Open string
= Open string
{wiki}
An open string has a worldsheet with boundary. Its endpoint conditions may be <Neumann boundary conditions>, <Dirichlet boundary conditions>, or mixtures selected independently in target-space directions.
= Open string
{wiki}
An open string has a worldsheet with boundary. Its endpoint conditions may be <Neumann boundary conditions>, <Dirichlet boundary conditions>, or mixtures selected independently in target-space directions.