Spherical Coordinates of Jankel Adler (1895-1949) on Payphone 
      Jankel Adler (1895-1949), 2002, oil on canvas, 32×41 cm 
     
      - Cylinder and spherical coordinates. 
  - Introducing spherical coordinates. 
  - The acceleration in spherical coordinates. 
  - The gravitational field of a spherically symmetric mass. 
  - Spherical coordinates and cylinder coordinates.
  - Volume integration in spherical coordinates. 
  - Reaction and transmission by a stack of layers. 
  - Cylinder coordinates. 
  - The divergence in cylinder coordinates. 
  - Is life possible in a 5-dimensional world.
  
  - The first source of vorticity rigid rotation. 
  - The second source of vorticity shear. 
  - The magnetic field induced by a straight current.
  - A representation theorem for acoustic waves.  
  - Statement of Stokes law. 
  - Stokes theorem from the theorem of Gauss. 
  - The magnetic field of a current in a straight wire.
  
  - Viscosity and the Navier Stokes equation.
  
  - The adjective terms in the equation of motion.  
  - Is there convection in the Earths mantle.
  - Making an equation dimensionless. 
  - Projections and the completeness relation. 
  - A projection on vectors that are not orthogonal. 
  - The Green's function as impulse response. 
- The Green's function for a general problem. 
- Radiogenic heating and the earths temperature. 
- Nonlinear systems and Greens functions. 
- Dipoles, quadrupoles and general relativity. 
- The quadrupole field of the Earth. 
- Computing a function of a matrix. 
- The normal modes of a vibrating system. 
- Normal modes and orthogonality relations. 
- Bessel functions are decaying cosines. 
- Legendre functions are decaying cosines. 
- Normal modes and the Green's function. 
- Guided waves in a low velocity channel. 
- The Green's function of the gravitational potential. 
- Upward continuation in a flat geometry. 
- Application to some integrals. 
- Linear filters and linear algebra. 
- The theorem of Cauchy Riemann. 
- Fluid flow and analytic functions.
  
  - The real Fourier series on a infinite interval. 
  - The complex Fourier series on an infinite interval. 
  - The Fourier transform on an  infinite interval. 
  - The Fourier transform and the delta function. 
  - Changing the sign and scale factor. 
  - The convolution and correlation of two signals. 
  - Linear filters and the convolution theorem. 
  - The deriverberation filter.
  bibliographies
      Spherical Coordinates  of Jankel Adler (1895-1949) on Payphone