | 2, 3, 9 | 3bitr4i 306 | 1 ⊢ (𝐴 ≺ 𝐵 ↔ (𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ↔ wb 209 ∧ wa 401 ∈ wcel 2146 ∖ cdif 3903 〈cop 4597 class class class wbr 5111 ≈ cen 8946 ≼ cdom 8947 ≺ csdm 8948 |
| 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-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-v 3459 df-dif 3909 df-br 5112 df-sdom 8952 |
| This theorem is used by: sdomdom 8983 sdomnen 8984 0sdomg 9101 sdom0 9104 sdomdomtr 9105 domsdomtr 9107 domtriord 9118 canth2 9125 sdomdomtrfi 9192 domsdomtrfi 9193 php2 9199 nnsdomo 9210 1sdom2 9215 sdom1 9217 1sdom2dom 9221 nnsdomg 9266 card2inf 9524 cardsdomelir 9975 cardsdom2 9990 fidomtri2 9996 cardmin2 10001 alephordi 10074 alephord 10075 isfin4p1 10314 isfin5-2 10390 canthnum 10651 canthwe 10653 canthp1 10656 gchdjuidm 10670 gchxpidm 10671 gchhar 10681 axgroth6 10830 hashsdom 14437 ruc 16323 iscard5 44322 |
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