Waves and oscillations in the corona: Theory, in Solar Variability

Recent observations of oscillatory phenomena in the corona have provided considerable impetus to the theoretical development of magnetohydrodynamic wave theory in magnetic structures. This review aims to lay out some of the basic ideas and unifying principles that underpin many of the theoretical models of waves and oscillations in magnetic structures. The combination of such theories and the observations leads towards the development of a coronal seismology and moreover promises to provide a greater understanding of coronal heating.