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Related theorems GIF version |
| Description: A cross product is included in the ordered pair universe. Exercise 3 of [TakeutiZaring] p. 25. |
| Ref | Expression |
|---|---|
| xpss | ⊢ (A × B) ⊆ (V × V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm3.26 319 | . . . 4 ⊢ ((z = 〈x, y〉 ⋀ (x ∈ A ⋀ y ∈ B)) → z = 〈x, y〉) | |
| 2 | 1 | 19.22i2 1043 | . . 3 ⊢ (∃x∃y(z = 〈x, y〉 ⋀ (x ∈ A ⋀ y ∈ B)) → ∃x∃y z = 〈x, y〉) |
| 3 | elxp 3208 | . . 3 ⊢ (z ∈ (A × B) ↔ ∃x∃y(z = 〈x, y〉 ⋀ (x ∈ A ⋀ y ∈ B))) | |
| 4 | elvv 3234 | . . 3 ⊢ (z ∈ (V × V) ↔ ∃x∃y z = 〈x, y〉) | |
| 5 | 2, 3, 4 | 3imtr4 219 | . 2 ⊢ (z ∈ (A × B) → z ∈ (V × V)) |
| 6 | 5 | ssriv 2072 | 1 ⊢ (A × B) ⊆ (V × V) |
| Colors of variables: wff set class |
| Syntax hints: ⋀ wa 223 = wceq 958 ∈ wcel 960 ∃wex 982 Vcvv 1814 ⊆ wss 2050 〈cop 2415 × cxp 3174 |
| This theorem is referenced by: relxp 3261 relres 3393 dff2 3823 nvrel 8217 relded 10644 relcat 10665 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2708 ax-pow 2748 ax-pr 2785 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-v 1815 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-opab 2672 df-xp 3190 |