A visualization of the Fourier cosine series for the function

–ln(4cos^2(πx))/2π.

Edition of 5; signed and numbered.

Paper size: 12” × 9” (approx. 30 cm × 23 cm).

Plotted with an AxiDraw V3, using archival Noodlers ink from a Rotring 600 fountain pen on archival Fabriano Bristol paper.

Editions may have some slight flaws where ink failed to transfer to the paper; see last photo for an example.