Question: Show that a) = x x. b) xy = (x x) (y y). c) x + y = (x

Show that
a)  = x ↓ x.
b) xy = (x ↓ x) ↓ (y ↓ y).
c) x + y = (x ↓ y) ↓ (x ↓ y).

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