TOPICS
XNOR
XNOR is the connective in logic corresponding to the exclusive nor operation. 
XNOR 
is equivalent to 
, where 
denotes AND, 
denotes OR, and 
denotes NOT. The circuit diagram
symbol for an XNOR gate is illustrated above, and the XNOR truth
table is given below for two arguments. For two arguments, "
XNOR 
"
is identical to "
iff 
"
and "
is equivalent
to 
" (
).
 |  | 
XNOR  |
| T | T | T |
| T | F | F |
| F | T | F |
| F | F | T |
See also
AND, Binary Operator, Boolean Algebra, Connective, Equivalent, Iff, Logic, NAND, NOR, NOT, OR, Pascal's Triangle, Truth Table, XORExplore with Wolfram|Alpha
References
Simpson, R. E. "The Exclusive NOR (XNOR) Gate." §12.5.7 in Introductory Electronics for Scientists and Engineers, 2nd ed. Boston, MA: Allyn and Bacon, pp. 539 and 554, 1987.Referenced on Wolfram|Alpha
XNORCite this as:
Weisstein, Eric W. "XNOR." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/XNOR.html