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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 8976 | . . 3 ⊢ ≺ = ( ≼ ∖ ≈ ) | |
| 2 | 1 | eleq2i 2853 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ ≺ ↔ 〈𝐴, 𝐵〉 ∈ ( ≼ ∖ ≈ )) |
| 3 | df-br 5104 | . 2 ⊢ (𝐴 ≺ 𝐵 ↔ 〈𝐴, 𝐵〉 ∈ ≺ ) | |
| 4 | df-br 5104 | . . . 4 ⊢ (𝐴 ≼ 𝐵 ↔ 〈𝐴, 𝐵〉 ∈ ≼ ) | |
| 5 | df-br 5104 | . . . . 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 3909 | . . 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 2145 ∖ cdif 3896 〈cop 4590 class class class wbr 5103 ≈ cen 8970 ≼ cdom 8971 ≺ csdm 8972 |
| 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 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-v 3453 df-dif 3902 df-br 5104 df-sdom 8976 |
| This theorem is used by: sdomdom 9007 sdomnen 9008 0sdomg 9125 sdom0 9128 sdomdomtr 9129 domsdomtr 9131 domtriord 9142 canth2 9149 sdomdomtrfi 9216 domsdomtrfi 9217 php2 9223 nnsdomo 9234 1sdom2 9239 sdom1 9241 1sdom2dom 9245 nnsdomg 9291 card2inf 9549 cardsdomelir 10054 cardsdom2 10069 fidomtri2 10075 cardmin2 10080 alephordi 10153 alephord 10154 isfin4p1 10393 isfin5-2 10469 canthnum 10734 canthwe 10736 canthp1 10739 gchdjuidm 10753 gchxpidm 10754 gchhar 10764 axgroth6 10913 hashsdom 14525 ruc 16411 iscard5 44536 |
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