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Related theorems GIF version |
| Description: The cross product of two singletons. |
| Ref | Expression |
|---|---|
| fsn.1 | ⊢ A ∈ V |
| fsn.2 | ⊢ B ∈ V |
| Ref | Expression |
|---|---|
| xpsn | ⊢ ({A} × {B}) = {〈A, B〉} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fsn.2 | . . 3 ⊢ B ∈ V | |
| 2 | 1 | fconst 3664 | . 2 ⊢ ({A} × {B}):{A}–→{B} |
| 3 | fsn.1 | . . 3 ⊢ A ∈ V | |
| 4 | 3, 1 | fsn 3840 | . 2 ⊢ (({A} × {B}):{A}–→{B} ↔ ({A} × {B}) = {〈A, B〉}) |
| 5 | 2, 4 | mpbi 189 | 1 ⊢ ({A} × {B}) = {〈A, B〉} |
| Colors of variables: wff set class |
| Syntax hints: = wceq 958 ∈ wcel 960 Vcvv 1814 {csn 2413 〈cop 2415 × cxp 3174 –→wf 3184 |
| This theorem is referenced by: grpsn 8120 ablsn 8121 ringsn 8159 |
| 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-9 967 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-nul 2715 ax-pow 2748 ax-pr 2785 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 779 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-ral 1652 df-reu 1654 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-br 2625 df-opab 2672 df-id 2841 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-fun 3198 df-fn 3199 df-f 3200 df-f1 3201 df-fo 3202 df-f1o 3203 |