GOOD SELF DUAL CODES EXIST
Murray Hi · 1972
is defined by n where the sum is evaluated in GF(2). I, {u, u) = 0 we say that u and u are olr,thogonal. A vector u is ortho- gon d to itself, or &“%rthogonaZ, if and only if W(U) = 0 (mod 2); i.e., all ;sven weight vectors are self orthogonal. A code C? is a subspace of