A
closed string (more accurately,
closed coil) is a
string state with no
open🔓 circuitry (does not have
endpoints; forms a
loop). All
game-related
strategies (
goals) are devised to obtain a
closed string (thereby
solving and validating it as some
fibor, although the
game itself may still be
open) via
folding. (see also
zero-bubble,
loop)
Actually, there is no loop requirement for a string to be closed (not open), since the end of the string must attach to a (mem)brane (even if that membrane is the string's other endpoint). Therefore, the yield is derived when in that a string is closed, but only by acoustic approximation.
