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Mirrors > Home > NFE Home > Th. List > df-cross | Unicode version |
Description: Define the cross product function. (Contributed by SF, 9-Feb-2015.) |
Ref | Expression |
---|---|
df-cross | Cross |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ccross 5763 | . 2 Cross | |
2 | vx | . . 3 | |
3 | vy | . . 3 | |
4 | cvv 2859 | . . 3 | |
5 | 2 | cv 1641 | . . . 4 |
6 | 3 | cv 1641 | . . . 4 |
7 | 5, 6 | cxp 4770 | . . 3 |
8 | 2, 3, 4, 4, 7 | cmpt2 5653 | . 2 |
9 | 1, 8 | wceq 1642 | 1 Cross |
Colors of variables: wff setvar class |
This definition is referenced by: ovcross 5845 fncross 5846 crossex 5850 |
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