This is a 4 sphere Venn diagram, representing a 4-ary Boolean function.

The spheres stand for sets or statements A, B, C, D.

Examples:

${\displaystyle A\cap B}$	${\displaystyle \cap }$	${\displaystyle C~}$	${\displaystyle =~}$	${\displaystyle A\cap B\cap C}$
	${\displaystyle \cap }$		${\displaystyle =~}$

${\displaystyle A\cap B\cap C}$	${\displaystyle \cap }$	${\displaystyle D~}$	${\displaystyle =~}$	${\displaystyle A\cap B\cap C\cap D}$
	${\displaystyle \cap }$		${\displaystyle =~}$

${\displaystyle \{\}^{C}~}$	${\displaystyle \setminus ~}$	${\displaystyle D~}$	${\displaystyle =~}$	${\displaystyle D^{C}~}$
	${\displaystyle \setminus ~}$		${\displaystyle =~}$

The POV-Ray source is given for 0000 0001 0001 0110 and 1111 1111 0000 0000.

 This image was created with POV-Ray.

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