Interesting Functions

Hardest n-input for (AND, OR, XOR)
(1) 1
(2) x+y = 1
(3) x+y+z = 1
(4) x+y+z+w = 1
(5) x+y+z+w+v in 0,3

Hardest n-input for (AND, OR)
(1) 1
(2) x^y
(3) x^y^z
(4) x^y^z^w
(5) x+y+z+w+v in 0,1,3,
x+y+z+w+v in 0,1,3 || x&y&z&w&!v,
x+y+z+w+v in 1,3 || x&y&z&w&!v

Boolean Oracle

This web server computes a minimal Boolean formula for a given function, using the operator sets (AND, OR, XOR) and (AND, OR).

Query: x^y^z^w (truth table 0x3cc3c33c, canonical 0x3cc3c33c)

A minimal Boolean formula using AND, OR, and XOR requires 3 operators. One such formula is:

¬x ^ w ^ ¬y ^ z

A minimal Boolean formula using AND and OR requires 15 operators. One such formula is:

((¬y & z) | (y & ¬z) | ((¬x | ¬w) & (x | w))) & ((¬y & ¬z) | (y & z) | (x & w) | (¬x & ¬w))