Eigenvalues and eigenfunctions 1 Flare 1 Magnetic fields 1 Magnetic waves 1 Methods. Data analysis 1 Methods: miscellaneous 1 Principal Components 1 Principal component analysis 1 Solar energy 1 Solar magnetic fields 1 Solar radiation 1 Summary curve 1 Sun: activity 1 Sun: magnetic field 1 Sun:magnetic fields 1 Sunspot 1 flares 1 methods: data analysis 1 methods: miscellaneous sunspots 1