All examples here fit left in BP369, a version where the figure is allowed to pass through itself while being deformed.
Adjacent-numbered pages: BP846 BP847 BP848 BP849 BP850  *  BP852 BP853 BP854 BP855 BP856
math, traditional
figure_made_of_curves_and_quotient_by_hollow_dots [smaller | same | bigger]
Aaron David Fairbanks